diff --git a/setup.py b/setup.py
index d3e9c72..d011923 100755
--- a/setup.py
+++ b/setup.py
@@ -35,6 +35,6 @@ setup(name="ognibuild",
       extras_require={
           'debian': ['debmutate', 'python_debian', 'python_apt'],
       },
-      tests_require=['python_debian', 'buildlog-consultant', 'breezy'],
+      tests_require=['python_debian', 'buildlog-consultant', 'breezy', 'testtools'],
       test_suite='ognibuild.tests.test_suite',
       )