diff --git a/Lib/doctest.py b/Lib/doctest.py
index 8134170ffc8..9accb81bfc6 100644
--- a/Lib/doctest.py
+++ b/Lib/doctest.py
@@ -1328,7 +1328,8 @@ class DocTestRunner:
         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/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py
index 49474f6351c..0615905ee9c 100644
--- a/Lib/test/test_httpservers.py
+++ b/Lib/test/test_httpservers.py
@@ -292,14 +292,22 @@ class CGIHTTPServerTestCase(BaseTestCase):
         self.cgi_dir = os.path.join(self.parent_dir, 'cgi-bin')
         os.mkdir(self.cgi_dir)
 
+        # The shebang line should be pure ASCII: use symlink if possible.
+        # See issue #7668.
+        if hasattr(os, 'symlink'):
+            self.pythonexe = os.path.join(self.parent_dir, 'python')
+            os.symlink(sys.executable, self.pythonexe)
+        else:
+            self.pythonexe = sys.executable
+
         self.file1_path = os.path.join(self.cgi_dir, 'file1.py')
         with open(self.file1_path, 'w') as file1:
-            file1.write(cgi_file1 % sys.executable)
+            file1.write(cgi_file1 % self.pythonexe)
         os.chmod(self.file1_path, 0777)
 
         self.file2_path = os.path.join(self.cgi_dir, 'file2.py')
         with open(self.file2_path, 'w') as file2:
-            file2.write(cgi_file2 % sys.executable)
+            file2.write(cgi_file2 % self.pythonexe)
         os.chmod(self.file2_path, 0777)
 
         self.cwd = os.getcwd()
@@ -308,6 +316,8 @@ class CGIHTTPServerTestCase(BaseTestCase):
     def tearDown(self):
         try:
             os.chdir(self.cwd)
+            if self.pythonexe != sys.executable:
+                os.remove(self.pythonexe)
             os.remove(self.file1_path)
             os.remove(self.file2_path)
             os.rmdir(self.cgi_dir)
diff --git a/Misc/NEWS b/Misc/NEWS
index 38c5f366801..edb0a4b178a 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -62,6 +62,11 @@ Build
   variable anymore.  It also forwards the LDFLAGS settings to the linker
   when building a shared library.
 
+Tests
+-----
+
+- Issue #7667: Fix doctest failures with non-ASCII paths.
+
 
 What's New in Python 2.6.5?
 ===========================