diff --git a/Lib/doctest.py b/Lib/doctest.py
index 726517e6ca1..a9357b599d0 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -1328,7 +1328,8 @@ def __patched_linecache_getlines(self, filename, module_globals=None):
         m = self.__LINECACHE_FILENAME_RE.match(filename)
         if m and m.group('name') == self.test.name:
             example = self.test.examples[int(m.group('examplenum'))]
-            return example.source.splitlines(True)
+            source = example.source.encode('ascii', 'backslashreplace')
+            return source.splitlines(True)
         else:
             return self.save_linecache_getlines(filename, module_globals)
 
diff --git a/Misc/NEWS b/Misc/NEWS
index f207082978b..f05e90ef1e4 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -29,6 +29,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #7667: Fix doctest failures with non-ASCII paths.
+
 - Issue #7512: shutil.copystat() could raise an OSError when the filesystem
   didn't support chflags() (for example ZFS under FreeBSD).  The error is
   now silenced.