diff --git a/tests/events/test_presence_router.py b/tests/events/test_presence_router.py
index 6fb1f1bd6e..0fcfe38efa 100644
--- a/tests/events/test_presence_router.py
+++ b/tests/events/test_presence_router.py
@@ -12,7 +12,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Dict, Iterable, List, Optional, Set, Tuple, Union
-from unittest.mock import Mock
+from unittest.mock import AsyncMock, Mock
import attr
@@ -30,7 +30,6 @@ from synapse.types import JsonDict, StreamToken, create_requester
from synapse.util import Clock
from tests.handlers.test_sync import generate_sync_config
-from tests.test_utils import simple_async_mock
from tests.unittest import (
FederatingHomeserverTestCase,
HomeserverTestCase,
@@ -157,7 +156,7 @@ class PresenceRouterTestCase(FederatingHomeserverTestCase):
def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
# Mock out the calls over federation.
self.fed_transport_client = Mock(spec=["send_transaction"])
- self.fed_transport_client.send_transaction = simple_async_mock({})
+ self.fed_transport_client.send_transaction = AsyncMock(return_value={})
hs = self.setup_test_homeserver(
federation_transport_client=self.fed_transport_client,
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