diff --git a/nacos/v2/nacos_test.go b/nacos/v2/nacos_test.go
index d7d4e57..06eb373 100644
--- a/nacos/v2/nacos_test.go
+++ b/nacos/v2/nacos_test.go
@@ -181,7 +181,7 @@ func TestMultipleInstances(t *testing.T) {
 		Clusters:    []string{clusterName},
 		HealthyOnly: true,
 	})
-	assert.Equal(t, "instance list is empty", err.Error())
+	assert.Equal(t, "instance list is empty!", err.Error())
 	assert.Equal(t, 0, len(res))
 }