diff --git a/tests/test_build/test_build.py b/tests/test_build/test_build.py
index f109b33a..b23165c9 100644
--- a/tests/test_build/test_build.py
+++ b/tests/test_build/test_build.py
@@ -170,7 +170,6 @@ class TestModuleBuilder(GenericBuilder):
             TestModuleBuilder.on_cancel_cb(self, task_id)
 
 
-@unittest.skip("These are disabled until ralph can figure out how to run the reactor in the tests.")
 class TestBuild(unittest.TestCase):
 
     def setUp(self):