diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
index 944a97d..6676f16 100644
--- a/Lib/test/test_argparse.py
+++ b/Lib/test/test_argparse.py
@@ -73,6 +73,8 @@
         kwarg_str = ', '.join(['%s=%r' % tup for tup in sorted_items])
         return '%s(%s)' % (type(self).__name__, kwarg_str)
 
+    __hash__ = None
+
     def __eq__(self, other):
         return vars(self) == vars(other)
 
@@ -1383,6 +1385,8 @@
     def __init__(self, name):
         self.name = name
 
+    __hash__ = None
+
     def __eq__(self, other):
         if other in self.seen:
             text = self.seen[other]
@@ -1446,6 +1450,8 @@
     def __init__(self, name):
         self.name = name
 
+    __hash__ = None
+
     def __eq__(self, other):
         if other not in self.seen:
             text = 'Check that file is writable.'
@@ -1511,6 +1517,8 @@
         def __init__(self, value):
             self.value = value
 
+        __hash__ = None
+
         def __eq__(self, other):
             return (type(self), self.value) == (type(other), other.value)
 
@@ -1533,6 +1541,8 @@
         def __init__(self, value):
             self.value = value
 
+        __hash__ = None
+
         def __eq__(self, other):
             return (type(self), self.value) == (type(other), other.value)