diff --git a/tests/cli/test_discover.py b/tests/cli/test_discover.py
index fab6374..0770bca 100644
--- a/tests/cli/test_discover.py
+++ b/tests/cli/test_discover.py
@@ -1,11 +1,11 @@
-from vdirsyncer.storage.base import Storage
-from vdirsyncer import exceptions
-
-from hypothesis import given
-import hypothesis.strategies as st
-
 from textwrap import dedent
 
+import hypothesis.strategies as st
+from hypothesis import given
+
+from vdirsyncer import exceptions
+from vdirsyncer.storage.base import Storage
+
 
 def test_discover_command(tmpdir, runner):
     runner.write_with_general(dedent('''
@@ -181,6 +181,7 @@ def test_collection_required(a_requires, b_requires, tmpdir, runner,
 
     class TestStorage(Storage):
         storage_name = 'test'
+
         def __init__(self, require_collection, **kw):
             if require_collection:
                 assert not kw.get('collection')