diff --git a/util/mock/mocks/statement.go b/util/mock/mocks/statement.go
index <HASH>..<HASH> 100644
--- a/util/mock/mocks/statement.go
+++ b/util/mock/mocks/statement.go
@@ -11,6 +11,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Package mocks is just for test only.
 package mocks
 
 import (
util/mock/mocks: add package comment.