diff --git a/tests/test_updater.py b/tests/test_updater.py
index 4a223d42..d576397e 100644
--- a/tests/test_updater.py
+++ b/tests/test_updater.py
@@ -721,6 +721,10 @@ def test_3__update_metadata(self):
       for mirror_error in six.itervalues(e.mirror_errors):
         assert isinstance(mirror_error, securesystemslib.exceptions.BadVersionNumberError)
 
+    else:
+      self.fail(
+          'Expected a NoWorkingMirrorError composed of BadVersionNumberErrors')
+
     # Verify that the specific exception raised is correct for the previous
     # case.  The version number is checked, so the specific error in
     # this case should be 'securesystemslib.exceptions.BadVersionNumberError'.
@@ -733,6 +737,10 @@ def test_3__update_metadata(self):
       for mirror_error in six.itervalues(e.mirror_errors):
         assert isinstance(mirror_error, securesystemslib.exceptions.BadVersionNumberError)
 
+    else:
+      self.fail(
+          'Expected a NoWorkingMirrorError composed of BadVersionNumberErrors')
+
 
 
 
@@ -1274,6 +1282,10 @@ def test_6_download_target(self):
     except OSError as e:
       self.assertTrue(e.errno == errno.ENAMETOOLONG or e.errno == errno.ENOENT)
 
+    else:
+      self.fail('Expected an OSError of type ENAMETOOLONG or ENOENT')
+
+
     # Test: Invalid arguments.
     self.assertRaises(securesystemslib.exceptions.FormatError,
                       self.repository_updater.download_target,
@@ -1303,6 +1315,12 @@ def test_6_download_target(self):
       # which does not generate specific exception errors.
       self.assertEqual(len(exception.mirror_errors), 0)
 
+    else:
+      self.fail(
+          'Expected a NoWorkingMirrorError with zero mirror errors in it.')
+
+
+
 
 
   def test_7_updated_targets(self):