diff --git a/tests/storage/test_registration.py b/tests/storage/test_registration.py
index 2cb1e210c171..07d0ed4132b9 100644
--- a/tests/storage/test_registration.py
+++ b/tests/storage/test_registration.py
@@ -11,7 +11,7 @@
 # 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 twisted.internet.testing import MemoryReactor
+from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.api.constants import UserTypes
 from synapse.api.errors import ThreepidValidationError