diff --git a/tests/rest/client/test_sync.py b/tests/rest/client/test_sync.py
index 7d3ee494cda2..73a485bcc46b 100644
--- a/tests/rest/client/test_sync.py
+++ b/tests/rest/client/test_sync.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import json
-from typing import List
+from typing import List, Optional
 
 from parameterized import parameterized