1 files changed, 1 insertions, 1 deletions
diff --git a/tests/rest/client/test_retention.py b/tests/rest/client/test_retention.py
index b8285f3240..be1211dbce 100644
--- a/tests/rest/client/test_retention.py
+++ b/tests/rest/client/test_retention.py
@@ -12,7 +12,7 @@
 # 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.
-from mock import Mock
+from unittest.mock import Mock
 
 from synapse.api.constants import EventTypes
 from synapse.rest import admin