diff --git a/python2/typing.py b/python2/typing.py
index 9d24306e..35be9911 100644
--- a/python2/typing.py
+++ b/python2/typing.py
@@ -1268,13 +1268,13 @@ def __getitem__(self, parameters):
         return super(TupleMeta, self).__getitem__(parameters)
 
     def __instancecheck__(self, obj):
-        if self.__args__ == None:
+        if self.__args__ is None:
             return isinstance(obj, tuple)
         raise TypeError("Parameterized Tuple cannot be used "
                         "with isinstance().")
 
     def __subclasscheck__(self, cls):
-        if self.__args__ == None:
+        if self.__args__ is None:
             return issubclass(cls, tuple)
         raise TypeError("Parameterized Tuple cannot be used "
                         "with issubclass().")
diff --git a/src/typing.py b/src/typing.py
index bca3a2de..f389bfb2 100644
--- a/src/typing.py
+++ b/src/typing.py
@@ -1193,13 +1193,13 @@ def __getitem__(self, parameters):
         return super().__getitem__(parameters)
 
     def __instancecheck__(self, obj):
-        if self.__args__ == None:
+        if self.__args__ is None:
             return isinstance(obj, tuple)
         raise TypeError("Parameterized Tuple cannot be used "
                         "with isinstance().")
 
     def __subclasscheck__(self, cls):
-        if self.__args__ == None:
+        if self.__args__ is None:
             return issubclass(cls, tuple)
         raise TypeError("Parameterized Tuple cannot be used "
                         "with issubclass().")
diff --git a/tox.ini b/tox.ini
index 42698b3e..056a5b1c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,6 @@ ignore =
   E128,
   E129,
   E501,
-  E711,
   W503,
   # irrelevant plugins
   B3,