diff --git a/functional_consumer_staticmembership_test.go b/functional_consumer_staticmembership_test.go
index 8f2f4e3cb..946169b10 100644
--- a/functional_consumer_staticmembership_test.go
+++ b/functional_consumer_staticmembership_test.go
@@ -211,7 +211,7 @@ func TestFuncConsumerGroupStaticMembership_Fenced(t *testing.T) {
 	if len(m2.errs) < 1 {
 		t.Errorf("expect m2 to be fenced by group instanced id, but got no err")
 	}
-	if errors.Is(m2.errs[0], ErrFencedInstancedId) {
+	if !errors.Is(m2.errs[0], ErrFencedInstancedId) {
 		t.Errorf("expect m2 to be fenced by group instanced id, but got wrong err %v", m2.errs[0])
 	}