4 files changed, 2 insertions, 2 deletions
diff --git a/tests/util/__init__.py b/tests/util/__init__.py
index d0e9399dda..bfebb0f644 100644
--- a/tests/util/__init__.py
+++ b/tests/util/__init__.py
@@ -12,4 +12,3 @@
 # 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.
-
diff --git a/tests/util/test_dict_cache.py b/tests/util/test_dict_cache.py
index 7bbe795622..272b71034a 100644
--- a/tests/util/test_dict_cache.py
+++ b/tests/util/test_dict_cache.py
@@ -14,7 +14,6 @@
 # limitations under the License.
 
 
-from twisted.internet import defer
 from tests import unittest
 
 from synapse.util.caches.dictionary_cache import DictionaryCache
diff --git a/tests/util/test_snapshot_cache.py b/tests/util/test_snapshot_cache.py
index 4ee0d49673..7e289715ba 100644
--- a/tests/util/test_snapshot_cache.py
+++ b/tests/util/test_snapshot_cache.py
@@ -19,6 +19,7 @@ from .. import unittest
 from synapse.util.caches.snapshot_cache import SnapshotCache
 from twisted.internet.defer import Deferred
 
+
 class SnapshotCacheTestCase(unittest.TestCase):
 
     def setUp(self):
diff --git a/tests/util/test_treecache.py b/tests/util/test_treecache.py
index 1efbeb6b33..bcc64422b2 100644
--- a/tests/util/test_treecache.py
+++ b/tests/util/test_treecache.py
@@ -18,6 +18,7 @@ from .. import unittest
 
 from synapse.util.caches.treecache import TreeCache
 
+
 class TreeCacheTestCase(unittest.TestCase):
     def test_get_set_onelevel(self):
         cache = TreeCache()