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 19:01:56 2011 +0100
@@ -451,6 +451,21 @@
         self.options = options
         self.exc_msg = exc_msg
 
+    def __eq__(self, other):
+        if type(self) is not type(other):
+            return NotImplemented
+
+        return self.source == other.source and \
+               self.want == other.want and \
+               self.lineno == other.lineno and \
+               self.indent == other.indent and \
+               self.options == other.options and \
+               self.exc_msg == other.exc_msg
+
+    def __ne__(self, other):
+        return not self == other
+
+
 class DocTest:
     """
     A collection of doctest examples that should be run in a single
@@ -499,6 +514,19 @@
         return ('<DocTest %s from %s:%s (%s)>' %
                 (self.name, self.filename, self.lineno, examples))
 
+    def __eq__(self, other):
+        if type(self) is not type(other):
+            return NotImplemented
+
+        return self.examples == other.examples and \
+               self.docstring == other.docstring and \
+               self.globs == other.globs and \
+               self.name == other.name and \
+               self.filename == other.filename and \
+               self.lineno == other.lineno
+
+    def __ne__(self, other):
+        return not self == other
 
     # This lets us sort tests by name:
     def __cmp__(self, other):
@@ -2252,6 +2280,19 @@
     def id(self):
         return self._dt_test.name
 
+    def __eq__(self, other):
+        if type(self) is not type(other):
+            return NotImplemented
+
+        return self._dt_test == other._dt_test and \
+               self._dt_optionflags == other._dt_optionflags and \
+               self._dt_setUp == other._dt_setUp and \
+               self._dt_tearDown == other._dt_tearDown and \
+               self._dt_checker == other._dt_checker
+
+    def __ne__(self, other):
+        return not self == other
+
     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 19:01:56 2011 +0100
@@ -347,6 +347,46 @@
     Traceback (most recent call last):
     ValueError: line 2 of the docstring for some_test lacks blank after ...: '...print 1'
 
+Compare `DocTest`:
+
+    >>> docstring = '''
+    ...     >>> print 12
+    ...     12
+    ... '''
+    >>> test = parser.get_doctest(docstring, globs, 'some_test',
+    ...                           'some_test', 20)
+    >>> same_test = parser.get_doctest(docstring, globs, 'some_test',
+    ...                                'some_test', 20)
+    >>> test == same_test
+    True
+    >>> test != same_test
+    False
+    >>> docstring = '''
+    ...     >>> print 42
+    ...     42
+    ... '''
+    >>> other_test = parser.get_doctest(docstring, globs, 'other_test',
+    ...                                 'other_file', 10)
+    >>> test == other_test
+    False
+    >>> test != other_test
+    True
+
+Compare `DocTestCase`:
+
+    >>> DocTestCase = doctest.DocTestCase
+    >>> test_case = DocTestCase(test)
+    >>> same_test_case = DocTestCase(same_test)
+    >>> other_test_case = DocTestCase(other_test)
+    >>> test_case == same_test_case
+    True
+    >>> test_case != same_test_case
+    False
+    >>> test == other_test_case
+    False
+    >>> test != other_test_case
+    True
+
 """
 
 def test_DocTestFinder(): r"""