diff --git a/tests/replication/storage/_base.py b/tests/replication/storage/_base.py
new file mode 100644
index 0000000000..de26a62ae1
--- /dev/null
+++ b/tests/replication/storage/_base.py
@@ -0,0 +1,72 @@
+# Copyright 2016 OpenMarket Ltd
+# Copyright 2018 New Vector Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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 typing import Any, Iterable, Optional
+from unittest.mock import Mock
+
+from twisted.test.proto_helpers import MemoryReactor
+
+from synapse.server import HomeServer
+from synapse.util import Clock
+
+from tests.replication._base import BaseStreamTestCase
+
+
+class BaseWorkerStoreTestCase(BaseStreamTestCase):
+ def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
+ return self.setup_test_homeserver(federation_client=Mock())
+
+ def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
+ super().prepare(reactor, clock, hs)
+
+ self.reconnect()
+
+ self.master_store = hs.get_datastores().main
+ self.worker_store = self.worker_hs.get_datastores().main
+ persistence = hs.get_storage_controllers().persistence
+ assert persistence is not None
+ self.persistance = persistence
+
+ def replicate(self) -> None:
+ """Tell the master side of replication that something has happened, and then
+ wait for the replication to occur.
+ """
+ self.streamer.on_notifier_poke()
+ self.pump(0.1)
+
+ def check(
+ self, method: str, args: Iterable[Any], expected_result: Optional[Any] = None
+ ) -> None:
+ master_result = self.get_success(getattr(self.master_store, method)(*args))
+ worker_result = self.get_success(getattr(self.worker_store, method)(*args))
+ if expected_result is not None:
+ self.assertEqual(
+ master_result,
+ expected_result,
+ "Expected master result to be %r but was %r"
+ % (expected_result, master_result),
+ )
+ self.assertEqual(
+ worker_result,
+ expected_result,
+ "Expected worker result to be %r but was %r"
+ % (expected_result, worker_result),
+ )
+ self.assertEqual(
+ master_result,
+ worker_result,
+ "Worker result %r does not match master result %r"
+ % (worker_result, master_result),
+ )
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