diff --git a/client/src/test/java/com/vesoft/nebula/client/meta/TestMetaClient.java b/client/src/test/java/com/vesoft/nebula/client/meta/TestMetaClient.java
index 5264d67a4..6d3a06a2e 100644
--- a/client/src/test/java/com/vesoft/nebula/client/meta/TestMetaClient.java
+++ b/client/src/test/java/com/vesoft/nebula/client/meta/TestMetaClient.java
@@ -117,7 +117,7 @@ public void testListOnlineHosts() {
             Thread.sleep(5000); // wait to update the storaged's status to OFFLINE
         } catch (Exception e) {
             LOGGER.error("stop docker service error, ", e);
-            assert(false);
+            assert (false);
         }
         if (metaClient == null) {
             metaClient = new MetaClient(address, port);
diff --git a/client/src/test/java/com/vesoft/nebula/client/util/ProcessUtil.java b/client/src/test/java/com/vesoft/nebula/client/util/ProcessUtil.java
index 691079d06..04f65e341 100644
--- a/client/src/test/java/com/vesoft/nebula/client/util/ProcessUtil.java
+++ b/client/src/test/java/com/vesoft/nebula/client/util/ProcessUtil.java
@@ -1,4 +1,4 @@
-/* Copyright (c) 2020 vesoft inc. All rights reserved.
+/* Copyright (c) 2021 vesoft inc. All rights reserved.
  *
  * This source code is licensed under Apache 2.0 License,
  * attached with Common Clause Condition 1.0, found in the LICENSES directory.