diff --git a/tests/test_cliutil.py b/tests/test_cliutil.py
index b4013b6777c1d5c3a8ade47e1c5dc10aed736c19..510d6152c6d8d2f9ca7723a379d580c018774a9f 100644
--- a/tests/test_cliutil.py
+++ b/tests/test_cliutil.py
@@ -32,6 +32,8 @@ class ArgChoices(enum.Enum):
     AA = 'aa'
     AB = 'ab'
     BB = 'bb'
+    START = AA
+    END = BB
 
 
 class MockTraceback:
@@ -270,9 +272,9 @@ def test_diff_year(date, diff, expected):
 def test_can_run(cmd, expected):
     assert cliutil.can_run(cmd) == expected
 
-@pytest.mark.parametrize('choice', ArgChoices)
-def test_enum_arg_enum_type(arg_enum, choice):
-    assert arg_enum.enum_type(choice.name) is choice
+@pytest.mark.parametrize('name,choice', ArgChoices.__members__.items())
+def test_enum_arg_enum_type(arg_enum, name, choice):
+    assert arg_enum.enum_type(name.lower()) is choice
     assert arg_enum.enum_type(choice.value) is choice
 
 @pytest.mark.parametrize('arg', 'az\0')
@@ -280,9 +282,9 @@ def test_enum_arg_no_enum_match(arg_enum, arg):
     with pytest.raises(ValueError):
         arg_enum.enum_type(arg)
 
-@pytest.mark.parametrize('choice', ArgChoices)
-def test_enum_arg_value_type(arg_enum, choice):
-    assert arg_enum.value_type(choice.name) == choice.value
+@pytest.mark.parametrize('name,choice', ArgChoices.__members__.items())
+def test_enum_arg_value_type(arg_enum, name, choice):
+    assert arg_enum.value_type(name.lower()) == choice.value
     assert arg_enum.value_type(choice.value) == choice.value
 
 @pytest.mark.parametrize('arg', 'az\0')