@@ -14,6 +14,7 @@
 
 from google.api_core import exceptions
 from google.api_core import retry
+from google.auth import exceptions as auth_exceptions
 import requests.exceptions
 
 
@@ -27,6 +28,7 @@
 exceptions.InternalServerError,
 exceptions.BadGateway,
 requests.exceptions.ConnectionError,
+auth_exceptions.TransportError,
 )
 
 

@@ -51,6 +51,12 @@ def test_w_unstructured_requests_connectionerror(self):
 exc = requests.exceptions.ConnectionError()
 self.assertTrue(self._call_fut(exc))
 
+def test_w_auth_transporterror(self):
+from google.auth.exceptions import TransportError
+
+exc = TransportError("testing")
+self.assertTrue(self._call_fut(exc))
+
 def test_w_unstructured_too_many_requests(self):
 from google.api_core.exceptions import TooManyRequests