diff --git a/HACKING.rst b/HACKING.rst
index 769150e6bb..466ea8649c 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -10,7 +10,6 @@ Manila Specific Commandments
 ----------------------------
 
 - [M310] Check for improper use of logging format arguments.
-- [M312] Use assertIsNone(...) instead of assertEqual(None, ...).
 - [M313] Use assertTrue(...) rather than assertEqual(True, ...).
 - [M323] Ensure that the _() function is explicitly imported to ensure proper translations.
 - [M325] str() and unicode() cannot be used on an exception. Remove or use six.text_type().
diff --git a/manila/hacking/checks.py b/manila/hacking/checks.py
index 91a25f9b4f..4530b27cad 100644
--- a/manila/hacking/checks.py
+++ b/manila/hacking/checks.py
@@ -51,7 +51,6 @@ oslo_namespace_imports = re.compile(r"from[\s]*oslo[.](.*)")
 dict_constructor_with_list_copy_re = re.compile(r".*\bdict\((\[)?(\(|\[)")
 assert_no_xrange_re = re.compile(r"\s*xrange\s*\(")
 assert_True = re.compile(r".*assertEqual\(True, .*\)")
-assert_None = re.compile(r".*assertEqual\(None, .*\)")
 no_log_warn = re.compile(r"\s*LOG.warn\(.*")
 
 
@@ -290,13 +289,6 @@ def validate_assertTrue(logical_line):
         yield(0, msg)
 
 
-def validate_assertIsNone(logical_line):
-    if re.match(assert_None, logical_line):
-        msg = ("M312: Unit tests should use assertIsNone(value) instead"
-               " of using assertEqual(None, value).")
-        yield(0, msg)
-
-
 def check_uuid4(logical_line):
     """Generating UUID
 
@@ -338,6 +330,5 @@ def factory(register):
     register(dict_constructor_with_list_copy)
     register(no_xrange)
     register(validate_assertTrue)
-    register(validate_assertIsNone)
     register(check_uuid4)
     register(no_log_warn_check)
diff --git a/manila/tests/test_hacking.py b/manila/tests/test_hacking.py
index 50dd9e4b27..6666bb5047 100644
--- a/manila/tests/test_hacking.py
+++ b/manila/tests/test_hacking.py
@@ -314,13 +314,6 @@ class HackingTestCase(test.TestCase):
         self.assertEqual(1, len(list(checks.validate_assertTrue(
             "assertEqual(True, %s)" % test_value))))
 
-    def test_validate_assertIsNone(self):
-        test_value = None
-        self.assertEqual(0, len(list(checks.validate_assertIsNone(
-            "assertIsNone(None)"))))
-        self.assertEqual(1, len(list(checks.validate_assertIsNone(
-            "assertEqual(None, %s)" % test_value))))
-
     def test_check_uuid4(self):
         code = """
             fake_uuid = uuid.uuid4()