diff --git a/tempest/lib/base.py b/tempest/lib/base.py
index f687343..33a32ee 100644
--- a/tempest/lib/base.py
+++ b/tempest/lib/base.py
@@ -42,7 +42,7 @@
     def setUp(self):
         super(BaseTestCase, self).setUp()
         if not self.setUpClassCalled:
-            raise RuntimeError("setUpClass does not calls the super's"
+            raise RuntimeError("setUpClass does not calls the super's "
                                "setUpClass in the "
                                + self.__class__.__name__)
         test_timeout = os.environ.get('OS_TEST_TIMEOUT', 0)