diff -r 2863470caebb Lib/doctest.py
--- a/Lib/doctest.py	Sun Dec 18 02:56:18 2011 +0100
+++ b/Lib/doctest.py	Sun Dec 18 16:04:48 2011 +0100
@@ -2252,6 +2252,16 @@
     def id(self):
         return self._dt_test.name
 
+    def __eq__(self, other):
+        if type(self) is not type(other):
+            return NotImplemented
+
+        return hash(self) == hash(other)
+
+    def __hash__(self):
+        return hash((type(self), self._dt_test, self._dt_optionflags,
+                     self._dt_setUp, self._dt_tearDown, self._dt_checker))
+
     def __repr__(self):
         name = self._dt_test.name.split('.')
         return "%s (%s)" % (name[-1], '.'.join(name[:-1]))
diff -r 2863470caebb Lib/test/test_doctest.py
--- a/Lib/test/test_doctest.py	Sun Dec 18 02:56:18 2011 +0100
+++ b/Lib/test/test_doctest.py	Sun Dec 18 16:04:48 2011 +0100
@@ -347,6 +347,19 @@
     Traceback (most recent call last):
     ValueError: line 2 of the docstring for some_test lacks blank after ...: '...print 1'
 
+Compare `DocTest`:
+
+    >>> test == test
+    True
+    >>> docstring = '''
+    ...     >>> print 42
+    ...     42
+    ... '''
+    >>> test2 = parser.get_doctest(docstring, globs, 'other_test',
+    ...                            'other_file', 10)
+    >>> test == test2
+    False
+
 """
 
 def test_DocTestFinder(): r"""