diff --git a/destination_middleware_test.go b/destination_middleware_test.go
index 5349f96..7890c7e 100644
--- a/destination_middleware_test.go
+++ b/destination_middleware_test.go
@@ -40,18 +40,18 @@ func TestDestinationWithBatch_Open(t *testing.T) {
 	dst := NewMockDestination(gomock.NewController(t))
 	dst.EXPECT().Open(gomock.Any()).Return(nil)
 
-	mw := DestinationWithBatch{
+	underTest := DestinationWithBatch{
 		BatchSize:  10,
 		BatchDelay: 123 * time.Second,
 	}
-	d := mw.Wrap(dst)
+	d := underTest.Wrap(dst)
 
 	ctx := (&destinationWithBatch{}).setBatchConfig(context.Background(), DestinationWithBatch{})
 	err := d.Open(ctx)
 	is.NoErr(err)
 
 	is.NoErr(err)
-	is.Equal(mw, (&destinationWithBatch{}).getBatchConfig(ctx))
+	is.Equal(underTest, (&destinationWithBatch{}).getBatchConfig(ctx))
 }
 
 // -- DestinationWithRateLimit -------------------------------------------------
diff --git a/go.mod b/go.mod
index 987b81c..fa0ffe4 100644
--- a/go.mod
+++ b/go.mod
@@ -20,6 +20,7 @@ require (
 	github.com/twmb/go-cache v1.2.1
 	go.uber.org/goleak v1.3.0
 	go.uber.org/mock v0.5.0
+	golang.org/x/sync v0.9.0
 	golang.org/x/time v0.8.0
 	golang.org/x/tools v0.27.0
 	google.golang.org/grpc v1.68.0
@@ -217,7 +218,6 @@ require (
 	golang.org/x/exp/typeparams v0.0.0-20241108190413-2d47ceb2692f // indirect
 	golang.org/x/mod v0.22.0 // indirect
 	golang.org/x/net v0.31.0 // indirect
-	golang.org/x/sync v0.9.0 // indirect
 	golang.org/x/sys v0.27.0 // indirect
 	golang.org/x/text v0.20.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240930140551-af27646dc61f // indirect