Index: Lib/doctest.py
===================================================================
--- Lib/doctest.py	(revision 62386)
+++ Lib/doctest.py	(working copy)
@@ -2089,6 +2089,7 @@
         self._dt_optionflags = optionflags
         self._dt_checker = checker
         self._dt_test = test
+        self._dt_globs = test.globs.copy()
         self._dt_setUp = setUp
         self._dt_tearDown = tearDown
 
@@ -2104,7 +2105,9 @@
         if self._dt_tearDown is not None:
             self._dt_tearDown(test)
 
+        # restore the original globs
         test.globs.clear()
+        test.globs.update(self._dt_globs)
 
     def runTest(self):
         test = self._dt_test
Index: Lib/test/test_doctest.py
===================================================================
--- Lib/test/test_doctest.py	(revision 62386)
+++ Lib/test/test_doctest.py	(working copy)
@@ -1880,7 +1880,7 @@
        Here, we didn't need to use a tearDown function because we
        modified the test globals, which are a copy of the
        sample_doctest module dictionary.  The test globals are
-       automatically cleared for us after a test.
+       automatically reset for us after a test.
        """
 
 def test_DocFileSuite():
@@ -2026,7 +2026,7 @@
 
        Here, we didn't need to use a tearDown function because we
        modified the test globals.  The test globals are
-       automatically cleared for us after a test.
+       automatically reset for us after a test.
 
        Tests in a file run using `DocFileSuite` can also access the
        `__file__` global, which is set to the name of the file