Exit non-zero when listing includes import failures.

1 files changed, 1 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index 1649b16..9917977 100755
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@ else:
     extra = {
         'install_requires': [
             'extras',
-            'testtools>=0.9.30',
+            'testtools>=0.9.34',
         ]
     }