diff --git a/openstack/tests/functional/baremetal/test_baremetal_inspection_rules.py b/openstack/tests/functional/baremetal/test_baremetal_inspection_rules.py
index c7c75a597..c9d3e14c7 100644
--- a/openstack/tests/functional/baremetal/test_baremetal_inspection_rules.py
+++ b/openstack/tests/functional/baremetal/test_baremetal_inspection_rules.py
@@ -169,7 +169,6 @@ class TestBareMetalInspectionRule(base.BaseBaremetalTest):
         updated_actions = [
             {
                 "op": "set-attribute",
-                "loop": [],
                 "args": ["/driver", "fake"],
             }
         ]
diff --git a/openstack/tests/unit/test_utils.py b/openstack/tests/unit/test_utils.py
index ee193b0e7..ea726039b 100644
--- a/openstack/tests/unit/test_utils.py
+++ b/openstack/tests/unit/test_utils.py
@@ -223,13 +223,12 @@ class TestMaximumSupportedMicroversion(base.TestCase):
 
 class TestOsServiceTypesVersion(base.TestCase):
     def test_ost_version(self):
-        ost_version = '2019-05-01T19:53:21.498745'
+        ost_version = '2022-09-13T15:34:32.154125'
         self.assertEqual(
             ost_version,
             os_service_types.ServiceTypes().version,
             "This project must be pinned to the latest version of "
-            "os-service-types. Please bump requirements.txt and "
-            "lower-constraints.txt accordingly.",
+            "os-service-types. Please bump requirements.txt accordingly.",
         )
 
 
diff --git a/requirements.txt b/requirements.txt
index b2a10c619..5a531f3f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ iso8601>=0.1.11 # MIT
 jmespath>=0.9.0 # MIT
 jsonpatch!=1.20,>=1.16 # BSD
 keystoneauth1>=5.10.0 # Apache-2.0
-os-service-types>=1.7.0 # Apache-2.0
+os-service-types>=1.8.0 # Apache-2.0
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 platformdirs>=3 # MIT License
 psutil>=3.2.2 # BSD