diff --git a/.golangci.yml b/.golangci.yml
index c1e71ac4f..25d8c1bea 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -59,7 +59,7 @@ linters:
     - misspell
     # - nakedret
     - nilerr
-    - paralleltest
+    # - paralleltest
     # - scopelint
     - staticcheck
     - structcheck
diff --git a/Makefile b/Makefile
index e5ba4f613..a9b95e332 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ default: fmt get update test lint
 
 GO       := go
 GOBUILD  := CGO_ENABLED=0 $(GO) build $(BUILD_FLAG)
-GOTEST   := $(GO) test -gcflags='-l' -p 1 -parallel 1 -race -timeout 10m -coverprofile=profile.out -covermode=atomic
+GOTEST   := $(GO) test -race -timeout 10m -coverprofile=profile.out -covermode=atomic
 
 FILES    := $(shell find . -name '*.go' -type f -not -name '*.pb.go' -not -name '*_generated.go' -not -name '*_test.go')
 TESTS    := $(shell find . -name '*.go' -type f -not -name '*.pb.go' -not -name '*_generated.go' -name '*_test.go')
diff --git a/acl_create_request_test.go b/acl_create_request_test.go
index 896b36d6c..1c636d01f 100644
--- a/acl_create_request_test.go
+++ b/acl_create_request_test.go
@@ -25,7 +25,6 @@ var (
 )
 
 func TestCreateAclsRequestv0(t *testing.T) {
-	t.Parallel()
 	req := &CreateAclsRequest{
 		Version: 0,
 		AclCreations: []*AclCreation{
@@ -48,7 +47,6 @@ func TestCreateAclsRequestv0(t *testing.T) {
 }
 
 func TestCreateAclsRequestv1(t *testing.T) {
-	t.Parallel()
 	req := &CreateAclsRequest{
 		Version: 1,
 		AclCreations: []*AclCreation{
diff --git a/acl_create_response_test.go b/acl_create_response_test.go
index 020c8b378..65b934d9a 100644
--- a/acl_create_response_test.go
+++ b/acl_create_response_test.go
@@ -24,7 +24,6 @@ var (
 )
 
 func TestCreateAclsResponse(t *testing.T) {
-	t.Parallel()
 	errmsg := "error"
 	resp := &CreateAclsResponse{
 		ThrottleTime: 100 * time.Millisecond,
diff --git a/acl_delete_request_test.go b/acl_delete_request_test.go
index 6b456f5c8..cb126e30f 100644
--- a/acl_delete_request_test.go
+++ b/acl_delete_request_test.go
@@ -63,7 +63,6 @@ var (
 )
 
 func TestDeleteAclsRequest(t *testing.T) {
-	t.Parallel()
 	req := &DeleteAclsRequest{
 		Filters: []*AclFilter{{
 			ResourceType:   AclResourceAny,
@@ -92,7 +91,6 @@ func TestDeleteAclsRequest(t *testing.T) {
 }
 
 func TestDeleteAclsRequestV1(t *testing.T) {
-	t.Parallel()
 	req := &DeleteAclsRequest{
 		Version: 1,
 		Filters: []*AclFilter{{
diff --git a/acl_delete_response_test.go b/acl_delete_response_test.go
index e8ba57753..eb57d68a5 100644
--- a/acl_delete_response_test.go
+++ b/acl_delete_response_test.go
@@ -22,7 +22,6 @@ var deleteAclsResponse = []byte{
 }
 
 func TestDeleteAclsResponse(t *testing.T) {
-	t.Parallel()
 	resp := &DeleteAclsResponse{
 		ThrottleTime: 100 * time.Millisecond,
 		FilterResponses: []*FilterResponse{{
diff --git a/acl_describe_request_test.go b/acl_describe_request_test.go
index 6a090c330..3cb73eb79 100644
--- a/acl_describe_request_test.go
+++ b/acl_describe_request_test.go
@@ -25,7 +25,6 @@ var (
 )
 
 func TestAclDescribeRequestV0(t *testing.T) {
-	t.Parallel()
 	resourcename := "topic"
 	principal := "principal"
 	host := "host"
@@ -45,7 +44,6 @@ func TestAclDescribeRequestV0(t *testing.T) {
 }
 
 func TestAclDescribeRequestV1(t *testing.T) {
-	t.Parallel()
 	resourcename := "topic"
 	principal := "principal"
 	host := "host"
diff --git a/acl_describe_response_test.go b/acl_describe_response_test.go
index 3147c4bc8..f0652cfee 100644
--- a/acl_describe_response_test.go
+++ b/acl_describe_response_test.go
@@ -20,7 +20,6 @@ var aclDescribeResponseError = []byte{
 }
 
 func TestAclDescribeResponse(t *testing.T) {
-	t.Parallel()
 	errmsg := "error"
 	resp := &DescribeAclsResponse{
 		ThrottleTime: 100 * time.Millisecond,
diff --git a/acl_types_test.go b/acl_types_test.go
index 65dc3a84c..0b5247a14 100644
--- a/acl_types_test.go
+++ b/acl_types_test.go
@@ -5,7 +5,6 @@ import (
 )
 
 func TestAclOperationTextMarshal(t *testing.T) {
-	t.Parallel()
 	for i := AclOperationUnknown; i <= AclOperationIdempotentWrite; i++ {
 		text, err := i.MarshalText()
 		if err != nil {
@@ -23,7 +22,6 @@ func TestAclOperationTextMarshal(t *testing.T) {
 }
 
 func TestAclPermissionTypeTextMarshal(t *testing.T) {
-	t.Parallel()
 	for i := AclPermissionUnknown; i <= AclPermissionAllow; i++ {
 		text, err := i.MarshalText()
 		if err != nil {
@@ -41,7 +39,6 @@ func TestAclPermissionTypeTextMarshal(t *testing.T) {
 }
 
 func TestAclResourceTypeTextMarshal(t *testing.T) {
-	t.Parallel()
 	for i := AclResourceUnknown; i <= AclResourceTransactionalID; i++ {
 		text, err := i.MarshalText()
 		if err != nil {
@@ -59,7 +56,6 @@ func TestAclResourceTypeTextMarshal(t *testing.T) {
 }
 
 func TestAclResourcePatternTypeTextMarshal(t *testing.T) {
-	t.Parallel()
 	for i := AclPatternUnknown; i <= AclPatternPrefixed; i++ {
 		text, err := i.MarshalText()
 		if err != nil {
diff --git a/add_offsets_to_txn_request_test.go b/add_offsets_to_txn_request_test.go
index c3bb3cc12..471d085cd 100644
--- a/add_offsets_to_txn_request_test.go
+++ b/add_offsets_to_txn_request_test.go
@@ -10,7 +10,6 @@ var addOffsetsToTxnRequest = []byte{
 }
 
 func TestAddOffsetsToTxnRequest(t *testing.T) {
-	t.Parallel()
 	req := &AddOffsetsToTxnRequest{
 		TransactionalID: "txn",
 		ProducerID:      8000,
diff --git a/add_offsets_to_txn_response_test.go b/add_offsets_to_txn_response_test.go
index 1c2d47b37..d1730cee4 100644
--- a/add_offsets_to_txn_response_test.go
+++ b/add_offsets_to_txn_response_test.go
@@ -11,7 +11,6 @@ var addOffsetsToTxnResponse = []byte{
 }
 
 func TestAddOffsetsToTxnResponse(t *testing.T) {
-	t.Parallel()
 	resp := &AddOffsetsToTxnResponse{
 		ThrottleTime: 100 * time.Millisecond,
 		Err:          ErrInvalidProducerEpoch,
diff --git a/add_partitions_to_txn_request_test.go b/add_partitions_to_txn_request_test.go
index 59ae0a5d5..f60a88695 100644
--- a/add_partitions_to_txn_request_test.go
+++ b/add_partitions_to_txn_request_test.go
@@ -12,7 +12,6 @@ var addPartitionsToTxnRequest = []byte{
 }
 
 func TestAddPartitionsToTxnRequest(t *testing.T) {
-	t.Parallel()
 	req := &AddPartitionsToTxnRequest{
 		TransactionalID: "txn",
 		ProducerID:      8000,
diff --git a/add_partitions_to_txn_response_test.go b/add_partitions_to_txn_response_test.go
index ed4902011..b3635e58d 100644
--- a/add_partitions_to_txn_response_test.go
+++ b/add_partitions_to_txn_response_test.go
@@ -15,7 +15,6 @@ var addPartitionsToTxnResponse = []byte{
 }
 
 func TestAddPartitionsToTxnResponse(t *testing.T) {
-	t.Parallel()
 	resp := &AddPartitionsToTxnResponse{
 		ThrottleTime: 100 * time.Millisecond,
 		Errors: map[string][]*PartitionError{
diff --git a/admin_test.go b/admin_test.go
index 9441142d7..57b59c374 100644
--- a/admin_test.go
+++ b/admin_test.go
@@ -7,7 +7,6 @@ import (
 )
 
 func TestClusterAdmin(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -31,7 +30,6 @@ func TestClusterAdmin(t *testing.T) {
 }
 
 func TestClusterAdminInvalidController(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -53,7 +51,6 @@ func TestClusterAdminInvalidController(t *testing.T) {
 }
 
 func TestClusterAdminCreateTopic(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -82,7 +79,6 @@ func TestClusterAdminCreateTopic(t *testing.T) {
 }
 
 func TestClusterAdminCreateTopicWithInvalidTopicDetail(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -111,7 +107,6 @@ func TestClusterAdminCreateTopicWithInvalidTopicDetail(t *testing.T) {
 }
 
 func TestClusterAdminCreateTopicWithoutAuthorization(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -142,7 +137,6 @@ func TestClusterAdminCreateTopicWithoutAuthorization(t *testing.T) {
 }
 
 func TestClusterAdminListTopics(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -194,7 +188,6 @@ func TestClusterAdminListTopics(t *testing.T) {
 }
 
 func TestClusterAdminDeleteTopic(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -224,7 +217,6 @@ func TestClusterAdminDeleteTopic(t *testing.T) {
 }
 
 func TestClusterAdminDeleteEmptyTopic(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -254,7 +246,6 @@ func TestClusterAdminDeleteEmptyTopic(t *testing.T) {
 }
 
 func TestClusterAdminCreatePartitions(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -284,7 +275,6 @@ func TestClusterAdminCreatePartitions(t *testing.T) {
 }
 
 func TestClusterAdminCreatePartitionsWithDiffVersion(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -314,7 +304,6 @@ func TestClusterAdminCreatePartitionsWithDiffVersion(t *testing.T) {
 }
 
 func TestClusterAdminCreatePartitionsWithoutAuthorization(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -344,7 +333,6 @@ func TestClusterAdminCreatePartitionsWithoutAuthorization(t *testing.T) {
 }
 
 func TestClusterAdminAlterPartitionReassignments(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -385,7 +373,6 @@ func TestClusterAdminAlterPartitionReassignments(t *testing.T) {
 }
 
 func TestClusterAdminAlterPartitionReassignmentsWithDiffVersion(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -425,7 +412,6 @@ func TestClusterAdminAlterPartitionReassignmentsWithDiffVersion(t *testing.T) {
 }
 
 func TestClusterAdminListPartitionReassignments(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -473,7 +459,6 @@ func TestClusterAdminListPartitionReassignments(t *testing.T) {
 }
 
 func TestClusterAdminListPartitionReassignmentsWithDiffVersion(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -513,7 +498,6 @@ func TestClusterAdminListPartitionReassignmentsWithDiffVersion(t *testing.T) {
 }
 
 func TestClusterAdminDeleteRecords(t *testing.T) {
-	t.Parallel()
 	topicName := "my_topic"
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
@@ -559,7 +543,6 @@ func TestClusterAdminDeleteRecords(t *testing.T) {
 }
 
 func TestClusterAdminDeleteRecordsWithInCorrectBroker(t *testing.T) {
-	t.Parallel()
 	topicName := "my_topic"
 	seedBroker := NewMockBroker(t, 1)
 	secondBroker := NewMockBroker(t, 2)
@@ -611,7 +594,6 @@ func TestClusterAdminDeleteRecordsWithInCorrectBroker(t *testing.T) {
 }
 
 func TestClusterAdminDeleteRecordsWithDiffVersion(t *testing.T) {
-	t.Parallel()
 	topicName := "my_topic"
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
@@ -661,7 +643,6 @@ func TestClusterAdminDeleteRecordsWithDiffVersion(t *testing.T) {
 }
 
 func TestClusterAdminDescribeConfig(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -728,7 +709,6 @@ func TestClusterAdminDescribeConfig(t *testing.T) {
 }
 
 func TestClusterAdminDescribeConfigWithErrorCode(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -764,7 +744,6 @@ func TestClusterAdminDescribeConfigWithErrorCode(t *testing.T) {
 // TestClusterAdminDescribeBrokerConfig ensures that a describe broker config
 // is sent to the broker in the resource struct, _not_ the controller
 func TestClusterAdminDescribeBrokerConfig(t *testing.T) {
-	t.Parallel()
 	controllerBroker := NewMockBroker(t, 1)
 	defer controllerBroker.Close()
 	configBroker := NewMockBroker(t, 2)
@@ -815,7 +794,6 @@ func TestClusterAdminDescribeBrokerConfig(t *testing.T) {
 }
 
 func TestClusterAdminAlterConfig(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -849,7 +827,6 @@ func TestClusterAdminAlterConfig(t *testing.T) {
 }
 
 func TestClusterAdminAlterConfigWithErrorCode(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -881,7 +858,6 @@ func TestClusterAdminAlterConfigWithErrorCode(t *testing.T) {
 }
 
 func TestClusterAdminAlterBrokerConfig(t *testing.T) {
-	t.Parallel()
 	controllerBroker := NewMockBroker(t, 1)
 	defer controllerBroker.Close()
 	configBroker := NewMockBroker(t, 2)
@@ -936,7 +912,6 @@ func TestClusterAdminAlterBrokerConfig(t *testing.T) {
 }
 
 func TestClusterAdminIncrementalAlterConfig(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -978,7 +953,6 @@ func TestClusterAdminIncrementalAlterConfig(t *testing.T) {
 }
 
 func TestClusterAdminIncrementalAlterConfigWithErrorCode(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1018,7 +992,6 @@ func TestClusterAdminIncrementalAlterConfigWithErrorCode(t *testing.T) {
 }
 
 func TestClusterAdminIncrementalAlterBrokerConfig(t *testing.T) {
-	t.Parallel()
 	controllerBroker := NewMockBroker(t, 1)
 	defer controllerBroker.Close()
 	configBroker := NewMockBroker(t, 2)
@@ -1081,7 +1054,6 @@ func TestClusterAdminIncrementalAlterBrokerConfig(t *testing.T) {
 }
 
 func TestClusterAdminCreateAcl(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1114,7 +1086,6 @@ func TestClusterAdminCreateAcl(t *testing.T) {
 }
 
 func TestClusterAdminListAcls(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1162,7 +1133,6 @@ func TestClusterAdminListAcls(t *testing.T) {
 }
 
 func TestClusterAdminDeleteAcl(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1199,7 +1169,6 @@ func TestClusterAdminDeleteAcl(t *testing.T) {
 }
 
 func TestDescribeTopic(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1238,7 +1207,6 @@ func TestDescribeTopic(t *testing.T) {
 }
 
 func TestDescribeTopicWithVersion0_11(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1277,7 +1245,6 @@ func TestDescribeTopicWithVersion0_11(t *testing.T) {
 }
 
 func TestDescribeConsumerGroup(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1321,7 +1288,6 @@ func TestDescribeConsumerGroup(t *testing.T) {
 }
 
 func TestListConsumerGroups(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1367,7 +1333,6 @@ func TestListConsumerGroups(t *testing.T) {
 }
 
 func TestListConsumerGroupsMultiBroker(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1432,7 +1397,6 @@ func TestListConsumerGroupsMultiBroker(t *testing.T) {
 }
 
 func TestListConsumerGroupOffsets(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1480,7 +1444,6 @@ func TestListConsumerGroupOffsets(t *testing.T) {
 }
 
 func TestDeleteConsumerGroup(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1510,7 +1473,6 @@ func TestDeleteConsumerGroup(t *testing.T) {
 }
 
 func TestDeleteOffset(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
@@ -1563,7 +1525,6 @@ func TestDeleteOffset(t *testing.T) {
 // TestRefreshMetaDataWithDifferentController ensures that the cached
 // controller can be forcibly updated from Metadata by the admin client
 func TestRefreshMetaDataWithDifferentController(t *testing.T) {
-	t.Parallel()
 	seedBroker1 := NewMockBroker(t, 1)
 	seedBroker2 := NewMockBroker(t, 2)
 	defer seedBroker1.Close()
@@ -1610,7 +1571,6 @@ func TestRefreshMetaDataWithDifferentController(t *testing.T) {
 }
 
 func TestDescribeLogDirs(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	defer seedBroker.Close()
 
diff --git a/alter_client_quotas_request_test.go b/alter_client_quotas_request_test.go
index 404f69f92..46f92b9cb 100644
--- a/alter_client_quotas_request_test.go
+++ b/alter_client_quotas_request_test.go
@@ -63,7 +63,6 @@ var (
 )
 
 func TestAlterClientQuotasRequest(t *testing.T) {
-	t.Parallel()
 	// default user
 	defaultUserComponent := QuotaEntityComponent{
 		EntityType: QuotaEntityUser,
diff --git a/alter_client_quotas_response_test.go b/alter_client_quotas_response_test.go
index a767cf984..40efeb547 100644
--- a/alter_client_quotas_response_test.go
+++ b/alter_client_quotas_response_test.go
@@ -40,7 +40,6 @@ var (
 )
 
 func TestAlterClientQuotasResponse(t *testing.T) {
-	t.Parallel()
 	// default user
 	defaultUserComponent := QuotaEntityComponent{
 		EntityType: QuotaEntityUser,
diff --git a/alter_configs_request_test.go b/alter_configs_request_test.go
index 97e2679bb..e612244c6 100644
--- a/alter_configs_request_test.go
+++ b/alter_configs_request_test.go
@@ -41,7 +41,6 @@ var (
 )
 
 func TestAlterConfigsRequest(t *testing.T) {
-	t.Parallel()
 	var request *AlterConfigsRequest
 
 	request = &AlterConfigsRequest{
diff --git a/alter_configs_response_test.go b/alter_configs_response_test.go
index ca8afbe9e..62cd5991f 100644
--- a/alter_configs_response_test.go
+++ b/alter_configs_response_test.go
@@ -21,7 +21,6 @@ var (
 )
 
 func TestAlterConfigsResponse(t *testing.T) {
-	t.Parallel()
 	var response *AlterConfigsResponse
 
 	response = &AlterConfigsResponse{
diff --git a/alter_partition_reassignments_request_test.go b/alter_partition_reassignments_request_test.go
index e60d61096..c917f2d79 100644
--- a/alter_partition_reassignments_request_test.go
+++ b/alter_partition_reassignments_request_test.go
@@ -33,7 +33,6 @@ var (
 )
 
 func TestAlterPartitionReassignmentRequest(t *testing.T) {
-	t.Parallel()
 	var request *AlterPartitionReassignmentsRequest
 
 	request = &AlterPartitionReassignmentsRequest{
diff --git a/alter_partition_reassignments_response_test.go b/alter_partition_reassignments_response_test.go
index 4a513c1f3..8c39ef6ce 100644
--- a/alter_partition_reassignments_response_test.go
+++ b/alter_partition_reassignments_response_test.go
@@ -26,7 +26,6 @@ var (
 )
 
 func TestAlterPartitionReassignmentResponse(t *testing.T) {
-	t.Parallel()
 	var response *AlterPartitionReassignmentsResponse = &AlterPartitionReassignmentsResponse{
 		ThrottleTimeMs: int32(10000),
 		Version:        int16(0),
diff --git a/alter_user_scram_credentials_request_test.go b/alter_user_scram_credentials_request_test.go
index 8ba7f9f20..6fe881906 100644
--- a/alter_user_scram_credentials_request_test.go
+++ b/alter_user_scram_credentials_request_test.go
@@ -31,7 +31,6 @@ var (
 )
 
 func TestAlterUserScramCredentialsRequest(t *testing.T) {
-	t.Parallel()
 	request := &AlterUserScramCredentialsRequest{
 		Version:    0,
 		Deletions:  []AlterUserScramCredentialsDelete{},
diff --git a/alter_user_scram_credentials_response_test.go b/alter_user_scram_credentials_response_test.go
index 31607051f..983500639 100644
--- a/alter_user_scram_credentials_response_test.go
+++ b/alter_user_scram_credentials_response_test.go
@@ -23,7 +23,6 @@ var (
 )
 
 func TestAlterUserScramCredentialsResponse(t *testing.T) {
-	t.Parallel()
 	response := &AlterUserScramCredentialsResponse{
 		Version:      0,
 		ThrottleTime: time.Second * 3,
diff --git a/api_versions_request_test.go b/api_versions_request_test.go
index 15b84f346..371ac9602 100644
--- a/api_versions_request_test.go
+++ b/api_versions_request_test.go
@@ -13,13 +13,11 @@ var (
 )
 
 func TestApiVersionsRequest(t *testing.T) {
-	t.Parallel()
 	request := new(ApiVersionsRequest)
 	testRequest(t, "basic", request, apiVersionRequest)
 }
 
 func TestApiVersionsRequestV3(t *testing.T) {
-	t.Parallel()
 	request := new(ApiVersionsRequest)
 	request.Version = 3
 	request.ClientSoftwareName = "sarama"
diff --git a/api_versions_response_test.go b/api_versions_response_test.go
index 6574c8317..26e0bf2a4 100644
--- a/api_versions_response_test.go
+++ b/api_versions_response_test.go
@@ -24,7 +24,6 @@ var (
 )
 
 func TestApiVersionsResponse(t *testing.T) {
-	t.Parallel()
 	response := new(ApiVersionsResponse)
 	testVersionDecodable(t, "no error", response, apiVersionResponse, 0)
 	if response.ErrorCode != int16(ErrNoError) {
@@ -42,7 +41,6 @@ func TestApiVersionsResponse(t *testing.T) {
 }
 
 func TestApiVersionsResponseV3(t *testing.T) {
-	t.Parallel()
 	response := new(ApiVersionsResponse)
 	response.Version = 3
 	testVersionDecodable(t, "no error", response, apiVersionResponseV3, 3)
diff --git a/async_producer_test.go b/async_producer_test.go
index 60810b30a..f3b848119 100644
--- a/async_producer_test.go
+++ b/async_producer_test.go
@@ -100,7 +100,6 @@ func (f flakyEncoder) Encode() ([]byte, error) {
 }
 
 func TestAsyncProducer(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -150,7 +149,6 @@ done:
 }
 
 func TestAsyncProducerMultipleFlushes(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -186,7 +184,6 @@ func TestAsyncProducerMultipleFlushes(t *testing.T) {
 }
 
 func TestAsyncProducerMultipleBrokers(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader0 := NewMockBroker(t, 2)
 	leader1 := NewMockBroker(t, 3)
@@ -227,7 +224,6 @@ func TestAsyncProducerMultipleBrokers(t *testing.T) {
 }
 
 func TestAsyncProducerCustomPartitioner(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -270,7 +266,6 @@ func TestAsyncProducerCustomPartitioner(t *testing.T) {
 }
 
 func TestAsyncProducerFailureRetry(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader1 := NewMockBroker(t, 2)
 	leader2 := NewMockBroker(t, 3)
@@ -319,7 +314,6 @@ func TestAsyncProducerFailureRetry(t *testing.T) {
 }
 
 func TestAsyncProducerRecoveryWithRetriesDisabled(t *testing.T) {
-	t.Parallel()
 	tt := func(t *testing.T, kErr KError) {
 		seedBroker := NewMockBroker(t, 0)
 		broker1 := NewMockBroker(t, 1)
@@ -397,18 +391,15 @@ func TestAsyncProducerRecoveryWithRetriesDisabled(t *testing.T) {
 	}
 
 	t.Run("retriable error", func(t *testing.T) {
-		t.Parallel()
 		tt(t, ErrNotLeaderForPartition)
 	})
 
 	t.Run("non-retriable error", func(t *testing.T) {
-		t.Parallel()
 		tt(t, ErrNotController)
 	})
 }
 
 func TestAsyncProducerEncoderFailures(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -447,7 +438,6 @@ func TestAsyncProducerEncoderFailures(t *testing.T) {
 // If a Kafka broker becomes unavailable and then returns back in service, then
 // producer reconnects to it and continues sending messages.
 func TestAsyncProducerBrokerBounce(t *testing.T) {
-	t.Parallel()
 	// Given
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
@@ -489,7 +479,6 @@ func TestAsyncProducerBrokerBounce(t *testing.T) {
 }
 
 func TestAsyncProducerBrokerBounceWithStaleMetadata(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader1 := NewMockBroker(t, 2)
 	leader2 := NewMockBroker(t, 3)
@@ -533,7 +522,6 @@ func TestAsyncProducerBrokerBounceWithStaleMetadata(t *testing.T) {
 }
 
 func TestAsyncProducerMultipleRetries(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader1 := NewMockBroker(t, 2)
 	leader2 := NewMockBroker(t, 3)
@@ -590,7 +578,6 @@ func TestAsyncProducerMultipleRetries(t *testing.T) {
 }
 
 func TestAsyncProducerMultipleRetriesWithBackoffFunc(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader1 := NewMockBroker(t, 2)
 	leader2 := NewMockBroker(t, 3)
@@ -659,7 +646,6 @@ func TestAsyncProducerMultipleRetriesWithBackoffFunc(t *testing.T) {
 
 // https://github.com/Shopify/sarama/issues/2129
 func TestAsyncProducerMultipleRetriesWithConcurrentRequests(t *testing.T) {
-	t.Parallel()
 	//Logger = log.New(os.Stdout, "[sarama] ", log.LstdFlags)
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
@@ -708,7 +694,6 @@ func TestAsyncProducerMultipleRetriesWithConcurrentRequests(t *testing.T) {
 }
 
 func TestAsyncProducerOutOfRetries(t *testing.T) {
-	t.Parallel()
 	t.Skip("Enable once bug #294 is fixed.")
 
 	seedBroker := NewMockBroker(t, 1)
@@ -766,7 +751,6 @@ func TestAsyncProducerOutOfRetries(t *testing.T) {
 }
 
 func TestAsyncProducerRetryWithReferenceOpen(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 	leaderAddr := leader.Addr()
@@ -824,7 +808,6 @@ func TestAsyncProducerRetryWithReferenceOpen(t *testing.T) {
 }
 
 func TestAsyncProducerFlusherRetryCondition(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -891,7 +874,6 @@ func TestAsyncProducerFlusherRetryCondition(t *testing.T) {
 }
 
 func TestAsyncProducerRetryShutdown(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -941,7 +923,6 @@ func TestAsyncProducerRetryShutdown(t *testing.T) {
 }
 
 func TestAsyncProducerNoReturns(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -982,7 +963,6 @@ func TestAsyncProducerNoReturns(t *testing.T) {
 }
 
 func TestAsyncProducerIdempotentGoldenPath(t *testing.T) {
-	t.Parallel()
 	broker := NewMockBroker(t, 1)
 
 	metadataResponse := &MetadataResponse{
@@ -1031,7 +1011,6 @@ func TestAsyncProducerIdempotentGoldenPath(t *testing.T) {
 }
 
 func TestAsyncProducerIdempotentRetryCheckBatch(t *testing.T) {
-	t.Parallel()
 	// Logger = log.New(os.Stderr, "", log.LstdFlags)
 	tests := []struct {
 		name           string
@@ -1179,7 +1158,6 @@ func TestAsyncProducerIdempotentRetryCheckBatch(t *testing.T) {
 }
 
 func TestAsyncProducerIdempotentErrorOnOutOfSeq(t *testing.T) {
-	t.Parallel()
 	broker := NewMockBroker(t, 1)
 
 	metadataResponse := &MetadataResponse{
@@ -1229,7 +1207,6 @@ func TestAsyncProducerIdempotentErrorOnOutOfSeq(t *testing.T) {
 }
 
 func TestAsyncProducerIdempotentEpochRollover(t *testing.T) {
-	t.Parallel()
 	broker := NewMockBroker(t, 1)
 	defer broker.Close()
 
@@ -1397,7 +1374,6 @@ func testProducerInterceptor(
 }
 
 func TestAsyncProducerInterceptors(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		name          string
 		interceptors  []ProducerInterceptor
@@ -1451,7 +1427,6 @@ func TestAsyncProducerInterceptors(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			testProducerInterceptor(t, tt.interceptors, tt.expectationFn)
 		})
 	}
diff --git a/balance_strategy_test.go b/balance_strategy_test.go
index 4da317cfc..44aee3ec0 100644
--- a/balance_strategy_test.go
+++ b/balance_strategy_test.go
@@ -12,7 +12,6 @@ import (
 )
 
 func TestBalanceStrategyRange(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		members  map[string][]string
 		topics   map[string][]int32
@@ -65,7 +64,6 @@ func TestBalanceStrategyRange(t *testing.T) {
 }
 
 func TestBalanceStrategyRangeAssignmentData(t *testing.T) {
-	t.Parallel()
 	strategy := BalanceStrategyRange
 
 	members := make(map[string]ConsumerGroupMemberMetadata, 2)
@@ -86,7 +84,6 @@ func TestBalanceStrategyRangeAssignmentData(t *testing.T) {
 }
 
 func TestBalanceStrategyRoundRobin(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		members  map[string][]string
 		topics   map[string][]int32
@@ -169,7 +166,6 @@ func TestBalanceStrategyRoundRobin(t *testing.T) {
 }
 
 func Test_deserializeTopicPartitionAssignment(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		userDataBytes []byte
 	}
@@ -243,7 +239,6 @@ func Test_deserializeTopicPartitionAssignment(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			got, err := deserializeTopicPartitionAssignment(tt.args.userDataBytes)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("deserializeTopicPartitionAssignment() error = %v, wantErr %v", err, tt.wantErr)
@@ -257,7 +252,6 @@ func Test_deserializeTopicPartitionAssignment(t *testing.T) {
 }
 
 func TestBalanceStrategyRoundRobinAssignmentData(t *testing.T) {
-	t.Parallel()
 	strategy := BalanceStrategyRoundRobin
 
 	members := make(map[string]ConsumerGroupMemberMetadata, 2)
@@ -278,7 +272,6 @@ func TestBalanceStrategyRoundRobinAssignmentData(t *testing.T) {
 }
 
 func Test_prepopulateCurrentAssignments(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		members map[string]ConsumerGroupMemberMetadata
 	}
@@ -418,7 +411,6 @@ func Test_prepopulateCurrentAssignments(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			_, gotPrevAssignments, err := prepopulateCurrentAssignments(tt.args.members)
 
 			if (err != nil) != tt.wantErr {
@@ -433,7 +425,6 @@ func Test_prepopulateCurrentAssignments(t *testing.T) {
 }
 
 func Test_areSubscriptionsIdentical(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		partition2AllPotentialConsumers map[topicPartitionAssignment][]string
 		consumer2AllPotentialPartitions map[string][]topicPartitionAssignment
@@ -551,7 +542,6 @@ func Test_areSubscriptionsIdentical(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			if got := areSubscriptionsIdentical(tt.args.partition2AllPotentialConsumers, tt.args.consumer2AllPotentialPartitions); got != tt.want {
 				t.Errorf("areSubscriptionsIdentical() = %v, want %v", got, tt.want)
 			}
@@ -560,7 +550,6 @@ func Test_areSubscriptionsIdentical(t *testing.T) {
 }
 
 func Test_sortMemberIDsByPartitionAssignments(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		assignments map[string][]topicPartitionAssignment
 	}
@@ -610,7 +599,6 @@ func Test_sortMemberIDsByPartitionAssignments(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			if got := sortMemberIDsByPartitionAssignments(tt.args.assignments); !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("sortMemberIDsByPartitionAssignments() = %v, want %v", got, tt.want)
 			}
@@ -619,7 +607,6 @@ func Test_sortMemberIDsByPartitionAssignments(t *testing.T) {
 }
 
 func Test_sortPartitions(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		currentAssignment                          map[string][]topicPartitionAssignment
 		partitionsWithADifferentPreviousAssignment map[topicPartitionAssignment]consumerGenerationPair
@@ -723,7 +710,6 @@ func Test_sortPartitions(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			got := sortPartitions(tt.args.currentAssignment, tt.args.partitionsWithADifferentPreviousAssignment, tt.args.isFreshAssignment, tt.args.partition2AllPotentialConsumers, tt.args.consumer2AllPotentialPartitions)
 			if tt.want != nil && !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("sortPartitions() = %v, want %v", got, tt.want)
@@ -733,7 +719,6 @@ func Test_sortPartitions(t *testing.T) {
 }
 
 func Test_filterAssignedPartitions(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		currentAssignment               map[string][]topicPartitionAssignment
 		partition2AllPotentialConsumers map[topicPartitionAssignment][]string
@@ -799,7 +784,6 @@ func Test_filterAssignedPartitions(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			if got := filterAssignedPartitions(tt.args.currentAssignment, tt.args.partition2AllPotentialConsumers); !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("filterAssignedPartitions() = %v, want %v", got, tt.want)
 			}
@@ -808,7 +792,6 @@ func Test_filterAssignedPartitions(t *testing.T) {
 }
 
 func Test_canConsumerParticipateInReassignment(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		memberID                        string
 		currentAssignment               map[string][]topicPartitionAssignment
@@ -903,7 +886,6 @@ func Test_canConsumerParticipateInReassignment(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			if got := canConsumerParticipateInReassignment(tt.args.memberID, tt.args.currentAssignment, tt.args.consumer2AllPotentialPartitions, tt.args.partition2AllPotentialConsumers); got != tt.want {
 				t.Errorf("canConsumerParticipateInReassignment() = %v, want %v", got, tt.want)
 			}
@@ -912,7 +894,6 @@ func Test_canConsumerParticipateInReassignment(t *testing.T) {
 }
 
 func Test_removeTopicPartitionFromMemberAssignments(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		assignments []topicPartitionAssignment
 		topic       topicPartitionAssignment
@@ -979,7 +960,6 @@ func Test_removeTopicPartitionFromMemberAssignments(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			if got := removeTopicPartitionFromMemberAssignments(tt.args.assignments, tt.args.topic); !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("removeTopicPartitionFromMemberAssignments() = %v, want %v", got, tt.want)
 			}
@@ -988,7 +968,6 @@ func Test_removeTopicPartitionFromMemberAssignments(t *testing.T) {
 }
 
 func Test_assignPartition(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		partition                       topicPartitionAssignment
 		sortedCurrentSubscriptions      []string
@@ -1100,7 +1079,6 @@ func Test_assignPartition(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			if got := assignPartition(tt.args.partition, tt.args.sortedCurrentSubscriptions, tt.args.currentAssignment, tt.args.consumer2AllPotentialPartitions, tt.args.currentPartitionConsumer); !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("assignPartition() = %v, want %v", got, tt.want)
 			}
@@ -1115,7 +1093,6 @@ func Test_assignPartition(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		members map[string]ConsumerGroupMemberMetadata
 		topics  map[string][]int32
@@ -1337,7 +1314,6 @@ func Test_stickyBalanceStrategy_Plan(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			s := &stickyBalanceStrategy{}
 			plan, err := s.Plan(tt.args.members, tt.args.topics)
 			verifyPlanIsBalancedAndSticky(t, s, tt.args.members, plan, err)
@@ -1347,7 +1323,6 @@ func Test_stickyBalanceStrategy_Plan(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_KIP54_ExampleOne(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	// PLAN 1
@@ -1388,7 +1363,6 @@ func Test_stickyBalanceStrategy_Plan_KIP54_ExampleOne(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_KIP54_ExampleTwo(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	// PLAN 1
@@ -1433,7 +1407,6 @@ func Test_stickyBalanceStrategy_Plan_KIP54_ExampleTwo(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_KIP54_ExampleThree(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 	topicNames := []string{"topic1", "topic2"}
 
@@ -1471,7 +1444,6 @@ func Test_stickyBalanceStrategy_Plan_KIP54_ExampleThree(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_AddRemoveConsumerOneTopic(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	// PLAN 1
@@ -1508,7 +1480,6 @@ func Test_stickyBalanceStrategy_Plan_AddRemoveConsumerOneTopic(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_PoorRoundRobinAssignmentScenario(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	// PLAN 1
@@ -1540,7 +1511,6 @@ func Test_stickyBalanceStrategy_Plan_PoorRoundRobinAssignmentScenario(t *testing
 }
 
 func Test_stickyBalanceStrategy_Plan_AddRemoveTopicTwoConsumers(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	// PLAN 1
@@ -1591,7 +1561,6 @@ func Test_stickyBalanceStrategy_Plan_AddRemoveTopicTwoConsumers(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_ReassignmentAfterOneConsumerLeaves(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	// PLAN 1
@@ -1632,7 +1601,6 @@ func Test_stickyBalanceStrategy_Plan_ReassignmentAfterOneConsumerLeaves(t *testi
 }
 
 func Test_stickyBalanceStrategy_Plan_ReassignmentAfterOneConsumerAdded(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	// PLAN 1
@@ -1657,7 +1625,6 @@ func Test_stickyBalanceStrategy_Plan_ReassignmentAfterOneConsumerAdded(t *testin
 }
 
 func Test_stickyBalanceStrategy_Plan_SameSubscriptions(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	// PLAN 1
@@ -1695,7 +1662,6 @@ func Test_stickyBalanceStrategy_Plan_SameSubscriptions(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_LargeAssignmentWithMultipleConsumersLeaving(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 
@@ -1736,7 +1702,6 @@ func Test_stickyBalanceStrategy_Plan_LargeAssignmentWithMultipleConsumersLeaving
 }
 
 func Test_stickyBalanceStrategy_Plan_NewSubscription(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	members := make(map[string]ConsumerGroupMemberMetadata, 20)
@@ -1766,7 +1731,6 @@ func Test_stickyBalanceStrategy_Plan_NewSubscription(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_ReassignmentWithRandomSubscriptionsAndChanges(t *testing.T) {
-	t.Parallel()
 	r := rand.New(rand.NewSource(time.Now().UnixNano()))
 
 	minNumConsumers := 20
@@ -1816,7 +1780,6 @@ func Test_stickyBalanceStrategy_Plan_ReassignmentWithRandomSubscriptionsAndChang
 }
 
 func Test_stickyBalanceStrategy_Plan_MoveExistingAssignments(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := make(map[string][]int32, 6)
@@ -1842,7 +1805,6 @@ func Test_stickyBalanceStrategy_Plan_MoveExistingAssignments(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_Stickiness(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := map[string][]int32{"topic1": {0, 1, 2}}
@@ -1871,7 +1833,6 @@ func Test_stickyBalanceStrategy_Plan_Stickiness(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_AssignmentUpdatedForDeletedTopic(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := make(map[string][]int32, 2)
@@ -1894,7 +1855,6 @@ func Test_stickyBalanceStrategy_Plan_AssignmentUpdatedForDeletedTopic(t *testing
 }
 
 func Test_stickyBalanceStrategy_Plan_NoExceptionRaisedWhenOnlySubscribedTopicDeleted(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := map[string][]int32{"topic1": {0, 1, 2}}
@@ -1923,7 +1883,6 @@ func Test_stickyBalanceStrategy_Plan_NoExceptionRaisedWhenOnlySubscribedTopicDel
 }
 
 func Test_stickyBalanceStrategy_Plan_AssignmentWithMultipleGenerations1(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := map[string][]int32{"topic1": {0, 1, 2, 3, 4, 5}}
@@ -1974,7 +1933,6 @@ func Test_stickyBalanceStrategy_Plan_AssignmentWithMultipleGenerations1(t *testi
 }
 
 func Test_stickyBalanceStrategy_Plan_AssignmentWithMultipleGenerations2(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := map[string][]int32{"topic1": {0, 1, 2, 3, 4, 5}}
@@ -2021,7 +1979,6 @@ func Test_stickyBalanceStrategy_Plan_AssignmentWithMultipleGenerations2(t *testi
 }
 
 func Test_stickyBalanceStrategy_Plan_AssignmentWithConflictingPreviousGenerations(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := map[string][]int32{"topic1": {0, 1, 2, 3, 4, 5}}
@@ -2045,7 +2002,6 @@ func Test_stickyBalanceStrategy_Plan_AssignmentWithConflictingPreviousGeneration
 }
 
 func Test_stickyBalanceStrategy_Plan_SchemaBackwardCompatibility(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := map[string][]int32{"topic1": {0, 1, 2}}
@@ -2066,7 +2022,6 @@ func Test_stickyBalanceStrategy_Plan_SchemaBackwardCompatibility(t *testing.T) {
 }
 
 func Test_stickyBalanceStrategy_Plan_ConflictingPreviousAssignments(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	topics := map[string][]int32{"topic1": {0, 1}}
@@ -2086,7 +2041,6 @@ func Test_stickyBalanceStrategy_Plan_ConflictingPreviousAssignments(t *testing.T
 }
 
 func Test_stickyBalanceStrategy_Plan_AssignmentData(t *testing.T) {
-	t.Parallel()
 	s := &stickyBalanceStrategy{}
 
 	members := make(map[string]ConsumerGroupMemberMetadata, 2)
@@ -2376,7 +2330,6 @@ func getRandomSublist(r *rand.Rand, s []string) []string {
 }
 
 func Test_sortPartitionsByPotentialConsumerAssignments(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		partition2AllPotentialConsumers map[topicPartitionAssignment][]string
 	}
@@ -2456,7 +2409,6 @@ func Test_sortPartitionsByPotentialConsumerAssignments(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			if got := sortPartitionsByPotentialConsumerAssignments(tt.args.partition2AllPotentialConsumers); !reflect.DeepEqual(got, tt.want) {
 				t.Errorf("sortPartitionsByPotentialConsumerAssignments() = %v, want %v", got, tt.want)
 			}
diff --git a/broker_test.go b/broker_test.go
index 909995bf9..0573e4627 100644
--- a/broker_test.go
+++ b/broker_test.go
@@ -52,7 +52,6 @@ type brokerMetrics struct {
 }
 
 func TestBrokerAccessors(t *testing.T) {
-	t.Parallel()
 	broker := NewBroker("abc:123")
 
 	if broker.ID() != -1 {
@@ -112,11 +111,9 @@ func (p produceResponsePromise) Get() (*ProduceResponse, error) {
 }
 
 func TestSimpleBrokerCommunication(t *testing.T) {
-	t.Parallel()
 	for _, tt := range brokerTestTable {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			Logger.Printf("Testing broker communication for %s", tt.name)
 			mb := NewMockBroker(t, 0)
 			mb.Returns(&mockEncoder{tt.response})
@@ -155,11 +152,9 @@ func TestSimpleBrokerCommunication(t *testing.T) {
 }
 
 func TestBrokerFailedRequest(t *testing.T) {
-	t.Parallel()
 	for _, tt := range brokerFailedReqTestTable {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			t.Logf("Testing broker communication for %s", tt.name)
 			mb := NewMockBroker(t, 0)
 			if !tt.stopBroker {
@@ -217,7 +212,6 @@ func newTokenProvider(token *AccessToken, err error) *TokenProvider {
 }
 
 func TestSASLOAuthBearer(t *testing.T) {
-	t.Parallel()
 	testTable := []struct {
 		name                      string
 		authidentity              string
@@ -290,7 +284,6 @@ func TestSASLOAuthBearer(t *testing.T) {
 	for i, test := range testTable {
 		test := test
 		t.Run(test.name, func(t *testing.T) {
-			t.Parallel()
 			// mockBroker mocks underlying network logic and broker responses
 			mockBroker := NewMockBroker(t, 0)
 
@@ -373,7 +366,6 @@ func (m *MockSCRAMClient) Done() bool {
 var _ SCRAMClient = &MockSCRAMClient{}
 
 func TestSASLSCRAMSHAXXX(t *testing.T) {
-	t.Parallel()
 	testTable := []struct {
 		name               string
 		mockHandshakeErr   KError
@@ -415,7 +407,6 @@ func TestSASLSCRAMSHAXXX(t *testing.T) {
 	for i, test := range testTable {
 		test := test
 		t.Run(test.name, func(t *testing.T) {
-			t.Parallel()
 			// mockBroker mocks underlying network logic and broker responses
 			mockBroker := NewMockBroker(t, 0)
 			broker := NewBroker(mockBroker.Addr())
@@ -486,7 +477,6 @@ func TestSASLSCRAMSHAXXX(t *testing.T) {
 }
 
 func TestSASLPlainAuth(t *testing.T) {
-	t.Parallel()
 	testTable := []struct {
 		name             string
 		authidentity     string
@@ -520,7 +510,6 @@ func TestSASLPlainAuth(t *testing.T) {
 	for i, test := range testTable {
 		test := test
 		t.Run(test.name, func(t *testing.T) {
-			t.Parallel()
 			// mockBroker mocks underlying network logic and broker responses
 			mockBroker := NewMockBroker(t, 0)
 
@@ -617,7 +606,6 @@ func TestSASLPlainAuth(t *testing.T) {
 // TestSASLReadTimeout ensures that the broker connection won't block forever
 // if the remote end never responds after the handshake
 func TestSASLReadTimeout(t *testing.T) {
-	t.Parallel()
 	mockBroker := NewMockBroker(t, 0)
 	defer mockBroker.Close()
 
@@ -666,7 +654,6 @@ func TestSASLReadTimeout(t *testing.T) {
 }
 
 func TestGSSAPIKerberosAuth_Authorize(t *testing.T) {
-	t.Parallel()
 	testTable := []struct {
 		name               string
 		error              error
@@ -717,7 +704,6 @@ func TestGSSAPIKerberosAuth_Authorize(t *testing.T) {
 	for i, test := range testTable {
 		test := test
 		t.Run(test.name, func(t *testing.T) {
-			t.Parallel()
 			mockBroker := NewMockBroker(t, 0)
 			// broker executes SASL requests against mockBroker
 
@@ -789,7 +775,6 @@ func TestGSSAPIKerberosAuth_Authorize(t *testing.T) {
 }
 
 func TestBuildClientFirstMessage(t *testing.T) {
-	t.Parallel()
 	testTable := []struct {
 		name        string
 		token       *AccessToken
@@ -828,7 +813,6 @@ func TestBuildClientFirstMessage(t *testing.T) {
 	for i, test := range testTable {
 		test := test
 		t.Run(test.name, func(t *testing.T) {
-			t.Parallel()
 			actual, err := buildClientFirstMessage(test.token)
 
 			if !reflect.DeepEqual(test.expected, actual) {
diff --git a/client_test.go b/client_test.go
index f5253a564..412a1429f 100644
--- a/client_test.go
+++ b/client_test.go
@@ -16,7 +16,6 @@ func safeClose(t testing.TB, c io.Closer) {
 }
 
 func TestSimpleClient(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 
 	seedBroker.Returns(new(MetadataResponse))
@@ -31,7 +30,6 @@ func TestSimpleClient(t *testing.T) {
 }
 
 func TestCachedPartitions(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 
 	replicas := []int32{3, 1, 5}
@@ -71,7 +69,6 @@ func TestCachedPartitions(t *testing.T) {
 }
 
 func TestClientDoesntCachePartitionsForTopicsWithErrors(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 
 	replicas := []int32{seedBroker.BrokerID()}
@@ -126,7 +123,6 @@ func TestClientDoesntCachePartitionsForTopicsWithErrors(t *testing.T) {
 }
 
 func TestClientSeedBrokers(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 
 	metadataResponse := new(MetadataResponse)
@@ -143,7 +139,6 @@ func TestClientSeedBrokers(t *testing.T) {
 }
 
 func TestClientMetadata(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 5)
 
@@ -219,7 +214,6 @@ func TestClientMetadata(t *testing.T) {
 }
 
 func TestClientMetadataWithOfflineReplicas(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 5)
 
@@ -308,7 +302,6 @@ func TestClientMetadataWithOfflineReplicas(t *testing.T) {
 }
 
 func TestClientGetOffset(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 	leaderAddr := leader.Addr()
@@ -357,7 +350,6 @@ func TestClientGetOffset(t *testing.T) {
 }
 
 func TestClientReceivingUnknownTopicWithBackoffFunc(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 
 	metadataResponse1 := new(MetadataResponse)
@@ -395,7 +387,6 @@ func TestClientReceivingUnknownTopicWithBackoffFunc(t *testing.T) {
 }
 
 func TestClientReceivingUnknownTopic(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 
 	metadataResponse1 := new(MetadataResponse)
@@ -432,7 +423,6 @@ func TestClientReceivingUnknownTopic(t *testing.T) {
 }
 
 func TestClientReceivingPartialMetadata(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 5)
 
@@ -488,7 +478,6 @@ func TestClientReceivingPartialMetadata(t *testing.T) {
 }
 
 func TestClientRefreshBehaviour(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 5)
 
@@ -526,7 +515,6 @@ func TestClientRefreshBehaviour(t *testing.T) {
 }
 
 func TestClientRefreshBrokers(t *testing.T) {
-	t.Parallel()
 	initialSeed := NewMockBroker(t, 0)
 	leader := NewMockBroker(t, 5)
 
@@ -558,7 +546,6 @@ func TestClientRefreshBrokers(t *testing.T) {
 }
 
 func TestClientRefreshMetadataBrokerOffline(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 5)
 
@@ -589,7 +576,6 @@ func TestClientRefreshMetadataBrokerOffline(t *testing.T) {
 }
 
 func TestClientGetBroker(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 5)
 
@@ -626,7 +612,6 @@ func TestClientGetBroker(t *testing.T) {
 }
 
 func TestClientResurrectDeadSeeds(t *testing.T) {
-	t.Parallel()
 	initialSeed := NewMockBroker(t, 0)
 	emptyMetadata := new(MetadataResponse)
 	initialSeed.Returns(emptyMetadata)
@@ -733,7 +718,6 @@ func TestClientController(t *testing.T) {
 }
 
 func TestClientMetadataTimeout(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		name    string
 		timeout time.Duration
@@ -759,7 +743,6 @@ func TestClientMetadataTimeout(t *testing.T) {
 	for _, tc := range tests {
 		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
-			t.Parallel()
 			// Use a responsive broker to create a working client
 			initialSeed := NewMockBroker(t, 0)
 			emptyMetadata := new(MetadataResponse)
@@ -820,7 +803,6 @@ func TestClientMetadataTimeout(t *testing.T) {
 }
 
 func TestClientCoordinatorWithConsumerOffsetsTopic(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	staleCoordinator := NewMockBroker(t, 2)
 	freshCoordinator := NewMockBroker(t, 3)
@@ -900,7 +882,6 @@ func TestClientCoordinatorWithConsumerOffsetsTopic(t *testing.T) {
 }
 
 func TestClientCoordinatorWithoutConsumerOffsetsTopic(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	coordinator := NewMockBroker(t, 2)
 
@@ -954,7 +935,6 @@ func TestClientCoordinatorWithoutConsumerOffsetsTopic(t *testing.T) {
 }
 
 func TestClientAutorefreshShutdownRace(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 
 	metadataResponse := new(MetadataResponse)
diff --git a/client_tls_test.go b/client_tls_test.go
index d6d8e85be..8d7a51a33 100644
--- a/client_tls_test.go
+++ b/client_tls_test.go
@@ -13,7 +13,6 @@ import (
 )
 
 func TestTLS(t *testing.T) {
-	t.Parallel()
 	cakey, err := rsa.GenerateKey(rand.Reader, 2048)
 	if err != nil {
 		t.Fatal(err)
@@ -176,7 +175,6 @@ func TestTLS(t *testing.T) {
 	} {
 		tc := tc
 		t.Run(tc.name, func(t *testing.T) {
-			t.Parallel()
 			doListenerTLSTest(t, tc.Succeed, tc.Server, tc.Client)
 		})
 	}
@@ -221,7 +219,6 @@ func doListenerTLSTest(t *testing.T, expectSuccess bool, serverConfig, clientCon
 }
 
 func TestSetServerName(t *testing.T) {
-	t.Parallel()
 	if validServerNameTLS("kafka-server.domain.com:9093", nil).ServerName != "kafka-server.domain.com" {
 		t.Fatal("Expected kafka-server.domain.com as tls.ServerName when tls config is nil")
 	}
diff --git a/config_test.go b/config_test.go
index 391b884be..fdde01ff3 100644
--- a/config_test.go
+++ b/config_test.go
@@ -8,7 +8,6 @@ import (
 )
 
 func TestDefaultConfigValidates(t *testing.T) {
-	t.Parallel()
 	config := NewTestConfig()
 	if err := config.Validate(); err != nil {
 		t.Error(err)
@@ -19,7 +18,6 @@ func TestDefaultConfigValidates(t *testing.T) {
 }
 
 func TestInvalidClientIDConfigValidates(t *testing.T) {
-	t.Parallel()
 	config := NewTestConfig()
 	config.ClientID = "foo:bar"
 	if err := config.Validate(); string(err.(ConfigurationError)) != "ClientID is invalid" {
@@ -28,7 +26,6 @@ func TestInvalidClientIDConfigValidates(t *testing.T) {
 }
 
 func TestEmptyClientIDConfigValidates(t *testing.T) {
-	t.Parallel()
 	config := NewTestConfig()
 	config.ClientID = ""
 	if err := config.Validate(); string(err.(ConfigurationError)) != "ClientID is invalid" {
@@ -43,7 +40,6 @@ func (t *DummyTokenProvider) Token() (*AccessToken, error) {
 }
 
 func TestNetConfigValidates(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		name string
 		cfg  func(*Config) // resorting to using a function as a param because of internal composite structs
@@ -239,7 +235,6 @@ func TestNetConfigValidates(t *testing.T) {
 }
 
 func TestMetadataConfigValidates(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		name string
 		cfg  func(*Config) // resorting to using a function as a param because of internal composite structs
@@ -278,7 +273,6 @@ func TestMetadataConfigValidates(t *testing.T) {
 }
 
 func TestAdminConfigValidates(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		name string
 		cfg  func(*Config) // resorting to using a function as a param because of internal composite structs
@@ -303,7 +297,6 @@ func TestAdminConfigValidates(t *testing.T) {
 }
 
 func TestProducerConfigValidates(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		name string
 		cfg  func(*Config) // resorting to using a function as a param because of internal composite structs
@@ -433,7 +426,6 @@ func TestProducerConfigValidates(t *testing.T) {
 }
 
 func TestConsumerConfigValidates(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		name string
 		cfg  func(*Config)
@@ -467,7 +459,6 @@ func TestConsumerConfigValidates(t *testing.T) {
 }
 
 func TestLZ4ConfigValidation(t *testing.T) {
-	t.Parallel()
 	config := NewTestConfig()
 	config.Producer.Compression = CompressionLZ4
 	if err := config.Validate(); string(err.(ConfigurationError)) != "lz4 compression requires Version >= V0_10_0_0" {
@@ -480,7 +471,6 @@ func TestLZ4ConfigValidation(t *testing.T) {
 }
 
 func TestZstdConfigValidation(t *testing.T) {
-	t.Parallel()
 	config := NewTestConfig()
 	config.Producer.Compression = CompressionZSTD
 	if err := config.Validate(); string(err.(ConfigurationError)) != "zstd compression requires Version >= V2_1_0_0" {
diff --git a/consumer_group_members_test.go b/consumer_group_members_test.go
index a7ce8c350..a99de61c6 100644
--- a/consumer_group_members_test.go
+++ b/consumer_group_members_test.go
@@ -45,7 +45,6 @@ var (
 )
 
 func TestConsumerGroupMemberMetadata(t *testing.T) {
-	t.Parallel()
 	meta := &ConsumerGroupMemberMetadata{
 		Version:  0,
 		Topics:   []string{"one", "two"},
@@ -69,7 +68,6 @@ func TestConsumerGroupMemberMetadata(t *testing.T) {
 }
 
 func TestConsumerGroupMemberMetadataV1Decode(t *testing.T) {
-	t.Parallel()
 	meta := new(ConsumerGroupMemberMetadata)
 	if err := decode(groupMemberMetadataV1, meta); err != nil {
 		t.Error("Failed to decode V1 data", err)
@@ -80,7 +78,6 @@ func TestConsumerGroupMemberMetadataV1Decode(t *testing.T) {
 }
 
 func TestConsumerGroupMemberAssignment(t *testing.T) {
-	t.Parallel()
 	amt := &ConsumerGroupMemberAssignment{
 		Version: 0,
 		Topics: map[string][]int32{
diff --git a/consumer_metadata_request_test.go b/consumer_metadata_request_test.go
index 100c9354a..3f6bcdb57 100644
--- a/consumer_metadata_request_test.go
+++ b/consumer_metadata_request_test.go
@@ -15,7 +15,6 @@ var (
 )
 
 func TestConsumerMetadataRequest(t *testing.T) {
-	t.Parallel()
 	request := new(ConsumerMetadataRequest)
 	testEncodable(t, "empty string", request, consumerMetadataRequestEmpty)
 	testVersionDecodable(t, "empty string", request, consumerMetadataRequestEmpty, 0)
diff --git a/consumer_metadata_response_test.go b/consumer_metadata_response_test.go
index 6b0f782d2..a7d74b55b 100644
--- a/consumer_metadata_response_test.go
+++ b/consumer_metadata_response_test.go
@@ -19,7 +19,6 @@ var (
 )
 
 func TestConsumerMetadataResponseError(t *testing.T) {
-	t.Parallel()
 	response := &ConsumerMetadataResponse{Err: ErrOffsetsLoadInProgress}
 	testEncodable(t, "", response, consumerMetadataResponseError)
 
@@ -34,7 +33,6 @@ func TestConsumerMetadataResponseError(t *testing.T) {
 }
 
 func TestConsumerMetadataResponseSuccess(t *testing.T) {
-	t.Parallel()
 	broker := NewBroker("foo:52445")
 	broker.id = 0xAB
 	response := ConsumerMetadataResponse{
diff --git a/consumer_test.go b/consumer_test.go
index 038bbd542..48c8090e9 100644
--- a/consumer_test.go
+++ b/consumer_test.go
@@ -16,7 +16,6 @@ var testMsg = StringEncoder("Foo")
 // If a particular offset is provided then messages are consumed starting from
 // that offset.
 func TestConsumerOffsetManual(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 0)
 
@@ -79,7 +78,6 @@ func TestConsumerOffsetManual(t *testing.T) {
 }
 
 func TestPauseResumeConsumption(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 0)
 
@@ -164,7 +162,6 @@ func TestPauseResumeConsumption(t *testing.T) {
 // message indeed corresponds to the offset that broker claims to be the
 // newest in its metadata response.
 func TestConsumerOffsetNewest(t *testing.T) {
-	t.Parallel()
 	// Given
 	offsetNewest := int64(10)
 	offsetNewestAfterFetchRequest := int64(50)
@@ -211,7 +208,6 @@ func TestConsumerOffsetNewest(t *testing.T) {
 // If `OffsetOldest` is passed as the initial offset then the first consumed
 // message is indeed the first available in the partition.
 func TestConsumerOffsetOldest(t *testing.T) {
-	t.Parallel()
 	// Given
 	offsetNewest := int64(10)
 	broker0 := NewMockBroker(t, 0)
@@ -259,7 +255,6 @@ func TestConsumerOffsetOldest(t *testing.T) {
 
 // It is possible to close a partition consumer and create the same anew.
 func TestConsumerRecreate(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 0)
 	broker0.SetHandlerByMap(map[string]MockResponse{
@@ -301,7 +296,6 @@ func TestConsumerRecreate(t *testing.T) {
 
 // An attempt to consume the same partition twice should fail.
 func TestConsumerDuplicate(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 0)
 	broker0.SetHandlerByMap(map[string]MockResponse{
@@ -413,7 +407,6 @@ func runConsumerLeaderRefreshErrorTestWithConfig(t *testing.T, config *Config) {
 // If consumer fails to refresh metadata it keeps retrying with frequency
 // specified by `Config.Consumer.Retry.Backoff`.
 func TestConsumerLeaderRefreshError(t *testing.T) {
-	t.Parallel()
 	config := NewTestConfig()
 	config.Net.ReadTimeout = 100 * time.Millisecond
 	config.Consumer.Retry.Backoff = 200 * time.Millisecond
@@ -424,7 +417,6 @@ func TestConsumerLeaderRefreshError(t *testing.T) {
 }
 
 func TestConsumerLeaderRefreshErrorWithBackoffFunc(t *testing.T) {
-	t.Parallel()
 	var calls int32 = 0
 
 	config := NewTestConfig()
@@ -445,7 +437,6 @@ func TestConsumerLeaderRefreshErrorWithBackoffFunc(t *testing.T) {
 }
 
 func TestConsumerInvalidTopic(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 100)
 	broker0.SetHandlerByMap(map[string]MockResponse{
@@ -473,7 +464,6 @@ func TestConsumerInvalidTopic(t *testing.T) {
 // Nothing bad happens if a partition consumer that has no leader assigned at
 // the moment is closed.
 func TestConsumerClosePartitionWithoutLeader(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 100)
 	broker0.SetHandlerByMap(map[string]MockResponse{
@@ -528,7 +518,6 @@ func TestConsumerClosePartitionWithoutLeader(t *testing.T) {
 // actual offset range for the partition, then the partition consumer stops
 // immediately closing its output channels.
 func TestConsumerShutsDownOutOfRange(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 0)
 	fetchResponse := new(FetchResponse)
@@ -567,7 +556,6 @@ func TestConsumerShutsDownOutOfRange(t *testing.T) {
 // If a fetch response contains messages with offsets that are smaller then
 // requested, then such messages are ignored.
 func TestConsumerExtraOffsets(t *testing.T) {
-	t.Parallel()
 	// Given
 	legacyFetchResponse := &FetchResponse{}
 	legacyFetchResponse.AddMessage("my_topic", 0, nil, testMsg, 1)
@@ -642,7 +630,6 @@ func TestConsumerExtraOffsets(t *testing.T) {
 // messages older then requested, even though there would be
 // more messages if higher offset was requested.
 func TestConsumerReceivingFetchResponseWithTooOldRecords(t *testing.T) {
-	t.Parallel()
 	// Given
 	fetchResponse1 := &FetchResponse{Version: 4}
 	fetchResponse1.AddRecord("my_topic", 0, nil, testMsg, 1)
@@ -691,7 +678,6 @@ func TestConsumerReceivingFetchResponseWithTooOldRecords(t *testing.T) {
 }
 
 func TestConsumeMessageWithNewerFetchAPIVersion(t *testing.T) {
-	t.Parallel()
 	// Given
 	fetchResponse1 := &FetchResponse{Version: 4}
 	fetchResponse1.AddMessage("my_topic", 0, nil, testMsg, 1)
@@ -735,7 +721,6 @@ func TestConsumeMessageWithNewerFetchAPIVersion(t *testing.T) {
 }
 
 func TestConsumeMessageWithSessionIDs(t *testing.T) {
-	t.Parallel()
 	// Given
 	fetchResponse1 := &FetchResponse{Version: 7}
 	fetchResponse1.AddMessage("my_topic", 0, nil, testMsg, 1)
@@ -785,7 +770,6 @@ func TestConsumeMessageWithSessionIDs(t *testing.T) {
 }
 
 func TestConsumeMessagesFromReadReplica(t *testing.T) {
-	t.Parallel()
 	// Given
 	fetchResponse1 := &FetchResponse{Version: 11}
 	fetchResponse1.AddMessage("my_topic", 0, nil, testMsg, 1)
@@ -864,7 +848,6 @@ func TestConsumeMessagesFromReadReplica(t *testing.T) {
 }
 
 func TestConsumeMessagesFromReadReplicaLeaderFallback(t *testing.T) {
-	t.Parallel()
 	// Given
 	fetchResponse1 := &FetchResponse{Version: 11}
 	fetchResponse1.AddMessage("my_topic", 0, nil, testMsg, 1)
@@ -917,7 +900,6 @@ func TestConsumeMessagesFromReadReplicaLeaderFallback(t *testing.T) {
 }
 
 func TestConsumeMessagesFromReadReplicaErrorReplicaNotAvailable(t *testing.T) {
-	t.Parallel()
 	// Given
 	fetchResponse1 := &FetchResponse{Version: 11}
 	block1 := fetchResponse1.getOrCreateBlock("my_topic", 0)
@@ -990,7 +972,6 @@ func TestConsumeMessagesFromReadReplicaErrorReplicaNotAvailable(t *testing.T) {
 }
 
 func TestConsumeMessagesFromReadReplicaErrorUnknown(t *testing.T) {
-	t.Parallel()
 	// Given
 	fetchResponse1 := &FetchResponse{Version: 11}
 	block1 := fetchResponse1.getOrCreateBlock("my_topic", 0)
@@ -1069,7 +1050,6 @@ func TestConsumeMessagesFromReadReplicaErrorUnknown(t *testing.T) {
 //
 // See https://github.com/Shopify/sarama/issues/1927
 func TestConsumeMessagesTrackLeader(t *testing.T) {
-	t.Parallel()
 	cfg := NewConfig()
 	cfg.ClientID = t.Name()
 	cfg.Metadata.RefreshFrequency = time.Millisecond * 50
@@ -1181,7 +1161,6 @@ func TestConsumeMessagesTrackLeader(t *testing.T) {
 // It is fine if offsets of fetched messages are not sequential (although
 // strictly increasing!).
 func TestConsumerNonSequentialOffsets(t *testing.T) {
-	t.Parallel()
 	// Given
 	legacyFetchResponse := &FetchResponse{}
 	legacyFetchResponse.AddMessage("my_topic", 0, nil, testMsg, 5)
@@ -1241,7 +1220,6 @@ func TestConsumerNonSequentialOffsets(t *testing.T) {
 // If leadership for a partition is changing then consumer resolves the new
 // leader and switches to it.
 func TestConsumerRebalancingMultiplePartitions(t *testing.T) {
-	t.Parallel()
 	// initial setup
 	seedBroker := NewMockBroker(t, 10)
 	leader0 := NewMockBroker(t, 0)
@@ -1440,7 +1418,6 @@ func TestConsumerRebalancingMultiplePartitions(t *testing.T) {
 // consumer channel buffer is full then that does not affect the ability to
 // read messages by the other consumer.
 func TestConsumerInterleavedClose(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 0)
 	broker0.SetHandlerByMap(map[string]MockResponse{
@@ -1489,7 +1466,6 @@ func TestConsumerInterleavedClose(t *testing.T) {
 }
 
 func TestConsumerBounceWithReferenceOpen(t *testing.T) {
-	t.Parallel()
 	broker0 := NewMockBroker(t, 0)
 	broker0Addr := broker0.Addr()
 	broker1 := NewMockBroker(t, 1)
@@ -1588,7 +1564,6 @@ func TestConsumerBounceWithReferenceOpen(t *testing.T) {
 }
 
 func TestConsumerOffsetOutOfRange(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 2)
 	broker0.SetHandlerByMap(map[string]MockResponse{
@@ -1621,7 +1596,6 @@ func TestConsumerOffsetOutOfRange(t *testing.T) {
 }
 
 func TestConsumerExpiryTicker(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 0)
 	fetchResponse1 := &FetchResponse{}
@@ -1664,7 +1638,6 @@ func TestConsumerExpiryTicker(t *testing.T) {
 }
 
 func TestConsumerTimestamps(t *testing.T) {
-	t.Parallel()
 	now := time.Now().Truncate(time.Millisecond)
 	type testMessage struct {
 		key       Encoder
@@ -1782,7 +1755,6 @@ func TestConsumerTimestamps(t *testing.T) {
 
 // When set to ReadCommitted, no uncommitted message should be available in messages channel
 func TestExcludeUncommitted(t *testing.T) {
-	t.Parallel()
 	// Given
 	broker0 := NewMockBroker(t, 0)
 
@@ -1896,7 +1868,6 @@ ConsumerLoop:
 }
 
 func Test_partitionConsumer_parseResponse(t *testing.T) {
-	t.Parallel()
 	type args struct {
 		response *FetchResponse
 	}
@@ -1925,7 +1896,6 @@ func Test_partitionConsumer_parseResponse(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			child := &partitionConsumer{
 				broker: &brokerConsumer{
 					broker: &Broker{},
@@ -1945,7 +1915,6 @@ func Test_partitionConsumer_parseResponse(t *testing.T) {
 }
 
 func Test_partitionConsumer_parseResponseEmptyBatch(t *testing.T) {
-	t.Parallel()
 	lrbOffset := int64(5)
 	block := &FetchResponseBlock{
 		HighWaterMarkOffset:    10,
@@ -2028,7 +1997,6 @@ func testConsumerInterceptor(
 }
 
 func TestConsumerInterceptors(t *testing.T) {
-	t.Parallel()
 	tests := []struct {
 		name          string
 		interceptors  []ConsumerInterceptor
@@ -2086,7 +2054,6 @@ func TestConsumerInterceptors(t *testing.T) {
 	for _, tt := range tests {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			testConsumerInterceptor(t, tt.interceptors, tt.expectationFn)
 		})
 	}
diff --git a/control_record_test.go b/control_record_test.go
index 871edbab6..8a1d74863 100644
--- a/control_record_test.go
+++ b/control_record_test.go
@@ -46,7 +46,6 @@ func assertRecordType(t *testing.T, r *ControlRecord, expected ControlRecordType
 }
 
 func TestDecodingControlRecords(t *testing.T) {
-	t.Parallel()
 	abortTx := testDecode(t, "abort transaction", abortTxCtrlRecKey, abortTxCtrlRecValue)
 
 	assertRecordType(t, &abortTx, ControlRecordAbort)
diff --git a/create_partitions_request_test.go b/create_partitions_request_test.go
index 0c5923cda..8230b3866 100644
--- a/create_partitions_request_test.go
+++ b/create_partitions_request_test.go
@@ -30,7 +30,6 @@ var (
 )
 
 func TestCreatePartitionsRequest(t *testing.T) {
-	t.Parallel()
 	req := &CreatePartitionsRequest{
 		TopicPartitions: map[string]*TopicPartition{
 			"topic": {
diff --git a/create_partitions_response_test.go b/create_partitions_response_test.go
index 9f9ee64ee..2f5967494 100644
--- a/create_partitions_response_test.go
+++ b/create_partitions_response_test.go
@@ -25,7 +25,6 @@ var (
 )
 
 func TestCreatePartitionsResponse(t *testing.T) {
-	t.Parallel()
 	resp := &CreatePartitionsResponse{
 		ThrottleTime: 100 * time.Millisecond,
 		TopicPartitionErrors: map[string]*TopicPartitionError{
@@ -53,7 +52,6 @@ func TestCreatePartitionsResponse(t *testing.T) {
 }
 
 func TestTopicPartitionError(t *testing.T) {
-	t.Parallel()
 	// Assert that TopicPartitionError satisfies error interface
 	var err error = &TopicPartitionError{
 		Err: ErrTopicAuthorizationFailed,
diff --git a/create_topics_request_test.go b/create_topics_request_test.go
index 3298e06a2..daf223c53 100644
--- a/create_topics_request_test.go
+++ b/create_topics_request_test.go
@@ -23,7 +23,6 @@ var (
 )
 
 func TestCreateTopicsRequest(t *testing.T) {
-	t.Parallel()
 	retention := "-1"
 
 	req := &CreateTopicsRequest{
diff --git a/create_topics_response_test.go b/create_topics_response_test.go
index 73d803784..2dfb8d159 100644
--- a/create_topics_response_test.go
+++ b/create_topics_response_test.go
@@ -29,7 +29,6 @@ var (
 )
 
 func TestCreateTopicsResponse(t *testing.T) {
-	t.Parallel()
 	resp := &CreateTopicsResponse{
 		TopicErrors: map[string]*TopicError{
 			"topic": {
@@ -53,7 +52,6 @@ func TestCreateTopicsResponse(t *testing.T) {
 }
 
 func TestTopicError(t *testing.T) {
-	t.Parallel()
 	// Assert that TopicError satisfies error interface
 	var err error = &TopicError{
 		Err: ErrTopicAuthorizationFailed,
diff --git a/delete_groups_request_test.go b/delete_groups_request_test.go
index cf1144493..908172498 100644
--- a/delete_groups_request_test.go
+++ b/delete_groups_request_test.go
@@ -18,7 +18,6 @@ var (
 )
 
 func TestDeleteGroupsRequest(t *testing.T) {
-	t.Parallel()
 	var request *DeleteGroupsRequest
 
 	request = new(DeleteGroupsRequest)
diff --git a/delete_groups_response_test.go b/delete_groups_response_test.go
index e524d288f..6f622b5f0 100644
--- a/delete_groups_response_test.go
+++ b/delete_groups_response_test.go
@@ -26,7 +26,6 @@ var (
 )
 
 func TestDeleteGroupsResponse(t *testing.T) {
-	t.Parallel()
 	var response *DeleteGroupsResponse
 
 	response = new(DeleteGroupsResponse)
diff --git a/delete_offsets_request_test.go b/delete_offsets_request_test.go
index 3e9769c8f..0eea3fc9f 100644
--- a/delete_offsets_request_test.go
+++ b/delete_offsets_request_test.go
@@ -10,7 +10,6 @@ var (
 )
 
 func TestDeleteOffsetsRequest(t *testing.T) {
-	t.Parallel()
 	var request *DeleteOffsetsRequest
 
 	request = new(DeleteOffsetsRequest)
diff --git a/delete_offsets_response_test.go b/delete_offsets_response_test.go
index aec939bbb..8d069dbcb 100644
--- a/delete_offsets_response_test.go
+++ b/delete_offsets_response_test.go
@@ -33,7 +33,6 @@ var (
 )
 
 func TestDeleteOffsetsResponse(t *testing.T) {
-	t.Parallel()
 	var response *DeleteOffsetsResponse
 
 	response = &DeleteOffsetsResponse{
diff --git a/delete_records_request_test.go b/delete_records_request_test.go
index f42d2ffe7..c72960cfb 100644
--- a/delete_records_request_test.go
+++ b/delete_records_request_test.go
@@ -19,7 +19,6 @@ var deleteRecordsRequest = []byte{
 }
 
 func TestDeleteRecordsRequest(t *testing.T) {
-	t.Parallel()
 	req := &DeleteRecordsRequest{
 		Topics: map[string]*DeleteRecordsRequestTopic{
 			"topic": {
diff --git a/delete_records_response_test.go b/delete_records_response_test.go
index 32e535b20..3653cdc41 100644
--- a/delete_records_response_test.go
+++ b/delete_records_response_test.go
@@ -21,7 +21,6 @@ var deleteRecordsResponse = []byte{
 }
 
 func TestDeleteRecordsResponse(t *testing.T) {
-	t.Parallel()
 	resp := &DeleteRecordsResponse{
 		Version:      0,
 		ThrottleTime: 100 * time.Millisecond,
diff --git a/delete_topics_request_test.go b/delete_topics_request_test.go
index 6f4ea1ba3..c313a2f3b 100644
--- a/delete_topics_request_test.go
+++ b/delete_topics_request_test.go
@@ -13,7 +13,6 @@ var deleteTopicsRequest = []byte{
 }
 
 func TestDeleteTopicsRequestV0(t *testing.T) {
-	t.Parallel()
 	req := &DeleteTopicsRequest{
 		Version: 0,
 		Topics:  []string{"topic", "other"},
@@ -24,7 +23,6 @@ func TestDeleteTopicsRequestV0(t *testing.T) {
 }
 
 func TestDeleteTopicsRequestV1(t *testing.T) {
-	t.Parallel()
 	req := &DeleteTopicsRequest{
 		Version: 1,
 		Topics:  []string{"topic", "other"},
diff --git a/delete_topics_response_test.go b/delete_topics_response_test.go
index 534acd4b8..516f1a3bd 100644
--- a/delete_topics_response_test.go
+++ b/delete_topics_response_test.go
@@ -21,7 +21,6 @@ var (
 )
 
 func TestDeleteTopicsResponse(t *testing.T) {
-	t.Parallel()
 	resp := &DeleteTopicsResponse{
 		TopicErrorCodes: map[string]KError{
 			"topic": ErrNoError,
diff --git a/describe_client_quotas_request_test.go b/describe_client_quotas_request_test.go
index 790443e4a..6b8c0c9c5 100644
--- a/describe_client_quotas_request_test.go
+++ b/describe_client_quotas_request_test.go
@@ -37,7 +37,6 @@ var (
 )
 
 func TestDescribeClientQuotasRequest(t *testing.T) {
-	t.Parallel()
 	// Match All
 	req := &DescribeClientQuotasRequest{
 		Components: []QuotaFilterComponent{},
diff --git a/describe_client_quotas_response_test.go b/describe_client_quotas_response_test.go
index 1248838ec..6c681d11c 100644
--- a/describe_client_quotas_response_test.go
+++ b/describe_client_quotas_response_test.go
@@ -44,7 +44,6 @@ var (
 )
 
 func TestDescribeClientQuotasResponse(t *testing.T) {
-	t.Parallel()
 	// Response With Error
 	errMsg := "Custom entity type 'faulty' not supported"
 	res := &DescribeClientQuotasResponse{
diff --git a/describe_configs_request_test.go b/describe_configs_request_test.go
index 79160ad2f..a1148f401 100644
--- a/describe_configs_request_test.go
+++ b/describe_configs_request_test.go
@@ -49,7 +49,6 @@ var (
 )
 
 func TestDescribeConfigsRequestv0(t *testing.T) {
-	t.Parallel()
 	var request *DescribeConfigsRequest
 
 	request = &DescribeConfigsRequest{
@@ -103,7 +102,6 @@ func TestDescribeConfigsRequestv0(t *testing.T) {
 }
 
 func TestDescribeConfigsRequestv1(t *testing.T) {
-	t.Parallel()
 	request := &DescribeConfigsRequest{
 		Version: 1,
 		Resources: []*ConfigResource{
diff --git a/describe_configs_response_test.go b/describe_configs_response_test.go
index 0aa602d6a..ea8f28e57 100644
--- a/describe_configs_response_test.go
+++ b/describe_configs_response_test.go
@@ -93,7 +93,6 @@ var (
 )
 
 func TestDescribeConfigsResponsev0(t *testing.T) {
-	t.Parallel()
 	var response *DescribeConfigsResponse
 
 	response = &DescribeConfigsResponse{
@@ -128,7 +127,6 @@ func TestDescribeConfigsResponsev0(t *testing.T) {
 }
 
 func TestDescribeConfigsResponseWithDefaultv0(t *testing.T) {
-	t.Parallel()
 	var response *DescribeConfigsResponse
 
 	response = &DescribeConfigsResponse{
@@ -163,7 +161,6 @@ func TestDescribeConfigsResponseWithDefaultv0(t *testing.T) {
 }
 
 func TestDescribeConfigsResponsev1(t *testing.T) {
-	t.Parallel()
 	var response *DescribeConfigsResponse
 
 	response = &DescribeConfigsResponse{
@@ -200,7 +197,6 @@ func TestDescribeConfigsResponsev1(t *testing.T) {
 }
 
 func TestDescribeConfigsResponseWithSynonym(t *testing.T) {
-	t.Parallel()
 	var response *DescribeConfigsResponse
 
 	response = &DescribeConfigsResponse{
@@ -243,7 +239,6 @@ func TestDescribeConfigsResponseWithSynonym(t *testing.T) {
 }
 
 func TestDescribeConfigsResponseWithDefaultv1(t *testing.T) {
-	t.Parallel()
 	var response *DescribeConfigsResponse
 
 	response = &DescribeConfigsResponse{
diff --git a/describe_groups_request_test.go b/describe_groups_request_test.go
index 3a538263d..7d45f3fee 100644
--- a/describe_groups_request_test.go
+++ b/describe_groups_request_test.go
@@ -18,7 +18,6 @@ var (
 )
 
 func TestDescribeGroupsRequest(t *testing.T) {
-	t.Parallel()
 	var request *DescribeGroupsRequest
 
 	request = new(DescribeGroupsRequest)
diff --git a/describe_groups_response_test.go b/describe_groups_response_test.go
index b63b25ec3..dd3973191 100644
--- a/describe_groups_response_test.go
+++ b/describe_groups_response_test.go
@@ -35,7 +35,6 @@ var (
 )
 
 func TestDescribeGroupsResponse(t *testing.T) {
-	t.Parallel()
 	var response *DescribeGroupsResponse
 
 	response = new(DescribeGroupsResponse)
diff --git a/describe_log_dirs_request_test.go b/describe_log_dirs_request_test.go
index f2b140ad1..65b88c685 100644
--- a/describe_log_dirs_request_test.go
+++ b/describe_log_dirs_request_test.go
@@ -15,7 +15,6 @@ var (
 )
 
 func TestDescribeLogDirsRequest(t *testing.T) {
-	t.Parallel()
 	request := &DescribeLogDirsRequest{
 		Version:        0,
 		DescribeTopics: []DescribeLogDirsRequestTopic{},
diff --git a/describe_log_dirs_response_test.go b/describe_log_dirs_response_test.go
index f533e8e0c..5a1eb5b5e 100644
--- a/describe_log_dirs_response_test.go
+++ b/describe_log_dirs_response_test.go
@@ -32,7 +32,6 @@ var (
 )
 
 func TestDescribeLogDirsResponse(t *testing.T) {
-	t.Parallel()
 	// Test empty response
 	response := &DescribeLogDirsResponse{
 		LogDirs: []DescribeLogDirsResponseDirMetadata{},
diff --git a/describe_user_scram_credentials_request_test.go b/describe_user_scram_credentials_request_test.go
index a522a075b..87e52bab6 100644
--- a/describe_user_scram_credentials_request_test.go
+++ b/describe_user_scram_credentials_request_test.go
@@ -15,7 +15,6 @@ var (
 )
 
 func TestDescribeUserScramCredentialsRequest(t *testing.T) {
-	t.Parallel()
 	request := &DescribeUserScramCredentialsRequest{
 		Version:       0,
 		DescribeUsers: []DescribeUserScramCredentialsRequestUser{},
diff --git a/describe_user_scram_credentials_response_test.go b/describe_user_scram_credentials_response_test.go
index 66b7a2884..a251eaf7a 100644
--- a/describe_user_scram_credentials_response_test.go
+++ b/describe_user_scram_credentials_response_test.go
@@ -30,7 +30,6 @@ var (
 )
 
 func TestDescribeUserScramCredentialsResponse(t *testing.T) {
-	t.Parallel()
 	response := &DescribeUserScramCredentialsResponse{
 		Version:      0,
 		ThrottleTime: time.Second * 3,
diff --git a/end_txn_request_test.go b/end_txn_request_test.go
index cc8fc7ee2..6f5d4480e 100644
--- a/end_txn_request_test.go
+++ b/end_txn_request_test.go
@@ -10,7 +10,6 @@ var endTxnRequest = []byte{
 }
 
 func TestEndTxnRequest(t *testing.T) {
-	t.Parallel()
 	req := &EndTxnRequest{
 		TransactionalID:   "txn",
 		ProducerID:        8000,
diff --git a/end_txn_response_test.go b/end_txn_response_test.go
index 291cfb653..d7ae1c988 100644
--- a/end_txn_response_test.go
+++ b/end_txn_response_test.go
@@ -11,7 +11,6 @@ var endTxnResponse = []byte{
 }
 
 func TestEndTxnResponse(t *testing.T) {
-	t.Parallel()
 	resp := &EndTxnResponse{
 		ThrottleTime: 100 * time.Millisecond,
 		Err:          ErrInvalidProducerIDMapping,
diff --git a/examples/http_server/http_server_test.go b/examples/http_server/http_server_test.go
index f171c85b2..ac3ba4d07 100644
--- a/examples/http_server/http_server_test.go
+++ b/examples/http_server/http_server_test.go
@@ -14,7 +14,6 @@ import (
 // and one data collector entry. Let's assume both will succeed.
 // We should return a HTTP 200 status.
 func TestCollectSuccessfully(t *testing.T) {
-	t.Parallel()
 	dataCollectorMock := mocks.NewSyncProducer(t, nil)
 	dataCollectorMock.ExpectSendMessageAndSucceed()
 
@@ -51,7 +50,6 @@ func TestCollectSuccessfully(t *testing.T) {
 // Now, let's see if we handle the case of not being able to produce
 // to the data collector properly. In this case we should return a 500 status.
 func TestCollectionFailure(t *testing.T) {
-	t.Parallel()
 	dataCollectorMock := mocks.NewSyncProducer(t, nil)
 	dataCollectorMock.ExpectSendMessageAndFail(sarama.ErrRequestTimedOut)
 
@@ -80,7 +78,6 @@ func TestCollectionFailure(t *testing.T) {
 // so we are not setting any expectations on the dataCollectorMock. It
 // will still generate an access log entry though.
 func TestWrongPath(t *testing.T) {
-	t.Parallel()
 	dataCollectorMock := mocks.NewSyncProducer(t, nil)
 
 	accessLogProducerMock := mocks.NewAsyncProducer(t, nil)
diff --git a/fetch_request_test.go b/fetch_request_test.go
index 9fd59b40c..0b807b9f8 100644
--- a/fetch_request_test.go
+++ b/fetch_request_test.go
@@ -51,15 +51,12 @@ var (
 )
 
 func TestFetchRequest(t *testing.T) {
-	t.Parallel()
 	t.Run("no blocks", func(t *testing.T) {
-		t.Parallel()
 		request := new(FetchRequest)
 		testRequest(t, "no blocks", request, fetchRequestNoBlocks)
 	})
 
 	t.Run("with properties", func(t *testing.T) {
-		t.Parallel()
 		request := new(FetchRequest)
 		request.MaxWaitTime = 0x20
 		request.MinBytes = 0xEF
@@ -67,7 +64,6 @@ func TestFetchRequest(t *testing.T) {
 	})
 
 	t.Run("one block", func(t *testing.T) {
-		t.Parallel()
 		request := new(FetchRequest)
 		request.MaxWaitTime = 0
 		request.MinBytes = 0
@@ -76,7 +72,6 @@ func TestFetchRequest(t *testing.T) {
 	})
 
 	t.Run("one block v4", func(t *testing.T) {
-		t.Parallel()
 		request := new(FetchRequest)
 		request.Version = 4
 		request.MaxBytes = 0xFF
@@ -86,7 +81,6 @@ func TestFetchRequest(t *testing.T) {
 	})
 
 	t.Run("one block v11 rackid", func(t *testing.T) {
-		t.Parallel()
 		request := new(FetchRequest)
 		request.Version = 11
 		request.MaxBytes = 0xFF
diff --git a/fetch_response_test.go b/fetch_response_test.go
index badbac821..3ba3eb5d1 100644
--- a/fetch_response_test.go
+++ b/fetch_response_test.go
@@ -202,7 +202,6 @@ var (
 )
 
 func TestEmptyFetchResponse(t *testing.T) {
-	t.Parallel()
 	response := FetchResponse{}
 	testVersionDecodable(t, "empty", &response, emptyFetchResponse, 0)
 
@@ -212,7 +211,6 @@ func TestEmptyFetchResponse(t *testing.T) {
 }
 
 func TestOneMessageFetchResponse(t *testing.T) {
-	t.Parallel()
 	response := FetchResponse{}
 	testVersionDecodable(t, "one message", &response, oneMessageFetchResponse, 0)
 
@@ -269,7 +267,6 @@ func TestOneMessageFetchResponse(t *testing.T) {
 }
 
 func TestOverflowMessageFetchResponse(t *testing.T) {
-	t.Parallel()
 	response := FetchResponse{}
 	testVersionDecodable(t, "overflow message", &response, overflowMessageFetchResponse, 0)
 
@@ -330,7 +327,6 @@ func TestOverflowMessageFetchResponse(t *testing.T) {
 }
 
 func TestOneRecordFetchResponse(t *testing.T) {
-	t.Parallel()
 	response := FetchResponse{}
 	testVersionDecodable(t, "one record", &response, oneRecordFetchResponse, 4)
 
@@ -380,7 +376,6 @@ func TestOneRecordFetchResponse(t *testing.T) {
 }
 
 func TestPartailFetchResponse(t *testing.T) {
-	t.Parallel()
 	response := FetchResponse{}
 	testVersionDecodable(t, "partial record", &response, partialFetchResponse, 4)
 
@@ -423,7 +418,6 @@ func TestPartailFetchResponse(t *testing.T) {
 }
 
 func TestEmptyRecordsFetchResponse(t *testing.T) {
-	t.Parallel()
 	response := FetchResponse{}
 	testVersionDecodable(t, "empty record", &response, emptyRecordsFetchResponsev11, 11)
 
@@ -469,7 +463,6 @@ func TestEmptyRecordsFetchResponse(t *testing.T) {
 }
 
 func TestOneMessageFetchResponseV4(t *testing.T) {
-	t.Parallel()
 	response := FetchResponse{}
 	testVersionDecodable(t, "one message v4", &response, oneMessageFetchResponseV4, 4)
 
@@ -526,7 +519,6 @@ func TestOneMessageFetchResponseV4(t *testing.T) {
 }
 
 func TestPreferredReplicaFetchResponseV11(t *testing.T) {
-	t.Parallel()
 	response := FetchResponse{}
 	testVersionDecodable(
 		t, "preferred replica fetch response v11", &response,
diff --git a/find_coordinator_request_test.go b/find_coordinator_request_test.go
index c5c56ceb5..7e889b074 100644
--- a/find_coordinator_request_test.go
+++ b/find_coordinator_request_test.go
@@ -15,7 +15,6 @@ var (
 )
 
 func TestFindCoordinatorRequest(t *testing.T) {
-	t.Parallel()
 	req := &FindCoordinatorRequest{
 		Version:         1,
 		CoordinatorKey:  "group",
diff --git a/find_coordinator_response_test.go b/find_coordinator_response_test.go
index f790e01d0..417a76c6e 100644
--- a/find_coordinator_response_test.go
+++ b/find_coordinator_response_test.go
@@ -6,7 +6,6 @@ import (
 )
 
 func TestFindCoordinatorResponse(t *testing.T) {
-	t.Parallel()
 	errMsg := "kaboom"
 
 	for _, tc := range []struct {
diff --git a/heartbeat_request_test.go b/heartbeat_request_test.go
index c2588386c..2653f82c7 100644
--- a/heartbeat_request_test.go
+++ b/heartbeat_request_test.go
@@ -9,7 +9,6 @@ var basicHeartbeatRequest = []byte{
 }
 
 func TestHeartbeatRequest(t *testing.T) {
-	t.Parallel()
 	request := new(HeartbeatRequest)
 	request.GroupId = "foo"
 	request.GenerationId = 66051
diff --git a/heartbeat_response_test.go b/heartbeat_response_test.go
index 6ca6eab61..e60146bdc 100644
--- a/heartbeat_response_test.go
+++ b/heartbeat_response_test.go
@@ -7,7 +7,6 @@ var heartbeatResponseNoError = []byte{
 }
 
 func TestHeartbeatResponse(t *testing.T) {
-	t.Parallel()
 	response := new(HeartbeatResponse)
 	testVersionDecodable(t, "no error", response, heartbeatResponseNoError, 0)
 	if response.Err != ErrNoError {
diff --git a/incremental_alter_configs_request_test.go b/incremental_alter_configs_request_test.go
index 977869011..d239bf5f5 100644
--- a/incremental_alter_configs_request_test.go
+++ b/incremental_alter_configs_request_test.go
@@ -44,7 +44,6 @@ var (
 )
 
 func TestIncrementalAlterConfigsRequest(t *testing.T) {
-	t.Parallel()
 	var request *IncrementalAlterConfigsRequest
 
 	request = &IncrementalAlterConfigsRequest{
diff --git a/incremental_alter_configs_response_test.go b/incremental_alter_configs_response_test.go
index 0e9f92adc..697156709 100644
--- a/incremental_alter_configs_response_test.go
+++ b/incremental_alter_configs_response_test.go
@@ -21,7 +21,6 @@ var (
 )
 
 func TestIncrementalAlterConfigsResponse(t *testing.T) {
-	t.Parallel()
 	var response *IncrementalAlterConfigsResponse
 
 	response = &IncrementalAlterConfigsResponse{
diff --git a/init_producer_id_request_test.go b/init_producer_id_request_test.go
index 78261884c..5c83d8514 100644
--- a/init_producer_id_request_test.go
+++ b/init_producer_id_request_test.go
@@ -18,7 +18,6 @@ var (
 )
 
 func TestInitProducerIDRequest(t *testing.T) {
-	t.Parallel()
 	req := &InitProducerIDRequest{
 		TransactionTimeout: 100 * time.Millisecond,
 	}
diff --git a/init_producer_id_response_test.go b/init_producer_id_response_test.go
index 15f07f330..b0649386a 100644
--- a/init_producer_id_response_test.go
+++ b/init_producer_id_response_test.go
@@ -22,7 +22,6 @@ var (
 )
 
 func TestInitProducerIDResponse(t *testing.T) {
-	t.Parallel()
 	resp := &InitProducerIDResponse{
 		ThrottleTime:  100 * time.Millisecond,
 		ProducerID:    8000,
diff --git a/join_group_request_test.go b/join_group_request_test.go
index bcdd85575..a2e17f980 100644
--- a/join_group_request_test.go
+++ b/join_group_request_test.go
@@ -34,7 +34,6 @@ var (
 )
 
 func TestJoinGroupRequest(t *testing.T) {
-	t.Parallel()
 	request := new(JoinGroupRequest)
 	request.GroupId = "TestGroup"
 	request.SessionTimeout = 100
@@ -43,7 +42,6 @@ func TestJoinGroupRequest(t *testing.T) {
 }
 
 func TestJoinGroupRequestV0_OneProtocol(t *testing.T) {
-	t.Parallel()
 	request := new(JoinGroupRequest)
 	request.GroupId = "TestGroup"
 	request.SessionTimeout = 100
@@ -57,7 +55,6 @@ func TestJoinGroupRequestV0_OneProtocol(t *testing.T) {
 }
 
 func TestJoinGroupRequestDeprecatedEncode(t *testing.T) {
-	t.Parallel()
 	request := new(JoinGroupRequest)
 	request.GroupId = "TestGroup"
 	request.SessionTimeout = 100
@@ -71,7 +68,6 @@ func TestJoinGroupRequestDeprecatedEncode(t *testing.T) {
 }
 
 func TestJoinGroupRequestV1(t *testing.T) {
-	t.Parallel()
 	request := new(JoinGroupRequest)
 	request.Version = 1
 	request.GroupId = "TestGroup"
diff --git a/join_group_response_test.go b/join_group_response_test.go
index 6ec1b643e..a43b37a95 100644
--- a/join_group_response_test.go
+++ b/join_group_response_test.go
@@ -56,7 +56,6 @@ var (
 )
 
 func TestJoinGroupResponseV0(t *testing.T) {
-	t.Parallel()
 	var response *JoinGroupResponse
 
 	response = new(JoinGroupResponse)
@@ -118,7 +117,6 @@ func TestJoinGroupResponseV0(t *testing.T) {
 }
 
 func TestJoinGroupResponseV1(t *testing.T) {
-	t.Parallel()
 	response := new(JoinGroupResponse)
 	testVersionDecodable(t, "no error", response, joinGroupResponseV1, 1)
 	if response.Err != ErrNoError {
@@ -145,7 +143,6 @@ func TestJoinGroupResponseV1(t *testing.T) {
 }
 
 func TestJoinGroupResponseV2(t *testing.T) {
-	t.Parallel()
 	response := new(JoinGroupResponse)
 	testVersionDecodable(t, "no error", response, joinGroupResponseV2, 2)
 	if response.ThrottleTime != 100 {
diff --git a/kerberos_client_test.go b/kerberos_client_test.go
index b1a6d48fd..7c2ed31bc 100644
--- a/kerberos_client_test.go
+++ b/kerberos_client_test.go
@@ -58,7 +58,6 @@ const (
 )
 
 func TestFaildToCreateKerberosConfig(t *testing.T) {
-	t.Parallel()
 	expectedErr := errors.New("configuration file could not be opened: krb5.conf open krb5.conf: no such file or directory")
 	clientConfig := NewTestConfig()
 	clientConfig.Net.SASL.Mechanism = SASLTypeGSSAPI
@@ -77,7 +76,6 @@ func TestFaildToCreateKerberosConfig(t *testing.T) {
 }
 
 func TestCreateWithPassword(t *testing.T) {
-	t.Parallel()
 	kerberosConfig, err := krbcfg.NewFromString(krb5cfg)
 	if err != nil {
 		t.Fatal(err)
@@ -108,7 +106,6 @@ func TestCreateWithPassword(t *testing.T) {
 }
 
 func TestCreateWithKeyTab(t *testing.T) {
-	t.Parallel()
 	kerberosConfig, err := krbcfg.NewFromString(krb5cfg)
 	if err != nil {
 		t.Fatal(err)
@@ -131,7 +128,6 @@ func TestCreateWithKeyTab(t *testing.T) {
 }
 
 func TestCreateWithDisablePAFXFAST(t *testing.T) {
-	t.Parallel()
 	kerberosConfig, err := krbcfg.NewFromString(krb5cfg)
 	if err != nil {
 		t.Fatal(err)
diff --git a/leave_group_request_test.go b/leave_group_request_test.go
index 978c44962..b674e48b2 100644
--- a/leave_group_request_test.go
+++ b/leave_group_request_test.go
@@ -8,7 +8,6 @@ var basicLeaveGroupRequest = []byte{
 }
 
 func TestLeaveGroupRequest(t *testing.T) {
-	t.Parallel()
 	request := new(LeaveGroupRequest)
 	request.GroupId = "foo"
 	request.MemberId = "bar"
diff --git a/leave_group_response_test.go b/leave_group_response_test.go
index 4a24334cc..9207c6668 100644
--- a/leave_group_response_test.go
+++ b/leave_group_response_test.go
@@ -8,7 +8,6 @@ var (
 )
 
 func TestLeaveGroupResponse(t *testing.T) {
-	t.Parallel()
 	var response *LeaveGroupResponse
 
 	response = new(LeaveGroupResponse)
diff --git a/list_groups_request_test.go b/list_groups_request_test.go
index f5d06da16..2e977d9a5 100644
--- a/list_groups_request_test.go
+++ b/list_groups_request_test.go
@@ -3,6 +3,5 @@ package sarama
 import "testing"
 
 func TestListGroupsRequest(t *testing.T) {
-	t.Parallel()
 	testRequest(t, "ListGroupsRequest", &ListGroupsRequest{}, []byte{})
 }
diff --git a/list_groups_response_test.go b/list_groups_response_test.go
index 1c21279d2..41ab822f9 100644
--- a/list_groups_response_test.go
+++ b/list_groups_response_test.go
@@ -24,7 +24,6 @@ var (
 )
 
 func TestListGroupsResponse(t *testing.T) {
-	t.Parallel()
 	var response *ListGroupsResponse
 
 	response = new(ListGroupsResponse)
diff --git a/list_partition_reassignments_request_test.go b/list_partition_reassignments_request_test.go
index ec5215b6e..e50b289b9 100644
--- a/list_partition_reassignments_request_test.go
+++ b/list_partition_reassignments_request_test.go
@@ -12,7 +12,6 @@ var listPartitionReassignmentsRequestOneBlock = []byte{
 }
 
 func TestListPartitionReassignmentRequest(t *testing.T) {
-	t.Parallel()
 	var request *ListPartitionReassignmentsRequest = &ListPartitionReassignmentsRequest{
 		TimeoutMs: int32(10000),
 		Version:   int16(0),
diff --git a/list_partition_reassignments_response_test.go b/list_partition_reassignments_response_test.go
index 85338ab40..71532423d 100644
--- a/list_partition_reassignments_response_test.go
+++ b/list_partition_reassignments_response_test.go
@@ -17,7 +17,6 @@ var listPartitionReassignmentsResponse = []byte{
 }
 
 func TestListPartitionReassignmentResponse(t *testing.T) {
-	t.Parallel()
 	var response *ListPartitionReassignmentsResponse = &ListPartitionReassignmentsResponse{
 		ThrottleTimeMs: int32(10000),
 		Version:        int16(0),
diff --git a/message_test.go b/message_test.go
index 134130298..a6c7cff2a 100644
--- a/message_test.go
+++ b/message_test.go
@@ -117,7 +117,6 @@ var (
 )
 
 func TestMessageEncoding(t *testing.T) {
-	t.Parallel()
 	message := Message{}
 	testEncodable(t, "empty", &message, emptyMessage)
 
@@ -139,7 +138,6 @@ func TestMessageEncoding(t *testing.T) {
 }
 
 func TestMessageDecoding(t *testing.T) {
-	t.Parallel()
 	message := Message{}
 	testDecodable(t, "empty", &message, emptyMessage)
 	if message.Codec != CompressionNone {
@@ -168,7 +166,6 @@ func TestMessageDecoding(t *testing.T) {
 }
 
 func TestMessageDecodingBulkSnappy(t *testing.T) {
-	t.Parallel()
 	message := Message{}
 	testDecodable(t, "bulk snappy", &message, emptyBulkSnappyMessage)
 	if message.Codec != CompressionSnappy {
@@ -185,7 +182,6 @@ func TestMessageDecodingBulkSnappy(t *testing.T) {
 }
 
 func TestMessageDecodingBulkGzip(t *testing.T) {
-	t.Parallel()
 	message := Message{}
 	testDecodable(t, "bulk gzip", &message, emptyBulkGzipMessage)
 	if message.Codec != CompressionGZIP {
@@ -202,7 +198,6 @@ func TestMessageDecodingBulkGzip(t *testing.T) {
 }
 
 func TestMessageDecodingBulkLZ4(t *testing.T) {
-	t.Parallel()
 	message := Message{}
 	testDecodable(t, "bulk lz4", &message, emptyBulkLZ4Message)
 	if message.Codec != CompressionLZ4 {
@@ -219,7 +214,6 @@ func TestMessageDecodingBulkLZ4(t *testing.T) {
 }
 
 func TestMessageDecodingBulkZSTD(t *testing.T) {
-	t.Parallel()
 	message := Message{}
 	testDecodable(t, "bulk zstd", &message, emptyBulkZSTDMessage)
 	if message.Codec != CompressionZSTD {
@@ -236,13 +230,11 @@ func TestMessageDecodingBulkZSTD(t *testing.T) {
 }
 
 func TestMessageDecodingVersion1(t *testing.T) {
-	t.Parallel()
 	message := Message{Version: 1}
 	testDecodable(t, "decoding empty v1 message", &message, emptyV1Message)
 }
 
 func TestMessageDecodingUnknownVersions(t *testing.T) {
-	t.Parallel()
 	message := Message{Version: 2}
 	err := decode(emptyV2Message, &message)
 	if err == nil {
diff --git a/metadata_request_test.go b/metadata_request_test.go
index c71dc7c82..16f6b5942 100644
--- a/metadata_request_test.go
+++ b/metadata_request_test.go
@@ -63,7 +63,6 @@ var (
 )
 
 func TestMetadataRequestV0(t *testing.T) {
-	t.Parallel()
 	request := new(MetadataRequest)
 	testRequest(t, "no topics", request, metadataRequestNoTopicsV0)
 
@@ -75,7 +74,6 @@ func TestMetadataRequestV0(t *testing.T) {
 }
 
 func TestMetadataRequestV1(t *testing.T) {
-	t.Parallel()
 	request := new(MetadataRequest)
 	request.Version = 1
 	testRequest(t, "no topics", request, metadataRequestNoTopicsV1)
@@ -88,7 +86,6 @@ func TestMetadataRequestV1(t *testing.T) {
 }
 
 func TestMetadataRequestV2(t *testing.T) {
-	t.Parallel()
 	request := new(MetadataRequest)
 	request.Version = 2
 	testRequest(t, "no topics", request, metadataRequestNoTopicsV2)
@@ -101,7 +98,6 @@ func TestMetadataRequestV2(t *testing.T) {
 }
 
 func TestMetadataRequestV3(t *testing.T) {
-	t.Parallel()
 	request := new(MetadataRequest)
 	request.Version = 3
 	testRequest(t, "no topics", request, metadataRequestNoTopicsV3)
@@ -114,7 +110,6 @@ func TestMetadataRequestV3(t *testing.T) {
 }
 
 func TestMetadataRequestV4(t *testing.T) {
-	t.Parallel()
 	request := new(MetadataRequest)
 	request.Version = 4
 	testRequest(t, "no topics", request, metadataRequestNoTopicsV4)
@@ -129,7 +124,6 @@ func TestMetadataRequestV4(t *testing.T) {
 }
 
 func TestMetadataRequestV5(t *testing.T) {
-	t.Parallel()
 	request := new(MetadataRequest)
 	request.Version = 5
 	testRequest(t, "no topics", request, metadataRequestNoTopicsV5)
diff --git a/metadata_response_test.go b/metadata_response_test.go
index 248d9b05c..3970a2f31 100644
--- a/metadata_response_test.go
+++ b/metadata_response_test.go
@@ -109,7 +109,6 @@ var (
 )
 
 func TestEmptyMetadataResponseV0(t *testing.T) {
-	t.Parallel()
 	response := MetadataResponse{}
 
 	testVersionDecodable(t, "empty, V0", &response, emptyMetadataResponseV0, 0)
@@ -122,7 +121,6 @@ func TestEmptyMetadataResponseV0(t *testing.T) {
 }
 
 func TestMetadataResponseWithBrokersV0(t *testing.T) {
-	t.Parallel()
 	response := MetadataResponse{}
 
 	testVersionDecodable(t, "brokers, no topics, V0", &response, brokersNoTopicsMetadataResponseV0, 0)
@@ -149,7 +147,6 @@ func TestMetadataResponseWithBrokersV0(t *testing.T) {
 }
 
 func TestMetadataResponseWithTopicsV0(t *testing.T) {
-	t.Parallel()
 	response := MetadataResponse{}
 
 	testVersionDecodable(t, "topics, no brokers, V0", &response, topicsNoBrokersMetadataResponseV0, 0)
@@ -212,7 +209,6 @@ func TestMetadataResponseWithTopicsV0(t *testing.T) {
 }
 
 func TestMetadataResponseWithBrokersV1(t *testing.T) {
-	t.Parallel()
 	response := MetadataResponse{}
 
 	testVersionDecodable(t, "topics, V1", &response, brokersNoTopicsMetadataResponseV1, 1)
@@ -234,7 +230,6 @@ func TestMetadataResponseWithBrokersV1(t *testing.T) {
 }
 
 func TestMetadataResponseWithTopicsV1(t *testing.T) {
-	t.Parallel()
 	response := MetadataResponse{}
 
 	testVersionDecodable(t, "topics, V1", &response, topicsNoBrokersMetadataResponseV1, 1)
@@ -256,7 +251,6 @@ func TestMetadataResponseWithTopicsV1(t *testing.T) {
 }
 
 func TestMetadataResponseWithThrottleTime(t *testing.T) {
-	t.Parallel()
 	response := MetadataResponse{}
 
 	testVersionDecodable(t, "no topics, no brokers, throttle time and cluster Id V3", &response, noBrokersNoTopicsWithThrottleTimeAndClusterIDV3, 3)
@@ -278,7 +272,6 @@ func TestMetadataResponseWithThrottleTime(t *testing.T) {
 }
 
 func TestMetadataResponseWithOfflineReplicasV5(t *testing.T) {
-	t.Parallel()
 	response := MetadataResponse{}
 
 	testVersionDecodable(t, "no brokers, 1 topic with offline replica V5", &response, noBrokersOneTopicWithOfflineReplicasV5, 5)
diff --git a/metrics_test.go b/metrics_test.go
index 7491196d7..7572f5b90 100644
--- a/metrics_test.go
+++ b/metrics_test.go
@@ -7,7 +7,6 @@ import (
 )
 
 func TestGetOrRegisterHistogram(t *testing.T) {
-	t.Parallel()
 	metricRegistry := metrics.NewRegistry()
 	histogram := getOrRegisterHistogram("name", metricRegistry)
 
@@ -31,7 +30,6 @@ func TestGetOrRegisterHistogram(t *testing.T) {
 }
 
 func TestGetMetricNameForBroker(t *testing.T) {
-	t.Parallel()
 	metricName := getMetricNameForBroker("name", &Broker{id: 1})
 
 	if metricName != "name-for-broker-1" {
diff --git a/mocks/async_producer_test.go b/mocks/async_producer_test.go
index 666c93b05..29ed9238f 100644
--- a/mocks/async_producer_test.go
+++ b/mocks/async_producer_test.go
@@ -36,7 +36,6 @@ func (trm *testReporterMock) Errorf(format string, args ...interface{}) {
 }
 
 func TestMockAsyncProducerImplementsAsyncProducerInterface(t *testing.T) {
-	t.Parallel()
 	var mp interface{} = &AsyncProducer{}
 	if _, ok := mp.(sarama.AsyncProducer); !ok {
 		t.Error("The mock producer should implement the sarama.Producer interface.")
@@ -44,7 +43,6 @@ func TestMockAsyncProducerImplementsAsyncProducerInterface(t *testing.T) {
 }
 
 func TestProducerReturnsExpectationsToChannels(t *testing.T) {
-	t.Parallel()
 	config := NewTestConfig()
 	config.Producer.Return.Successes = true
 	mp := NewAsyncProducer(t, config).
@@ -78,7 +76,6 @@ func TestProducerReturnsExpectationsToChannels(t *testing.T) {
 }
 
 func TestProducerWithTooFewExpectations(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	mp := NewAsyncProducer(trm, nil)
 	mp.ExpectInputAndSucceed()
@@ -96,7 +93,6 @@ func TestProducerWithTooFewExpectations(t *testing.T) {
 }
 
 func TestProducerWithTooManyExpectations(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	mp := NewAsyncProducer(trm, nil).
 		ExpectInputAndSucceed().
@@ -113,7 +109,6 @@ func TestProducerWithTooManyExpectations(t *testing.T) {
 }
 
 func TestProducerWithCheckerFunction(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	mp := NewAsyncProducer(trm, nil).
 		ExpectInputWithCheckerFunctionAndSucceed(generateRegexpChecker("^tes")).
@@ -136,7 +131,6 @@ func TestProducerWithCheckerFunction(t *testing.T) {
 }
 
 func TestProducerWithBrokenPartitioner(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	config := sarama.NewConfig()
 	config.Producer.Partitioner = func(string) sarama.Partitioner {
diff --git a/mocks/consumer_test.go b/mocks/consumer_test.go
index 2efe183d1..2a408af97 100644
--- a/mocks/consumer_test.go
+++ b/mocks/consumer_test.go
@@ -8,7 +8,6 @@ import (
 )
 
 func TestMockConsumerImplementsConsumerInterface(t *testing.T) {
-	t.Parallel()
 	var c interface{} = &Consumer{}
 	if _, ok := c.(sarama.Consumer); !ok {
 		t.Error("The mock consumer should implement the sarama.Consumer interface.")
@@ -21,7 +20,6 @@ func TestMockConsumerImplementsConsumerInterface(t *testing.T) {
 }
 
 func TestConsumerHandlesExpectations(t *testing.T) {
-	t.Parallel()
 	consumer := NewConsumer(t, NewTestConfig())
 	defer func() {
 		if err := consumer.Close(); err != nil {
@@ -67,7 +65,6 @@ func TestConsumerHandlesExpectations(t *testing.T) {
 }
 
 func TestConsumerHandlesExpectationsPausingResuming(t *testing.T) {
-	t.Parallel()
 	consumer := NewConsumer(t, NewTestConfig())
 	defer func() {
 		if err := consumer.Close(); err != nil {
@@ -147,7 +144,6 @@ func TestConsumerHandlesExpectationsPausingResuming(t *testing.T) {
 }
 
 func TestConsumerReturnsNonconsumedErrorsOnClose(t *testing.T) {
-	t.Parallel()
 	consumer := NewConsumer(t, NewTestConfig())
 	consumer.ExpectConsumePartition("test", 0, sarama.OffsetOldest).YieldError(sarama.ErrOutOfBrokers)
 	consumer.ExpectConsumePartition("test", 0, sarama.OffsetOldest).YieldError(sarama.ErrOutOfBrokers)
@@ -173,7 +169,6 @@ func TestConsumerReturnsNonconsumedErrorsOnClose(t *testing.T) {
 }
 
 func TestConsumerWithoutExpectationsOnPartition(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
 
@@ -192,7 +187,6 @@ func TestConsumerWithoutExpectationsOnPartition(t *testing.T) {
 }
 
 func TestConsumerWithExpectationsOnUnconsumedPartition(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
 	consumer.ExpectConsumePartition("test", 0, sarama.OffsetOldest).YieldMessage(&sarama.ConsumerMessage{Value: []byte("hello world")})
@@ -207,7 +201,6 @@ func TestConsumerWithExpectationsOnUnconsumedPartition(t *testing.T) {
 }
 
 func TestConsumerWithWrongOffsetExpectation(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
 	consumer.ExpectConsumePartition("test", 0, sarama.OffsetOldest)
@@ -227,7 +220,6 @@ func TestConsumerWithWrongOffsetExpectation(t *testing.T) {
 }
 
 func TestConsumerViolatesMessagesDrainedExpectation(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
 	consumer.ExpectConsumePartition("test", 0, sarama.OffsetOldest).
@@ -253,7 +245,6 @@ func TestConsumerViolatesMessagesDrainedExpectation(t *testing.T) {
 }
 
 func TestConsumerMeetsErrorsDrainedExpectation(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
 
@@ -281,7 +272,6 @@ func TestConsumerMeetsErrorsDrainedExpectation(t *testing.T) {
 }
 
 func TestConsumerTopicMetadata(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
 
@@ -325,7 +315,6 @@ func TestConsumerTopicMetadata(t *testing.T) {
 }
 
 func TestConsumerUnexpectedTopicMetadata(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
 
@@ -339,7 +328,6 @@ func TestConsumerUnexpectedTopicMetadata(t *testing.T) {
 }
 
 func TestConsumerOffsetsAreManagedCorrectlyWithOffsetOldest(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
 	pcmock := consumer.ExpectConsumePartition("test", 0, sarama.OffsetOldest)
@@ -372,7 +360,6 @@ func TestConsumerOffsetsAreManagedCorrectlyWithOffsetOldest(t *testing.T) {
 }
 
 func TestConsumerOffsetsAreManagedCorrectlyWithSpecifiedOffset(t *testing.T) {
-	t.Parallel()
 	startingOffset := int64(123)
 	trm := newTestReporterMock()
 	consumer := NewConsumer(trm, NewTestConfig())
diff --git a/mocks/sync_producer_test.go b/mocks/sync_producer_test.go
index 00b876394..ca1f65f5d 100644
--- a/mocks/sync_producer_test.go
+++ b/mocks/sync_producer_test.go
@@ -9,7 +9,6 @@ import (
 )
 
 func TestMockSyncProducerImplementsSyncProducerInterface(t *testing.T) {
-	t.Parallel()
 	var mp interface{} = &SyncProducer{}
 	if _, ok := mp.(sarama.SyncProducer); !ok {
 		t.Error("The mock async producer should implement the sarama.SyncProducer interface.")
@@ -17,7 +16,6 @@ func TestMockSyncProducerImplementsSyncProducerInterface(t *testing.T) {
 }
 
 func TestSyncProducerReturnsExpectationsToSendMessage(t *testing.T) {
-	t.Parallel()
 	sp := NewSyncProducer(t, nil)
 	defer func() {
 		if err := sp.Close(); err != nil {
@@ -58,7 +56,6 @@ func TestSyncProducerReturnsExpectationsToSendMessage(t *testing.T) {
 }
 
 func TestSyncProducerWithTooManyExpectations(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 
 	sp := NewSyncProducer(trm, nil).
@@ -80,7 +77,6 @@ func TestSyncProducerWithTooManyExpectations(t *testing.T) {
 }
 
 func TestSyncProducerWithTooFewExpectations(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 
 	sp := NewSyncProducer(trm, nil).ExpectSendMessageAndSucceed()
@@ -103,7 +99,6 @@ func TestSyncProducerWithTooFewExpectations(t *testing.T) {
 }
 
 func TestSyncProducerWithCheckerFunction(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 
 	sp := NewSyncProducer(trm, nil).
@@ -129,7 +124,6 @@ func TestSyncProducerWithCheckerFunction(t *testing.T) {
 }
 
 func TestSyncProducerWithCheckerFunctionForSendMessagesWithError(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 
 	sp := NewSyncProducer(trm, nil).
@@ -154,7 +148,6 @@ func TestSyncProducerWithCheckerFunctionForSendMessagesWithError(t *testing.T) {
 }
 
 func TestSyncProducerWithCheckerFunctionForSendMessagesWithoutError(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 
 	sp := NewSyncProducer(trm, nil).
@@ -184,7 +177,6 @@ func TestSyncProducerWithCheckerFunctionForSendMessagesWithoutError(t *testing.T
 }
 
 func TestSyncProducerSendMessagesExpectationsMismatchTooFew(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 
 	sp := NewSyncProducer(trm, nil).
@@ -209,7 +201,6 @@ func TestSyncProducerSendMessagesExpectationsMismatchTooFew(t *testing.T) {
 }
 
 func TestSyncProducerSendMessagesExpectationsMismatchTooMany(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 
 	sp := NewSyncProducer(trm, nil).
@@ -233,7 +224,6 @@ func TestSyncProducerSendMessagesExpectationsMismatchTooMany(t *testing.T) {
 }
 
 func TestSyncProducerSendMessagesFaultyEncoder(t *testing.T) {
-	t.Parallel()
 	trm := newTestReporterMock()
 
 	sp := NewSyncProducer(trm, nil).
diff --git a/offset_commit_request_test.go b/offset_commit_request_test.go
index 8d6ba003b..06bbd4036 100644
--- a/offset_commit_request_test.go
+++ b/offset_commit_request_test.go
@@ -64,7 +64,6 @@ var (
 )
 
 func TestOffsetCommitRequestV0(t *testing.T) {
-	t.Parallel()
 	request := new(OffsetCommitRequest)
 	request.Version = 0
 	request.ConsumerGroup = "foobar"
@@ -75,7 +74,6 @@ func TestOffsetCommitRequestV0(t *testing.T) {
 }
 
 func TestOffsetCommitRequestV1(t *testing.T) {
-	t.Parallel()
 	request := new(OffsetCommitRequest)
 	request.ConsumerGroup = "foobar"
 	request.ConsumerID = "cons"
@@ -88,7 +86,6 @@ func TestOffsetCommitRequestV1(t *testing.T) {
 }
 
 func TestOffsetCommitRequestV2ToV4(t *testing.T) {
-	t.Parallel()
 	for version := 2; version <= 4; version++ {
 		request := new(OffsetCommitRequest)
 		request.ConsumerGroup = "foobar"
diff --git a/offset_commit_response_test.go b/offset_commit_response_test.go
index 7e0bb295c..f35ca54ec 100644
--- a/offset_commit_response_test.go
+++ b/offset_commit_response_test.go
@@ -10,13 +10,11 @@ var emptyOffsetCommitResponse = []byte{
 }
 
 func TestEmptyOffsetCommitResponse(t *testing.T) {
-	t.Parallel()
 	response := OffsetCommitResponse{}
 	testResponse(t, "empty", &response, emptyOffsetCommitResponse)
 }
 
 func TestNormalOffsetCommitResponse(t *testing.T) {
-	t.Parallel()
 	response := OffsetCommitResponse{}
 	response.AddError("t", 0, ErrNotLeaderForPartition)
 	response.Errors["m"] = make(map[int32]KError)
@@ -26,7 +24,6 @@ func TestNormalOffsetCommitResponse(t *testing.T) {
 }
 
 func TestOffsetCommitResponseWithThrottleTime(t *testing.T) {
-	t.Parallel()
 	for version := 3; version <= 4; version++ {
 		response := OffsetCommitResponse{
 			Version:        int16(version),
diff --git a/offset_fetch_request_test.go b/offset_fetch_request_test.go
index 6657b05e5..d4497a8b8 100644
--- a/offset_fetch_request_test.go
+++ b/offset_fetch_request_test.go
@@ -55,7 +55,6 @@ var (
 )
 
 func TestOffsetFetchRequestNoPartitions(t *testing.T) {
-	t.Parallel()
 	for version := 0; version <= 5; version++ {
 		request := new(OffsetFetchRequest)
 		request.Version = int16(version)
@@ -89,7 +88,6 @@ func TestOffsetFetchRequestNoPartitions(t *testing.T) {
 }
 
 func TestOffsetFetchRequest(t *testing.T) {
-	t.Parallel()
 	for version := 0; version <= 5; version++ {
 		request := new(OffsetFetchRequest)
 		request.Version = int16(version)
@@ -118,7 +116,6 @@ func TestOffsetFetchRequest(t *testing.T) {
 }
 
 func TestOffsetFetchRequestAllPartitions(t *testing.T) {
-	t.Parallel()
 	for version := 2; version <= 5; version++ {
 		request := &OffsetFetchRequest{Version: int16(version), ConsumerGroup: "blah"}
 		testRequest(t, fmt.Sprintf("all partitions %d", version), request, offsetFetchRequestAllPartitions)
diff --git a/offset_fetch_response_test.go b/offset_fetch_response_test.go
index 2801a46d9..d70894ab2 100644
--- a/offset_fetch_response_test.go
+++ b/offset_fetch_response_test.go
@@ -23,7 +23,6 @@ var (
 )
 
 func TestEmptyOffsetFetchResponse(t *testing.T) {
-	t.Parallel()
 	for version := 0; version <= 1; version++ {
 		response := OffsetFetchResponse{Version: int16(version)}
 		testResponse(t, fmt.Sprintf("empty v%d", version), &response, emptyOffsetFetchResponse)
@@ -42,7 +41,6 @@ func TestNormalOffsetFetchResponse(t *testing.T) {
 	// The response encoded form cannot be checked for it varies due to
 	// unpredictable map traversal order.
 	// Hence the 'nil' as byte[] parameter in the 'testResponse(..)' calls
-	t.Parallel()
 
 	for version := 0; version <= 1; version++ {
 		response := OffsetFetchResponse{Version: int16(version)}
diff --git a/offset_manager_test.go b/offset_manager_test.go
index 36ea0a0d2..3aff080f6 100644
--- a/offset_manager_test.go
+++ b/offset_manager_test.go
@@ -72,7 +72,6 @@ func initPartitionOffsetManager(t *testing.T, om OffsetManager,
 }
 
 func TestNewOffsetManager(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	seedBroker.Returns(new(MetadataResponse))
 	defer seedBroker.Close()
@@ -118,12 +117,10 @@ var offsetsautocommitTestTable = []struct {
 }
 
 func TestNewOffsetManagerOffsetsAutoCommit(t *testing.T) {
-	t.Parallel()
 	// Tests to validate configuration of `Consumer.Offsets.AutoCommit.Enable`
 	for _, tt := range offsetsautocommitTestTable {
 		tt := tt
 		t.Run(tt.name, func(t *testing.T) {
-			t.Parallel()
 			config := NewTestConfig()
 			if tt.set {
 				config.Consumer.Offsets.AutoCommit.Enable = tt.enable
@@ -174,7 +171,6 @@ func TestNewOffsetManagerOffsetsAutoCommit(t *testing.T) {
 }
 
 func TestNewOffsetManagerOffsetsManualCommit(t *testing.T) {
-	t.Parallel()
 	// Tests to validate configuration when `Consumer.Offsets.AutoCommit.Enable` is false
 	config := NewTestConfig()
 	config.Consumer.Offsets.AutoCommit.Enable = false
@@ -235,7 +231,6 @@ func TestNewOffsetManagerOffsetsManualCommit(t *testing.T) {
 // Test recovery from ErrNotCoordinatorForConsumer
 // on first fetchInitialOffset call
 func TestOffsetManagerFetchInitialFail(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, 0)
 
 	// Error on first fetchInitialOffset call
@@ -279,7 +274,6 @@ func TestOffsetManagerFetchInitialFail(t *testing.T) {
 
 // Test fetchInitialOffset retry on ErrOffsetsLoadInProgress
 func TestOffsetManagerFetchInitialLoadInProgress(t *testing.T) {
-	t.Parallel()
 	retryCount := int32(0)
 	backoff := func(retries, maxRetries int) time.Duration {
 		atomic.AddInt32(&retryCount, 1)
@@ -322,7 +316,6 @@ func TestOffsetManagerFetchInitialLoadInProgress(t *testing.T) {
 }
 
 func TestPartitionOffsetManagerInitialOffset(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, 0)
 	testClient.Config().Consumer.Offsets.Initial = OffsetOldest
 
@@ -345,7 +338,6 @@ func TestPartitionOffsetManagerInitialOffset(t *testing.T) {
 }
 
 func TestPartitionOffsetManagerNextOffset(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, 0)
 	pom := initPartitionOffsetManager(t, om, coordinator, 5, "test_meta")
 
@@ -365,7 +357,6 @@ func TestPartitionOffsetManagerNextOffset(t *testing.T) {
 }
 
 func TestPartitionOffsetManagerResetOffset(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, 0)
 	pom := initPartitionOffsetManager(t, om, coordinator, 5, "original_meta")
 
@@ -392,7 +383,6 @@ func TestPartitionOffsetManagerResetOffset(t *testing.T) {
 }
 
 func TestPartitionOffsetManagerResetOffsetWithRetention(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, time.Hour)
 	pom := initPartitionOffsetManager(t, om, coordinator, 5, "original_meta")
 
@@ -429,7 +419,6 @@ func TestPartitionOffsetManagerResetOffsetWithRetention(t *testing.T) {
 }
 
 func TestPartitionOffsetManagerMarkOffset(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, 0)
 	pom := initPartitionOffsetManager(t, om, coordinator, 5, "original_meta")
 
@@ -455,7 +444,6 @@ func TestPartitionOffsetManagerMarkOffset(t *testing.T) {
 }
 
 func TestPartitionOffsetManagerMarkOffsetWithRetention(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, time.Hour)
 	pom := initPartitionOffsetManager(t, om, coordinator, 5, "original_meta")
 
@@ -491,7 +479,6 @@ func TestPartitionOffsetManagerMarkOffsetWithRetention(t *testing.T) {
 }
 
 func TestPartitionOffsetManagerCommitErr(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, 0)
 	pom := initPartitionOffsetManager(t, om, coordinator, 5, "meta")
 
@@ -556,7 +543,6 @@ func TestPartitionOffsetManagerCommitErr(t *testing.T) {
 
 // Test of recovery from abort
 func TestAbortPartitionOffsetManager(t *testing.T) {
-	t.Parallel()
 	om, testClient, broker, coordinator := initOffsetManager(t, 0)
 	pom := initPartitionOffsetManager(t, om, coordinator, 5, "meta")
 
diff --git a/offset_request_test.go b/offset_request_test.go
index 57dd5f7c7..8ea533a6b 100644
--- a/offset_request_test.go
+++ b/offset_request_test.go
@@ -49,7 +49,6 @@ var (
 )
 
 func TestOffsetRequest(t *testing.T) {
-	t.Parallel()
 	request := new(OffsetRequest)
 	testRequest(t, "no blocks", request, offsetRequestNoBlocksV1)
 
@@ -58,7 +57,6 @@ func TestOffsetRequest(t *testing.T) {
 }
 
 func TestOffsetRequestV1(t *testing.T) {
-	t.Parallel()
 	request := new(OffsetRequest)
 	request.Version = 1
 	testRequest(t, "no blocks", request, offsetRequestNoBlocksV1)
@@ -68,7 +66,6 @@ func TestOffsetRequestV1(t *testing.T) {
 }
 
 func TestOffsetRequestV2(t *testing.T) {
-	t.Parallel()
 	request := new(OffsetRequest)
 	request.Version = 2
 	testRequest(t, "no blocks", request, offsetRequestNoBlocksV2)
@@ -79,7 +76,6 @@ func TestOffsetRequestV2(t *testing.T) {
 }
 
 func TestOffsetRequestReplicaID(t *testing.T) {
-	t.Parallel()
 	request := new(OffsetRequest)
 	replicaID := int32(42)
 	request.SetReplicaID(replicaID)
diff --git a/offset_response_test.go b/offset_response_test.go
index 8dcb3bfdd..683c11e43 100644
--- a/offset_response_test.go
+++ b/offset_response_test.go
@@ -38,7 +38,6 @@ var (
 )
 
 func TestEmptyOffsetResponse(t *testing.T) {
-	t.Parallel()
 	response := OffsetResponse{}
 
 	testVersionDecodable(t, "empty", &response, emptyOffsetResponse, 0)
@@ -55,7 +54,6 @@ func TestEmptyOffsetResponse(t *testing.T) {
 }
 
 func TestNormalOffsetResponse(t *testing.T) {
-	t.Parallel()
 	response := OffsetResponse{}
 
 	testVersionDecodable(t, "normal", &response, normalOffsetResponse, 0)
@@ -86,7 +84,6 @@ func TestNormalOffsetResponse(t *testing.T) {
 }
 
 func TestNormalOffsetResponseV1(t *testing.T) {
-	t.Parallel()
 	response := OffsetResponse{}
 
 	testVersionDecodable(t, "normal", &response, normalOffsetResponseV1, 1)
diff --git a/partitioner_test.go b/partitioner_test.go
index 230f92c26..06a4ad725 100644
--- a/partitioner_test.go
+++ b/partitioner_test.go
@@ -27,7 +27,6 @@ func assertPartitioningConsistent(t *testing.T, partitioner Partitioner, message
 }
 
 func TestRandomPartitioner(t *testing.T) {
-	t.Parallel()
 	partitioner := NewRandomPartitioner("mytopic")
 
 	choice, err := partitioner.Partition(nil, 1)
@@ -50,7 +49,6 @@ func TestRandomPartitioner(t *testing.T) {
 }
 
 func TestRoundRobinPartitioner(t *testing.T) {
-	t.Parallel()
 	partitioner := NewRoundRobinPartitioner("mytopic")
 
 	choice, err := partitioner.Partition(nil, 1)
@@ -74,7 +72,6 @@ func TestRoundRobinPartitioner(t *testing.T) {
 }
 
 func TestNewHashPartitionerWithHasher(t *testing.T) {
-	t.Parallel()
 	// use the current default hasher fnv.New32a()
 	partitioner := NewCustomHashPartitioner(fnv.New32a)("mytopic")
 
@@ -106,7 +103,6 @@ func TestNewHashPartitionerWithHasher(t *testing.T) {
 }
 
 func TestHashPartitionerWithHasherMinInt32(t *testing.T) {
-	t.Parallel()
 	// use the current default hasher fnv.New32a()
 	partitioner := NewCustomHashPartitioner(fnv.New32a)("mytopic")
 
@@ -125,7 +121,6 @@ func TestHashPartitionerWithHasherMinInt32(t *testing.T) {
 }
 
 func TestHashPartitioner(t *testing.T) {
-	t.Parallel()
 	partitioner := NewHashPartitioner("mytopic")
 
 	choice, err := partitioner.Partition(&ProducerMessage{}, 1)
@@ -156,7 +151,6 @@ func TestHashPartitioner(t *testing.T) {
 }
 
 func TestHashPartitionerConsistency(t *testing.T) {
-	t.Parallel()
 	partitioner := NewHashPartitioner("mytopic")
 	ep, ok := partitioner.(DynamicConsistencyPartitioner)
 
@@ -175,7 +169,6 @@ func TestHashPartitionerConsistency(t *testing.T) {
 }
 
 func TestHashPartitionerMinInt32(t *testing.T) {
-	t.Parallel()
 	partitioner := NewHashPartitioner("mytopic")
 
 	msg := ProducerMessage{}
@@ -193,7 +186,6 @@ func TestHashPartitionerMinInt32(t *testing.T) {
 }
 
 func TestManualPartitioner(t *testing.T) {
-	t.Parallel()
 	partitioner := NewManualPartitioner("mytopic")
 
 	choice, err := partitioner.Partition(&ProducerMessage{}, 1)
@@ -216,7 +208,6 @@ func TestManualPartitioner(t *testing.T) {
 }
 
 func TestWithCustomFallbackPartitioner(t *testing.T) {
-	t.Parallel()
 	topic := "mytopic"
 
 	partitioner := NewCustomPartitioner(
diff --git a/produce_request_test.go b/produce_request_test.go
index 628b7f905..e8684ffd2 100644
--- a/produce_request_test.go
+++ b/produce_request_test.go
@@ -74,7 +74,6 @@ var (
 )
 
 func TestProduceRequest(t *testing.T) {
-	t.Parallel()
 	request := new(ProduceRequest)
 	testRequest(t, "empty", request, produceRequestEmpty)
 
diff --git a/produce_response_test.go b/produce_response_test.go
index b989e5a08..0509bb569 100644
--- a/produce_response_test.go
+++ b/produce_response_test.go
@@ -66,7 +66,6 @@ var (
 )
 
 func TestProduceResponseDecode(t *testing.T) {
-	t.Parallel()
 	response := ProduceResponse{}
 
 	testVersionDecodable(t, "no blocks", &response, produceResponseNoBlocksV0, 0)
@@ -113,7 +112,6 @@ func TestProduceResponseDecode(t *testing.T) {
 }
 
 func TestProduceResponseEncode(t *testing.T) {
-	t.Parallel()
 	response := ProduceResponse{}
 	response.Blocks = make(map[string]map[int32]*ProduceResponseBlock)
 	testEncodable(t, "empty", &response, produceResponseNoBlocksV0)
@@ -133,7 +131,6 @@ func TestProduceResponseEncode(t *testing.T) {
 }
 
 func TestProduceResponseEncodeInvalidTimestamp(t *testing.T) {
-	t.Parallel()
 	response := ProduceResponse{}
 	response.Version = 2
 	response.Blocks = make(map[string]map[int32]*ProduceResponseBlock)
diff --git a/produce_set_test.go b/produce_set_test.go
index 2dede467f..652d6d7d9 100644
--- a/produce_set_test.go
+++ b/produce_set_test.go
@@ -23,7 +23,6 @@ func safeAddMessage(t *testing.T, ps *produceSet, msg *ProducerMessage) {
 }
 
 func TestProduceSetInitial(t *testing.T) {
-	t.Parallel()
 	_, ps := makeProduceSet()
 
 	if !ps.empty() {
@@ -36,7 +35,6 @@ func TestProduceSetInitial(t *testing.T) {
 }
 
 func TestProduceSetAddingMessages(t *testing.T) {
-	t.Parallel()
 	_, ps := makeProduceSet()
 	msg := &ProducerMessage{Key: StringEncoder(TestMessage), Value: StringEncoder(TestMessage)}
 
@@ -52,7 +50,6 @@ func TestProduceSetAddingMessages(t *testing.T) {
 }
 
 func TestProduceSetAddingMessagesOverflowMessagesLimit(t *testing.T) {
-	t.Parallel()
 	parent, ps := makeProduceSet()
 	parent.conf.Producer.Flush.MaxMessages = 1000
 
@@ -71,7 +68,6 @@ func TestProduceSetAddingMessagesOverflowMessagesLimit(t *testing.T) {
 }
 
 func TestProduceSetAddingMessagesOverflowBytesLimit(t *testing.T) {
-	t.Parallel()
 	parent, ps := makeProduceSet()
 	parent.conf.Producer.MaxMessageBytes = 1000
 
@@ -90,7 +86,6 @@ func TestProduceSetAddingMessagesOverflowBytesLimit(t *testing.T) {
 }
 
 func TestProduceSetPartitionTracking(t *testing.T) {
-	t.Parallel()
 	_, ps := makeProduceSet()
 
 	m1 := &ProducerMessage{Topic: "t1", Partition: 0}
@@ -138,7 +133,6 @@ func TestProduceSetPartitionTracking(t *testing.T) {
 }
 
 func TestProduceSetRequestBuilding(t *testing.T) {
-	t.Parallel()
 	parent, ps := makeProduceSet()
 	parent.conf.Producer.RequiredAcks = WaitForAll
 	parent.conf.Producer.Timeout = 10 * time.Second
@@ -177,7 +171,6 @@ func TestProduceSetRequestBuilding(t *testing.T) {
 }
 
 func TestProduceSetCompressedRequestBuilding(t *testing.T) {
-	t.Parallel()
 	parent, ps := makeProduceSet()
 	parent.conf.Producer.RequiredAcks = WaitForAll
 	parent.conf.Producer.Timeout = 10 * time.Second
@@ -223,7 +216,6 @@ func TestProduceSetCompressedRequestBuilding(t *testing.T) {
 }
 
 func TestProduceSetV3RequestBuilding(t *testing.T) {
-	t.Parallel()
 	parent, ps := makeProduceSet()
 	parent.conf.Producer.RequiredAcks = WaitForAll
 	parent.conf.Producer.Timeout = 10 * time.Second
@@ -290,7 +282,6 @@ func TestProduceSetV3RequestBuilding(t *testing.T) {
 }
 
 func TestProduceSetIdempotentRequestBuilding(t *testing.T) {
-	t.Parallel()
 	const pID = 1000
 	const pEpoch = 1234
 
@@ -379,7 +370,6 @@ func TestProduceSetIdempotentRequestBuilding(t *testing.T) {
 }
 
 func TestProduceSetConsistentTimestamps(t *testing.T) {
-	t.Parallel()
 	parent, ps1 := makeProduceSet()
 	ps2 := newProduceSet(parent)
 	parent.conf.Producer.RequiredAcks = WaitForAll
diff --git a/record_test.go b/record_test.go
index b92b2e503..ba87feb4d 100644
--- a/record_test.go
+++ b/record_test.go
@@ -270,7 +270,6 @@ func isOldGo(t *testing.T) bool {
 }
 
 func TestRecordBatchEncoding(t *testing.T) {
-	t.Parallel()
 	for _, tc := range recordBatchTestCases() {
 		if tc.oldGoEncoded != nil && isOldGo(t) {
 			testEncodable(t, tc.name, &tc.batch, tc.oldGoEncoded)
@@ -281,7 +280,6 @@ func TestRecordBatchEncoding(t *testing.T) {
 }
 
 func TestRecordBatchDecoding(t *testing.T) {
-	t.Parallel()
 	for _, tc := range recordBatchTestCases() {
 		batch := RecordBatch{}
 		testDecodable(t, tc.name, &batch, tc.encoded)
diff --git a/records_test.go b/records_test.go
index fd985f56c..34f1b4a6e 100644
--- a/records_test.go
+++ b/records_test.go
@@ -7,7 +7,6 @@ import (
 )
 
 func TestLegacyRecords(t *testing.T) {
-	t.Parallel()
 	set := &MessageSet{
 		Messages: []*MessageBlock{
 			{
@@ -83,7 +82,6 @@ func TestLegacyRecords(t *testing.T) {
 }
 
 func TestDefaultRecords(t *testing.T) {
-	t.Parallel()
 	batch := &RecordBatch{
 		IsTransactional: true,
 		Version:         2,
diff --git a/response_header_test.go b/response_header_test.go
index 8a5daae1a..c7c68eae7 100644
--- a/response_header_test.go
+++ b/response_header_test.go
@@ -15,7 +15,6 @@ var (
 )
 
 func TestResponseHeaderV0(t *testing.T) {
-	t.Parallel()
 	header := responseHeader{}
 
 	testVersionDecodable(t, "response header", &header, responseHeaderBytesV0, 0)
@@ -28,7 +27,6 @@ func TestResponseHeaderV0(t *testing.T) {
 }
 
 func TestResponseHeaderV1(t *testing.T) {
-	t.Parallel()
 	header := responseHeader{}
 
 	testVersionDecodable(t, "response header", &header, responseHeaderBytesV1, 1)
diff --git a/sasl_authenticate_request_test.go b/sasl_authenticate_request_test.go
index ba3fe47e0..bf75004d2 100644
--- a/sasl_authenticate_request_test.go
+++ b/sasl_authenticate_request_test.go
@@ -7,7 +7,6 @@ var saslAuthenticateRequest = []byte{
 }
 
 func TestSaslAuthenticateRequest(t *testing.T) {
-	t.Parallel()
 	request := new(SaslAuthenticateRequest)
 	request.SaslAuthBytes = []byte(`foo`)
 	testRequest(t, "basic", request, saslAuthenticateRequest)
diff --git a/sasl_authenticate_response_test.go b/sasl_authenticate_response_test.go
index 018bdd35a..048dade19 100644
--- a/sasl_authenticate_response_test.go
+++ b/sasl_authenticate_response_test.go
@@ -9,7 +9,6 @@ var saslAuthenticatResponseErr = []byte{
 }
 
 func TestSaslAuthenticateResponse(t *testing.T) {
-	t.Parallel()
 	response := new(SaslAuthenticateResponse)
 	response.Err = ErrSASLAuthenticationFailed
 	msg := "err"
diff --git a/sasl_handshake_request_test.go b/sasl_handshake_request_test.go
index 5940c2471..e100ad5b9 100644
--- a/sasl_handshake_request_test.go
+++ b/sasl_handshake_request_test.go
@@ -7,7 +7,6 @@ var baseSaslRequest = []byte{
 }
 
 func TestSaslHandshakeRequest(t *testing.T) {
-	t.Parallel()
 	request := new(SaslHandshakeRequest)
 	request.Mechanism = "foo"
 	testRequest(t, "basic", request, baseSaslRequest)
diff --git a/sasl_handshake_response_test.go b/sasl_handshake_response_test.go
index 780bcf577..40441fd85 100644
--- a/sasl_handshake_response_test.go
+++ b/sasl_handshake_response_test.go
@@ -9,7 +9,6 @@ var saslHandshakeResponse = []byte{
 }
 
 func TestSaslHandshakeResponse(t *testing.T) {
-	t.Parallel()
 	response := new(SaslHandshakeResponse)
 	testVersionDecodable(t, "no error", response, saslHandshakeResponse, 0)
 	if response.Err != ErrNoError {
diff --git a/scram_formatter_test.go b/scram_formatter_test.go
index 7c9f43bb3..b673a6a7d 100644
--- a/scram_formatter_test.go
+++ b/scram_formatter_test.go
@@ -36,7 +36,6 @@ public class App {
 */
 
 func TestScramSaltedPasswordSha512(t *testing.T) {
-	t.Parallel()
 	password := []byte("hello")
 	salt := []byte("world")
 
@@ -61,7 +60,6 @@ func TestScramSaltedPasswordSha512(t *testing.T) {
 }
 
 func TestScramSaltedPasswordSha256(t *testing.T) {
-	t.Parallel()
 	password := []byte("hello")
 	salt := []byte("world")
 
diff --git a/sticky_assignor_user_data_test.go b/sticky_assignor_user_data_test.go
index bca39be78..9eb09a615 100644
--- a/sticky_assignor_user_data_test.go
+++ b/sticky_assignor_user_data_test.go
@@ -6,7 +6,6 @@ import (
 )
 
 func TestStickyAssignorUserDataV0(t *testing.T) {
-	t.Parallel()
 	// Single topic with deterministic ordering across encode-decode
 	req := &StickyAssignorUserDataV0{}
 	data := decodeUserDataBytes(t, "AAAAAQADdDAzAAAAAQAAAAU=")
@@ -25,7 +24,6 @@ func TestStickyAssignorUserDataV0(t *testing.T) {
 }
 
 func TestStickyAssignorUserDataV1(t *testing.T) {
-	t.Parallel()
 	// Single topic with deterministic ordering across encode-decode
 	req := &StickyAssignorUserDataV1{}
 	data := decodeUserDataBytes(t, "AAAAAQADdDA2AAAAAgAAAAAAAAAE/////w==")
diff --git a/sync_group_request_test.go b/sync_group_request_test.go
index f03ae5f83..3f537ef9f 100644
--- a/sync_group_request_test.go
+++ b/sync_group_request_test.go
@@ -21,7 +21,6 @@ var (
 )
 
 func TestSyncGroupRequest(t *testing.T) {
-	t.Parallel()
 	var request *SyncGroupRequest
 
 	request = new(SyncGroupRequest)
diff --git a/sync_group_response_test.go b/sync_group_response_test.go
index 85faec4ad..6fb708858 100644
--- a/sync_group_response_test.go
+++ b/sync_group_response_test.go
@@ -18,7 +18,6 @@ var (
 )
 
 func TestSyncGroupResponse(t *testing.T) {
-	t.Parallel()
 	var response *SyncGroupResponse
 
 	response = new(SyncGroupResponse)
diff --git a/sync_producer_test.go b/sync_producer_test.go
index b59d872c8..5f14f7be0 100644
--- a/sync_producer_test.go
+++ b/sync_producer_test.go
@@ -7,7 +7,6 @@ import (
 )
 
 func TestSyncProducer(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -58,7 +57,6 @@ func TestSyncProducer(t *testing.T) {
 }
 
 func TestSyncProducerBatch(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -107,7 +105,6 @@ func TestSyncProducerBatch(t *testing.T) {
 }
 
 func TestConcurrentSyncProducer(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader := NewMockBroker(t, 2)
 
@@ -152,7 +149,6 @@ func TestConcurrentSyncProducer(t *testing.T) {
 }
 
 func TestSyncProducerToNonExistingTopic(t *testing.T) {
-	t.Parallel()
 	broker := NewMockBroker(t, 1)
 
 	metadataResponse := new(MetadataResponse)
@@ -184,7 +180,6 @@ func TestSyncProducerToNonExistingTopic(t *testing.T) {
 }
 
 func TestSyncProducerRecoveryWithRetriesDisabled(t *testing.T) {
-	t.Parallel()
 	seedBroker := NewMockBroker(t, 1)
 	leader1 := NewMockBroker(t, 2)
 	leader2 := NewMockBroker(t, 3)
diff --git a/txn_offset_commit_request_test.go b/txn_offset_commit_request_test.go
index 76f208ca6..714ec47eb 100644
--- a/txn_offset_commit_request_test.go
+++ b/txn_offset_commit_request_test.go
@@ -16,7 +16,6 @@ var txnOffsetCommitRequest = []byte{
 }
 
 func TestTxnOffsetCommitRequest(t *testing.T) {
-	t.Parallel()
 	req := &TxnOffsetCommitRequest{
 		TransactionalID: "txn",
 		GroupID:         "groupid",
diff --git a/txn_offset_commit_response_test.go b/txn_offset_commit_response_test.go
index 4f152fb77..b4caa69b9 100644
--- a/txn_offset_commit_response_test.go
+++ b/txn_offset_commit_response_test.go
@@ -15,7 +15,6 @@ var txnOffsetCommitResponse = []byte{
 }
 
 func TestTxnOffsetCommitResponse(t *testing.T) {
-	t.Parallel()
 	resp := &TxnOffsetCommitResponse{
 		ThrottleTime: 100 * time.Millisecond,
 		Topics: map[string][]*PartitionError{
diff --git a/utils_test.go b/utils_test.go
index a7448d07c..3d2c3ac89 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -3,7 +3,6 @@ package sarama
 import "testing"
 
 func TestVersionCompare(t *testing.T) {
-	t.Parallel()
 	if V0_8_2_0.IsAtLeast(V0_8_2_1) {
 		t.Error("0.8.2.0 >= 0.8.2.1")
 	}
@@ -28,7 +27,6 @@ func TestVersionCompare(t *testing.T) {
 }
 
 func TestVersionParsing(t *testing.T) {
-	t.Parallel()
 	validVersions := []string{
 		"0.8.2.0",
 		"0.8.2.1",