diff --git a/.zuul.yaml b/.zuul.yaml
index ef9b0eb..462841c 100644
--- a/.zuul.yaml
+++ b/.zuul.yaml
@@ -272,6 +272,20 @@
       tempest_concurrency: 2
 
 - job:
+    name: tempest-slow-py3
+    parent: tempest-slow
+    vars:
+      devstack_localrc:
+        USE_PYTHON3: true
+      devstack_services:
+        s-account: false
+        s-container: false
+        s-object: false
+        s-proxy: false
+        # without Swift, c-bak cannot run (in the Gate at least)
+        c-bak: false
+
+- job:
     name: tempest-full-rocky
     parent: tempest-full
     nodeset: openstack-single-node-xenial
@@ -513,6 +527,8 @@
               # tools/ is not here since this relies on a script in tools/.
         - tempest-slow:
             irrelevant-files: *tempest-irrelevant-files
+        - tempest-slow-py3:
+            irrelevant-files: *tempest-irrelevant-files
         - nova-live-migration:
             voting: false
             irrelevant-files: *tempest-irrelevant-files
@@ -556,7 +572,7 @@
       jobs:
         - nova-multiattach:
             irrelevant-files: *tempest-irrelevant-files
-        - tempest-slow:
+        - tempest-slow-py3:
             irrelevant-files: *tempest-irrelevant-files
         - neutron-grenade-multinode:
             irrelevant-files: *tempest-irrelevant-files
diff --git a/tempest/api/compute/base.py b/tempest/api/compute/base.py
index 09dd409..624a99e 100644
--- a/tempest/api/compute/base.py
+++ b/tempest/api/compute/base.py
@@ -457,7 +457,7 @@
             else:
                 msg = ('When validation.connect_method equals floating, '
                        'validation_resources cannot be None')
-                raise exceptions.InvalidParam(invalid_param=msg)
+                raise lib_exc.InvalidParam(invalid_param=msg)
         elif CONF.validation.connect_method == 'fixed':
             addresses = server['addresses'][CONF.validation.network_for_ssh]
             for address in addresses:
diff --git a/tempest/tests/cmd/test_run.py b/tempest/tests/cmd/test_run.py
index e159cdc..5091841 100644
--- a/tempest/tests/cmd/test_run.py
+++ b/tempest/tests/cmd/test_run.py
@@ -108,6 +108,27 @@
         subprocess.call(['stestr', 'init'])
         self.assertRunExit(['tempest', 'run', '--regex', 'passing'], 0)
 
+    def test_tempest_run_failing(self):
+        self.assertRunExit(['tempest', 'run', '--regex', 'failing'], 1)
+
+    def test_tempest_run_failing_with_stestr_repository(self):
+        subprocess.call(['stestr', 'init'])
+        self.assertRunExit(['tempest', 'run', '--regex', 'failing'], 1)
+
+    def test_tempest_run_blackregex_failing(self):
+        self.assertRunExit(['tempest', 'run', '--black-regex', 'failing'], 0)
+
+    def test_tempest_run_blackregex_failing_with_stestr_repository(self):
+        subprocess.call(['stestr', 'init'])
+        self.assertRunExit(['tempest', 'run', '--black-regex', 'failing'], 0)
+
+    def test_tempest_run_blackregex_passing(self):
+        self.assertRunExit(['tempest', 'run', '--black-regex', 'passing'], 1)
+
+    def test_tempest_run_blackregex_passing_with_stestr_repository(self):
+        subprocess.call(['stestr', 'init'])
+        self.assertRunExit(['tempest', 'run', '--black-regex', 'passing'], 1)
+
     def test_tempest_run_fails(self):
         self.assertRunExit(['tempest', 'run'], 1)