diff --git a/pkg/controller/openapi/controller_test.go b/pkg/controller/openapi/controller_test.go
index 468d4cfb8..e3204c766 100644
--- a/pkg/controller/openapi/controller_test.go
+++ b/pkg/controller/openapi/controller_test.go
@@ -332,6 +332,7 @@ func setup(t *testing.T) (*testEnv, context.Context) {
 	ctx, cancel := context.WithCancel(context.Background())
 
 	factory.Start(ctx.Done())
+	factory.WaitForCacheSync(ctx.Done())
 
 	env.mux = http.NewServeMux()
 	h := handler.NewOpenAPIService(&spec.Swagger{})