Use mock from the stdlib. (#9772)

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/test_federation.py b/tests/test_federation.py

index fc9aab32d0..8928597d17 100644
--- a/tests/test_federation.py
+++ b/tests/test_federation.py
@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from mock import Mock
+from unittest.mock import Mock
 
 from twisted.internet.defer import succeed