Index: requests-0.14.1/requests/certs.py
===================================================================
--- requests-0.14.1.orig/requests/certs.py
+++ requests-0.14.1/requests/certs.py
@@ -21,7 +21,10 @@ def where():
         return certifi.where()
     else:
         f = os.path.split(__file__)[0]
-        return os.path.join(f, 'cacert.pem')
+        path = os.path.join(f, 'cacert.pem')
+        if os.path.exists(path):
+            return path
+    return None
 
 if __name__ == '__main__':
     print(where())