diff --git a/pkg/constants/dfget_super_code_test.go b/pkg/constants/dfget_super_code_test.go
new file mode 100644
index 000000000..1ca825c07
--- /dev/null
+++ b/pkg/constants/dfget_super_code_test.go
@@ -0,0 +1,38 @@
+/*
+ * Copyright The Dragonfly Authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package constants
+
+import (
+	"testing"
+
+	"github.com/go-check/check"
+)
+
+func Test(t *testing.T) {
+	check.TestingT(t)
+}
+
+type DfgetSuperCodeUtilSuite struct{}
+
+func init() {
+	check.Suite(&DfgetSuperCodeUtilSuite{})
+}
+
+func (suite *DfgetSuperCodeUtilSuite) TestGetMsgByCode(c *check.C) {
+	msg := GetMsgByCode(200)
+	c.Check(msg, check.Equals, "success")
+}