diff --git a/requests/utils.py b/requests/utils.py
index 08e22983..a2d434ef 100644
--- a/requests/utils.py
+++ b/requests/utils.py
@@ -588,4 +588,4 @@ def get_auth_from_url(url):
         parsed = urlparse(url)
         return (parsed.username, parsed.password)
     else:
-        return None
+        return ('', '')