diff --git a/ironic/tests/base.py b/ironic/tests/base.py
index eccdb9a1bf..e19a2380ce 100644
--- a/ironic/tests/base.py
+++ b/ironic/tests/base.py
@@ -55,7 +55,7 @@ logging.setup(CONF, 'ironic')
 
 
 # NOTE(rpittau) this function allows autospec for classmethods and
-# staticmethods in Python 3.6, while no issue occurs in Python 3.7
+# staticmethods in Python 3.6, while no issue occurs in Python 3.7.4
 # and later.
 # For more info please see: http://bugs.python.org/issue23078
 def _patch_mock_callable(obj):
@@ -133,7 +133,7 @@ class TestCase(oslo_test_base.BaseTestCase):
             # subprocess.Popen is a class
             self.patch(subprocess, 'Popen', DoNotCallPopen)
 
-        if sys.version_info < (3, 7):
+        if sys.version_info < (3, 7, 4):
             _patch_mock_callable._old_func = mock._callable
             mock._callable = _patch_mock_callable