diff --git a/pkg/middlewares/observability/semconv_test.go b/pkg/middlewares/observability/semconv_test.go
index 960d4b98a..1494e3aeb 100644
--- a/pkg/middlewares/observability/semconv_test.go
+++ b/pkg/middlewares/observability/semconv_test.go
@@ -52,8 +52,6 @@ func TestSemConvServerMetrics(t *testing.T) {
 
 	for _, test := range tests {
 		t.Run(test.desc, func(t *testing.T) {
-			t.Parallel()
-
 			var cfg otypes.OTLP
 			(&cfg).SetDefaults()
 			cfg.AddRoutersLabels = true
diff --git a/pkg/proxy/httputil/observability_test.go b/pkg/proxy/httputil/observability_test.go
index c0ef0e7a3..117b589bb 100644
--- a/pkg/proxy/httputil/observability_test.go
+++ b/pkg/proxy/httputil/observability_test.go
@@ -57,8 +57,6 @@ func TestObservabilityRoundTripper_metrics(t *testing.T) {
 
 	for _, test := range tests {
 		t.Run(test.desc, func(t *testing.T) {
-			t.Parallel()
-
 			var cfg otypes.OTLP
 			(&cfg).SetDefaults()
 			cfg.AddRoutersLabels = true