diff --git a/Lib/doctest.py b/Lib/doctest.py
index dd579fd..c37ff9e 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -1333,7 +1333,9 @@
         m = self.__LINECACHE_FILENAME_RE.match(filename)
         if m and m.group('name') == self.test.name:
             example = self.test.examples[int(m.group('examplenum'))]
-            source = example.source.encode('ascii', 'backslashreplace')
+            source = example.source
+            if isinstance(source, unicode):
+                source = source.encode('ascii', 'backslashreplace')
             return source.splitlines(True)
         else:
             return self.save_linecache_getlines(filename, module_globals)
diff --git a/Lib/test/test_doctest.py b/Lib/test/test_doctest.py
index 84c0798..c027acd 100644
--- a/Lib/test/test_doctest.py
+++ b/Lib/test/test_doctest.py
@@ -1721,6 +1721,9 @@
 
       >>> doc = '''
       ... >>> x = 42
+      ... >>> raise Exception('clé')
+      ... Traceback (most recent call last):
+      ... Exception: clé
       ... >>> import pdb; pdb.set_trace()
       ... '''
       >>> parser = doctest.DocTestParser()
@@ -1740,12 +1743,12 @@
       >>> try: runner.run(test)
       ... finally: sys.stdin = real_stdin
       --Return--
-      > <doctest foo-bär@baz[1]>(1)<module>()->None
+      > <doctest foo-bär@baz[2]>(1)<module>()->None
       -> import pdb; pdb.set_trace()
       (Pdb) print x
       42
       (Pdb) continue
-      TestResults(failed=0, attempted=2)
+      TestResults(failed=0, attempted=3)
 
       You can also put pdb.set_trace in a function called from a test: