diff --git a/system_tests/retry.py b/system_tests/retry.py
index <HASH>..<HASH> 100644
--- a/system_tests/retry.py
+++ b/system_tests/retry.py
@@ -76,7 +76,7 @@ class RetryErrors(RetryBase):
 
                     delay = self.delay * self.backoff**tries
                     msg = ("%s, Trying again in %d seconds..." %
-                           (str(caught_exception), delay))
+                           (caught_exception, delay))
                     self.logger(msg)
 
                     time.sleep(delay)
Avoid double-casting execption to string.

Addresses:
<URL>