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-rw-r--r--tests/storage/test_id_generators.py14
-rw-r--r--tests/storage/test_redaction.py10
2 files changed, 16 insertions, 8 deletions
diff --git a/tests/storage/test_id_generators.py b/tests/storage/test_id_generators.py
index aad6bc907e..6c389fe9ac 100644
--- a/tests/storage/test_id_generators.py
+++ b/tests/storage/test_id_generators.py
@@ -12,6 +12,8 @@
 # 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 List, Optional
+
 from synapse.storage.database import DatabasePool
 from synapse.storage.engines import IncorrectDatabaseSetup
 from synapse.storage.util.id_generators import MultiWriterIdGenerator
@@ -43,7 +45,7 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase):
         )
 
     def _create_id_generator(
-        self, instance_name="master", writers=["master"]
+        self, instance_name="master", writers: Optional[List[str]] = None
     ) -> MultiWriterIdGenerator:
         def _create(conn):
             return MultiWriterIdGenerator(
@@ -53,7 +55,7 @@ class MultiWriterIdGeneratorTestCase(HomeserverTestCase):
                 instance_name=instance_name,
                 tables=[("foobar", "instance_name", "stream_id")],
                 sequence_name="foobar_seq",
-                writers=writers,
+                writers=writers or ["master"],
             )
 
         return self.get_success_or_raise(self.db_pool.runWithConnection(_create))
@@ -476,7 +478,7 @@ class BackwardsMultiWriterIdGeneratorTestCase(HomeserverTestCase):
         )
 
     def _create_id_generator(
-        self, instance_name="master", writers=["master"]
+        self, instance_name="master", writers: Optional[List[str]] = None
     ) -> MultiWriterIdGenerator:
         def _create(conn):
             return MultiWriterIdGenerator(
@@ -486,7 +488,7 @@ class BackwardsMultiWriterIdGeneratorTestCase(HomeserverTestCase):
                 instance_name=instance_name,
                 tables=[("foobar", "instance_name", "stream_id")],
                 sequence_name="foobar_seq",
-                writers=writers,
+                writers=writers or ["master"],
                 positive=False,
             )
 
@@ -612,7 +614,7 @@ class MultiTableMultiWriterIdGeneratorTestCase(HomeserverTestCase):
         )
 
     def _create_id_generator(
-        self, instance_name="master", writers=["master"]
+        self, instance_name="master", writers: Optional[List[str]] = None
     ) -> MultiWriterIdGenerator:
         def _create(conn):
             return MultiWriterIdGenerator(
@@ -625,7 +627,7 @@ class MultiTableMultiWriterIdGeneratorTestCase(HomeserverTestCase):
                     ("foobar2", "instance_name", "stream_id"),
                 ],
                 sequence_name="foobar_seq",
-                writers=writers,
+                writers=writers or ["master"],
             )
 
         return self.get_success_or_raise(self.db_pool.runWithConnection(_create))
diff --git a/tests/storage/test_redaction.py b/tests/storage/test_redaction.py
index 2622207639..2d2f58903c 100644
--- a/tests/storage/test_redaction.py
+++ b/tests/storage/test_redaction.py
@@ -12,6 +12,7 @@
 # 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 typing import Optional
 
 from canonicaljson import json
 
@@ -47,10 +48,15 @@ class RedactionTestCase(unittest.HomeserverTestCase):
         self.depth = 1
 
     def inject_room_member(
-        self, room, user, membership, replaces_state=None, extra_content={}
+        self,
+        room,
+        user,
+        membership,
+        replaces_state=None,
+        extra_content: Optional[dict] = None,
     ):
         content = {"membership": membership}
-        content.update(extra_content)
+        content.update(extra_content or {})
         builder = self.event_builder_factory.for_room_version(
             RoomVersions.V1,
             {