diff --git a/analytics/tests/test_views.py b/analytics/tests/test_views.py
index bde11b2620..c0b5d8779d 100644
--- a/analytics/tests/test_views.py
+++ b/analytics/tests/test_views.py
@@ -262,7 +262,7 @@ class TestGetChartDataHelpers(ZulipTestCase):
 
     def test_sort_by_totals(self):
         # type: () -> None
-        empty = [] # type: List[int]
+        empty = []  # type: List[int]
         value_arrays = {'c': [0, 1], 'a': [9], 'b': [1, 1, 1], 'd': empty}
         self.assertEqual(sort_by_totals(value_arrays), ['a', 'b', 'c', 'd'])
 
@@ -277,7 +277,7 @@ class TestTimeRange(ZulipTestCase):
         # type: () -> None
         HOUR = timedelta(hours=1)
         DAY = timedelta(days=1)
-        TZINFO = get_fixed_timezone(-100) # 100 minutes west of UTC
+        TZINFO = get_fixed_timezone(-100)  # 100 minutes west of UTC
 
         # Using 22:59 so that converting to UTC and applying floor_to_{hour,day} do not commute
         a_time = datetime(2016, 3, 14, 22, 59).replace(tzinfo=TZINFO)