diff --git a/tests/common/test_view_utils.py b/tests/common/test_view_utils.py
index afd62be5..dc4e5e29 100644
--- a/tests/common/test_view_utils.py
+++ b/tests/common/test_view_utils.py
@@ -8,7 +8,7 @@ class GetHumanSizeStrTest(TestCase):
 
     def setUp(self):
         try:
-            locale.setlocale(locale.LC_NUMERIC, None)
+            locale.setlocale(locale.LC_NUMERIC, "C")
         except:
             print("Error: could not set locale.LC_NUMERIC to None")