2 files changed, 4 insertions, 2 deletions
diff --git a/tests/storage/test_base.py b/tests/storage/test_base.py
index a0a24ce096..55fbffa7a2 100644
--- a/tests/storage/test_base.py
+++ b/tests/storage/test_base.py
@@ -38,8 +38,9 @@ class SQLBaseStoreTestCase(unittest.TestCase):
             return defer.succeed(func(self.mock_txn, *args, **kwargs))
         self.db_pool.runInteraction = runInteraction
 
-        hs = HomeServer("test",
-                db_pool=self.db_pool)
+        config = Mock()
+        config.event_cache_size = 1
+        hs = HomeServer("test", db_pool=self.db_pool, config=config)
 
         self.datastore = SQLBaseStore(hs)
 
diff --git a/tests/utils.py b/tests/utils.py
index 25c33492a5..39895c739f 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -41,6 +41,7 @@ def setup_test_homeserver(name="test", datastore=None, config=None, **kargs):
     if config is None:
         config = Mock()
         config.signing_key = [MockKey()]
+        config.event_cache_size = 1
 
     if datastore is None:
         db_pool = SQLiteMemoryDbPool()