diff --git a/test/test_version.py b/test/test_version.py
index ac5a1a5..40b3da1 100644
--- a/test/test_version.py
+++ b/test/test_version.py
@@ -76,13 +76,13 @@ def test_bump_random(monkeypatch):
 def test_bump_tag_num():
     raw_pattern = "MAJOR.MINOR.PATCH[PYTAGNUM]"
     cur_version = "0.1.1b0"
-    assert v2version.incr(cur_version, raw_pattern, tag_num=True ) == "0.1.1b1"
+    assert v2version.incr(cur_version, raw_pattern, tag_num=True) == "0.1.1b1"
 
 
 def test_bump_tag_num_without_tag():
     raw_pattern = "MAJOR.MINOR.PATCH[PYTAGNUM]"
     cur_version = "0.1.1"
-    assert v2version.incr(cur_version, raw_pattern, tag_num=True ) == None
+    assert v2version.incr(cur_version, raw_pattern, tag_num=True) is None
 
 
 def test_parse_version_info():