diff --git a/Gopkg.lock b/Gopkg.lock
index 1521eb2cd98cf..79bb78c10f05a 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -654,15 +654,15 @@
   revision = "c43482518d410361b6c383d7aebce33d0471d7bc"
 
 [[projects]]
-  branch = "master"
-  digest = "1:7fb6cc9607eaa6ef309edebc42b57f704244bd4b9ab23bff128829c4ad09b95d"
+  branch = "telegraf"
+  digest = "1:65e98c3d449a34fe4644b503148d3a7244ceabe13f8bf71c2cfecfc2bdce05e9"
   name = "github.com/influxdata/toml"
   packages = [
     ".",
     "ast",
   ]
   pruneopts = ""
-  revision = "2a2e3012f7cfbef64091cc79776311e65dfa211b"
+  revision = "270119a8ce653b297f12189c9099ef1409979f2b"
 
 [[projects]]
   branch = "master"
diff --git a/Gopkg.toml b/Gopkg.toml
index 057af5e3b3d24..568f9fda70a99 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -80,7 +80,7 @@
 
 [[constraint]]
   name = "github.com/influxdata/toml"
-  branch = "master"
+  branch = "telegraf"
 
 [[constraint]]
   name = "github.com/influxdata/wlog"
diff --git a/internal/config/config_test.go b/internal/config/config_test.go
index 77b0dffd40992..f05419eef770c 100644
--- a/internal/config/config_test.go
+++ b/internal/config/config_test.go
@@ -5,13 +5,17 @@ import (
 	"testing"
 	"time"
 
+	"github.com/influxdata/telegraf/internal"
 	"github.com/influxdata/telegraf/internal/models"
 	"github.com/influxdata/telegraf/plugins/inputs"
 	"github.com/influxdata/telegraf/plugins/inputs/exec"
+	"github.com/influxdata/telegraf/plugins/inputs/http_listener_v2"
 	"github.com/influxdata/telegraf/plugins/inputs/memcached"
 	"github.com/influxdata/telegraf/plugins/inputs/procstat"
+	httpOut "github.com/influxdata/telegraf/plugins/outputs/http"
 	"github.com/influxdata/telegraf/plugins/parsers"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestConfig_LoadSingleInputWithEnvVars(t *testing.T) {
@@ -176,3 +180,74 @@ func TestConfig_LoadDirectory(t *testing.T) {
 	assert.Equal(t, pConfig, c.Inputs[3].Config,
 		"Merged Testdata did not produce correct procstat metadata.")
 }
+
+func TestConfig_LoadSpecialTypes(t *testing.T) {
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/special_types.toml")
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(c.Inputs))
+
+	inputHTTPListener, ok := c.Inputs[0].Input.(*http_listener_v2.HTTPListenerV2)
+	assert.Equal(t, true, ok)
+	// Tests telegraf duration parsing.
+	assert.Equal(t, internal.Duration{Duration: time.Second}, inputHTTPListener.WriteTimeout)
+	// Tests telegraf size parsing.
+	assert.Equal(t, internal.Size{Size: 1024 * 1024}, inputHTTPListener.MaxBodySize)
+	// Tests toml multiline basic strings.
+	assert.Equal(t, "/path/to/my/cert\n", inputHTTPListener.TLSCert)
+}
+
+func TestConfig_FieldNotDefined(t *testing.T) {
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/invalid_field.toml")
+	require.Error(t, err, "invalid field name")
+	assert.Equal(t, "Error parsing ./testdata/invalid_field.toml, line 2: field corresponding to `not_a_field' is not defined in http_listener_v2.HTTPListenerV2", err.Error())
+
+}
+
+func TestConfig_WrongFieldType(t *testing.T) {
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/wrong_field_type.toml")
+	require.Error(t, err, "invalid field type")
+	assert.Equal(t, "Error parsing ./testdata/wrong_field_type.toml, line 2: (http_listener_v2.HTTPListenerV2.Port) cannot unmarshal TOML string into int", err.Error())
+
+	c = NewConfig()
+	err = c.LoadConfig("./testdata/wrong_field_type2.toml")
+	require.Error(t, err, "invalid field type2")
+	assert.Equal(t, "Error parsing ./testdata/wrong_field_type2.toml, line 2: (http_listener_v2.HTTPListenerV2.Methods) cannot unmarshal TOML string into []string", err.Error())
+}
+
+func TestConfig_InlineTables(t *testing.T) {
+	// #4098
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/inline_table.toml")
+	assert.NoError(t, err)
+	require.Equal(t, 2, len(c.Outputs))
+
+	outputHTTP, ok := c.Outputs[1].Output.(*httpOut.HTTP)
+	assert.Equal(t, true, ok)
+	assert.Equal(t, map[string]string{"Authorization": "Token $TOKEN", "Content-Type": "application/json"}, outputHTTP.Headers)
+	assert.Equal(t, []string{"org_id"}, c.Outputs[0].Config.Filter.TagInclude)
+}
+
+func TestConfig_SliceComment(t *testing.T) {
+	t.Skipf("Skipping until #3642 is resolved")
+
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/slice_comment.toml")
+	assert.NoError(t, err)
+	require.Equal(t, 1, len(c.Outputs))
+
+	outputHTTP, ok := c.Outputs[0].Output.(*httpOut.HTTP)
+	assert.Equal(t, []string{"test"}, outputHTTP.Scopes)
+	assert.Equal(t, true, ok)
+}
+
+func TestConfig_BadOrdering(t *testing.T) {
+	// #3444: when not using inline tables, care has to be taken so subsequent configuration
+	// doesn't become part of the table. This is not a bug, but TOML syntax.
+	c := NewConfig()
+	err := c.LoadConfig("./testdata/non_slice_slice.toml")
+	require.Error(t, err, "bad ordering")
+	assert.Equal(t, "Error parsing ./testdata/non_slice_slice.toml, line 4: cannot unmarshal TOML array into string (need slice)", err.Error())
+}
diff --git a/internal/config/testdata/inline_table.toml b/internal/config/testdata/inline_table.toml
new file mode 100644
index 0000000000000..525fdce17e389
--- /dev/null
+++ b/internal/config/testdata/inline_table.toml
@@ -0,0 +1,7 @@
+[[outputs.http]]
+    headers = { Authorization = "Token $TOKEN",Content-Type = "application/json" }
+    taginclude = ["org_id"]
+
+[[outputs.http]]
+    headers = { Authorization = "Token $TOKEN",Content-Type = "application/json" }
+    taginclude = ["org_id"]
diff --git a/internal/config/testdata/invalid_field.toml b/internal/config/testdata/invalid_field.toml
new file mode 100644
index 0000000000000..4c718d7bbe998
--- /dev/null
+++ b/internal/config/testdata/invalid_field.toml
@@ -0,0 +1,2 @@
+[[inputs.http_listener_v2]]
+  not_a_field = true
diff --git a/internal/config/testdata/non_slice_slice.toml b/internal/config/testdata/non_slice_slice.toml
new file mode 100644
index 0000000000000..f92edcc0b2383
--- /dev/null
+++ b/internal/config/testdata/non_slice_slice.toml
@@ -0,0 +1,4 @@
+[[outputs.http]]
+  [outputs.http.headers]
+    Content-Type = "application/json"
+  taginclude = ["org_id"]
diff --git a/internal/config/testdata/slice_comment.toml b/internal/config/testdata/slice_comment.toml
new file mode 100644
index 0000000000000..1177e5f8901e2
--- /dev/null
+++ b/internal/config/testdata/slice_comment.toml
@@ -0,0 +1,5 @@
+[[outputs.http]]
+  scopes = [
+    # comment
+    "test" # comment
+  ]
diff --git a/internal/config/testdata/special_types.toml b/internal/config/testdata/special_types.toml
new file mode 100644
index 0000000000000..24b73ae45f1d3
--- /dev/null
+++ b/internal/config/testdata/special_types.toml
@@ -0,0 +1,9 @@
+[[inputs.http_listener_v2]]
+  write_timeout = "1s"
+  max_body_size = "1MiB"
+  tls_cert = """
+/path/to/my/cert
+"""
+  tls_key = '''
+/path/to/my/key
+'''
diff --git a/internal/config/testdata/wrong_field_type.toml b/internal/config/testdata/wrong_field_type.toml
new file mode 100644
index 0000000000000..237176e7e54b4
--- /dev/null
+++ b/internal/config/testdata/wrong_field_type.toml
@@ -0,0 +1,2 @@
+[[inputs.http_listener_v2]]
+  port = "80"
diff --git a/internal/config/testdata/wrong_field_type2.toml b/internal/config/testdata/wrong_field_type2.toml
new file mode 100644
index 0000000000000..6f3def792e530
--- /dev/null
+++ b/internal/config/testdata/wrong_field_type2.toml
@@ -0,0 +1,2 @@
+[[inputs.http_listener_v2]]
+  methods = "POST"