diff --git a/core/src/server/Config.cpp b/core/src/server/Config.cpp
index f1a3a421f7..0395d673a4 100644
--- a/core/src/server/Config.cpp
+++ b/core/src/server/Config.cpp
@@ -667,7 +667,7 @@ Config::CheckConfigVersion(const std::string& value) {
             std::string msg = "Invalid config version: " + value +
                               ". Expected config version: " + milvus_config_version_map.at(MILVUS_VERSION);
             SERVER_LOG_ERROR << msg;
-            // return Status(SERVER_INVALID_ARGUMENT, msg);
+            return Status(SERVER_INVALID_ARGUMENT, msg);
         }
     }
     return Status::OK();
diff --git a/core/unittest/server/test_config.cpp b/core/unittest/server/test_config.cpp
index c68dce1f0e..d6974b1729 100644
--- a/core/unittest/server/test_config.cpp
+++ b/core/unittest/server/test_config.cpp
@@ -685,10 +685,10 @@ TEST_F(ConfigTest, SERVER_CONFIG_VALID_FAIL_TEST) {
     milvus::Status s = config.LoadConfigFile(config_path + VALID_CONFIG_FILE);
     ASSERT_TRUE(s.ok());
 
-    // fiu_enable("check_config_version_fail", 1, NULL, 0);
-    // s = config.ValidateConfig();
-    // ASSERT_FALSE(s.ok());
-    // fiu_disable("check_config_version_fail");
+    fiu_enable("check_config_version_fail", 1, NULL, 0);
+    s = config.ValidateConfig();
+    ASSERT_FALSE(s.ok());
+    fiu_disable("check_config_version_fail");
 
     /* server config */
     fiu_enable("check_config_address_fail", 1, NULL, 0);