diff --git a/pip/_vendor/requests/certs.py b/pip/_vendor/requests/certs.py

index f922b99..2c9d347 100644

--- a/pip/_vendor/requests/certs.py

+++ b/pip/_vendor/requests/certs.py

@@ -14,12 +14,13 @@ packaged CA bundle.

 import os.path

 try:

+    raise ImportError # force fallback

     from certifi import where

 except ImportError:

     def where():

         """Return the preferred certificate bundle."""

-        # vendored bundle inside Requests

-        return os.path.join(os.path.dirname(__file__), 'cacert.pem')

+        # system CA certs

+        return '/etc/pki/tls/certs/ca-bundle.crt'

 if __name__ == '__main__':

     print(where())