1 files changed, 1 insertions, 1 deletions
diff --git a/tests/replication/test_federation_ack.py b/tests/replication/test_federation_ack.py
index 0d9e3bb11d..44ad5eec57 100644
--- a/tests/replication/test_federation_ack.py
+++ b/tests/replication/test_federation_ack.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import mock
+from unittest import mock
 
 from synapse.app.generic_worker import GenericWorkerServer
 from synapse.replication.tcp.commands import FederationAckCommand