diff --git a/tempest/scenario/utils.py b/tempest/scenario/utils.py
index c20f20c..e6624a3 100644
--- a/tempest/scenario/utils.py
+++ b/tempest/scenario/utils.py
@@ -25,6 +25,7 @@
 from tempest import clients
 from tempest.common.utils import misc
 from tempest import config
+from tempest import exceptions
 
 CONF = config.CONF
 
@@ -151,9 +152,12 @@
         loader, standard_tests, pattern = args
     else:
         standard_tests, module, loader = args
-    scenario_utils = InputScenarioUtils()
-    scenario_flavor = scenario_utils.scenario_flavors
-    scenario_image = scenario_utils.scenario_images
+    try:
+        scenario_utils = InputScenarioUtils()
+        scenario_flavor = scenario_utils.scenario_flavors
+        scenario_image = scenario_utils.scenario_images
+    except exceptions.InvalidConfiguration:
+        return standard_tests
     for test in testtools.iterate_tests(standard_tests):
         setattr(test, 'scenarios', testscenarios.multiply_scenarios(
             scenario_image,
diff --git a/tempest/tests/test_list_tests.py b/tempest/tests/test_list_tests.py
index 157fc5f..efdb413 100644
--- a/tempest/tests/test_list_tests.py
+++ b/tempest/tests/test_list_tests.py
@@ -12,6 +12,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+import os
 import re
 import subprocess
 
@@ -20,16 +21,23 @@
 
 class TestTestList(base.TestCase):
 
-    def test_no_import_errors(self):
+    def test_testr_list_tests_no_errors(self):
+        # Remove unit test discover path from env to test tempest tests
+        test_env = os.environ.copy()
+        test_env.pop('OS_TEST_PATH')
         import_failures = []
-        p = subprocess.Popen(['testr', 'list-tests'], stdout=subprocess.PIPE)
-        ids = p.stdout.read()
+        p = subprocess.Popen(['testr', 'list-tests'], stdout=subprocess.PIPE,
+                             env=test_env)
+        ids, err = p.communicate()
+        self.assertEqual(0, p.returncode,
+                         "test discovery failed, one or more files cause an "
+                         "error on import")
         ids = ids.split('\n')
         for test_id in ids:
             if re.match('(\w+\.){3}\w+', test_id):
                 if not test_id.startswith('tempest.'):
-                    fail_id = test_id.split('unittest.loader.ModuleImport'
-                                            'Failure.')[1]
+                    parts = test_id.partition('tempest')
+                    fail_id = parts[1] + parts[2]
                     import_failures.append(fail_id)
         error_message = ("The following tests have import failures and aren't"
                          " being run with test filters %s" % import_failures)