diff -Naur -x '*~' opentelemetry-go-0.20.0/exporters/otlp/otlpgrpc/otlp_integration_test.go opentelemetry-go-0.20.0-fix-tests/exporters/otlp/otlpgrpc/otlp_integration_test.go
--- opentelemetry-go-0.20.0/exporters/otlp/otlpgrpc/otlp_integration_test.go	2021-04-23 20:19:07.000000000 +0200
+++ opentelemetry-go-0.20.0-fix-tests/exporters/otlp/otlpgrpc/otlp_integration_test.go	2022-12-11 21:38:56.847116699 +0100
@@ -404,7 +404,7 @@
 
 	err = exp.ExportSpans(ctx, []*sdktrace.SpanSnapshot{{Name: "misconfiguration"}})
 
-	expectedErr := fmt.Sprintf("traces exporter is disconnected from the server %s: grpc: no transport security set (use grpc.WithInsecure() explicitly or set credentials)", mc.endpoint)
+	expectedErr := fmt.Sprintf("traces exporter is disconnected from the server %s: grpc: no transport security set (use grpc.WithTransportCredentials(insecure.NewCredentials()) explicitly or set credentials)", mc.endpoint)
 
 	require.Equal(t, expectedErr, err.Error())