diff --git a/tests/utils_tests/test_numberformat.py b/tests/utils_tests/test_numberformat.py
index d963bd284b..3dd1b0644f 100644
--- a/tests/utils_tests/test_numberformat.py
+++ b/tests/utils_tests/test_numberformat.py
@@ -14,38 +14,36 @@ class TestNumberFormat(TestCase):
         self.assertEqual(nformat(1234, '.'), '1234')
         self.assertEqual(nformat(1234.2, '.'), '1234.2')
         self.assertEqual(nformat(1234, '.', decimal_pos=2), '1234.00')
-        self.assertEqual(nformat(1234, '.', grouping=2, thousand_sep=','),
-                         '1234')
-        self.assertEqual(nformat(1234, '.', grouping=2, thousand_sep=',',
-                                 force_grouping=True), '12,34')
+        self.assertEqual(nformat(1234, '.', grouping=2, thousand_sep=','), '1234')
+        self.assertEqual(nformat(1234, '.', grouping=2, thousand_sep=',', force_grouping=True), '12,34')
         self.assertEqual(nformat(-1234.33, '.', decimal_pos=1), '-1234.3')
 
     def test_format_string(self):
         self.assertEqual(nformat('1234', '.'), '1234')
         self.assertEqual(nformat('1234.2', '.'), '1234.2')
         self.assertEqual(nformat('1234', '.', decimal_pos=2), '1234.00')
-        self.assertEqual(nformat('1234', '.', grouping=2, thousand_sep=','),
-                         '1234')
-        self.assertEqual(nformat('1234', '.', grouping=2, thousand_sep=',',
-                                 force_grouping=True), '12,34')
+        self.assertEqual(nformat('1234', '.', grouping=2, thousand_sep=','), '1234')
+        self.assertEqual(nformat('1234', '.', grouping=2, thousand_sep=',', force_grouping=True), '12,34')
         self.assertEqual(nformat('-1234.33', '.', decimal_pos=1), '-1234.3')
-        self.assertEqual(nformat('10000', '.', grouping=3,
-                                 thousand_sep='comma', force_grouping=True),
-                         '10comma000')
+        self.assertEqual(nformat('10000', '.', grouping=3, thousand_sep='comma', force_grouping=True), '10comma000')
 
     def test_large_number(self):
-        most_max = ('{}179769313486231570814527423731704356798070567525844996'
-                    '598917476803157260780028538760589558632766878171540458953'
-                    '514382464234321326889464182768467546703537516986049910576'
-                    '551282076245490090389328944075868508455133942304583236903'
-                    '222948165808559332123348274797826204144723168738177180919'
-                    '29988125040402618412485836{}')
-        most_max2 = ('{}35953862697246314162905484746340871359614113505168999'
-                     '31978349536063145215600570775211791172655337563430809179'
-                     '07028764928468642653778928365536935093407075033972099821'
-                     '15310256415249098018077865788815173701691026788460916647'
-                     '38064458963316171186642466965495956524082894463374763543'
-                     '61838599762500808052368249716736')
+        most_max = (
+            '{}179769313486231570814527423731704356798070567525844996'
+            '598917476803157260780028538760589558632766878171540458953'
+            '514382464234321326889464182768467546703537516986049910576'
+            '551282076245490090389328944075868508455133942304583236903'
+            '222948165808559332123348274797826204144723168738177180919'
+            '29988125040402618412485836{}'
+        )
+        most_max2 = (
+            '{}35953862697246314162905484746340871359614113505168999'
+            '31978349536063145215600570775211791172655337563430809179'
+            '07028764928468642653778928365536935093407075033972099821'
+            '15310256415249098018077865788815173701691026788460916647'
+            '38064458963316171186642466965495956524082894463374763543'
+            '61838599762500808052368249716736'
+        )
         int_max = int(float_info.max)
         self.assertEqual(nformat(int_max, '.'), most_max.format('', '8'))
         self.assertEqual(nformat(int_max + 1, '.'), most_max.format('', '9'))