diff --git a/oslo_limit/fixture.py b/oslo_limit/fixture.py
index 1964961..70f0b7d 100644
--- a/oslo_limit/fixture.py
+++ b/oslo_limit/fixture.py
@@ -36,13 +36,15 @@ def _fake_services(
     )
 
 
-def _fake_regions(
-    **query: dict[str, Any],
-) -> Generator[_region.Region, None, None]:
-    # we are the only ones calling this, so we know exactly what we should be
-    # calling it with
-    assert set(query) == {'name'}
-    yield sdk_fakes.generate_fake_resource(_region.Region, name=query['name'])
+def _fake_region(
+    region: str | _region.Region,
+) -> _region.Region:
+    if isinstance(region, str):
+        region_id = region
+    else:
+        region_id = region.id
+
+    return sdk_fakes.generate_fake_resource(_region.Region, id=region_id)
 
 
 def _fake_endpoints(
@@ -156,7 +158,7 @@ class LimitFixture(fixtures.Fixture):
 
         # Then, requests by name
         self.mock_conn.services.side_effect = _fake_services
-        self.mock_conn.regions.side_effect = _fake_regions
+        self.mock_conn.get_region.side_effect = _fake_region
         self.mock_conn.endpoints.side_effect = _fake_endpoints
 
         # Finally, fake the actual limits and registered limits calls
diff --git a/oslo_limit/limit.py b/oslo_limit/limit.py
index 1b584ed..18d0e4c 100644
--- a/oslo_limit/limit.py
+++ b/oslo_limit/limit.py
@@ -396,18 +396,14 @@ class _EnforcerUtils:
         # find region (if any)
 
         if CONF.oslo_limit.endpoint_region_name is not None:
-            regions = self.connection.regions(  # type: ignore
-                name=CONF.oslo_limit.endpoint_region_name
-            )
-            regions = list(regions)
-
-            if len(regions) > 1:
-                raise ValueError("Multiple regions found")
-
-            if len(regions) == 0:
+            try:
+                region = self.connection.get_region(  # type: ignore
+                    CONF.oslo_limit.endpoint_region_name
+                )
+            except os_exceptions.ResourceNotFound:
                 raise ValueError("Region not found")
 
-            region_id = regions[0].id
+            region_id = region.id
         else:
             region_id = None
 
diff --git a/oslo_limit/tests/test_limit.py b/oslo_limit/tests/test_limit.py
index be1d52c..2792dbf 100644
--- a/oslo_limit/tests/test_limit.py
+++ b/oslo_limit/tests/test_limit.py
@@ -535,7 +535,7 @@ class TestEnforcerUtils(base.BaseTestCase):
         fake_endpoint = endpoint.Endpoint()
         self.mock_conn.endpoints.return_value = [fake_endpoint]
         fake_region = region.Region(id='REGION_ID')
-        self.mock_conn.regions.return_value = [fake_region]
+        self.mock_conn.get_region.return_value = fake_region
 
         utils = limit._EnforcerUtils()
 
@@ -544,7 +544,7 @@ class TestEnforcerUtils(base.BaseTestCase):
         self.mock_conn.services.assert_called_once_with(
             type='SERVICE_TYPE', name='SERVICE_NAME'
         )
-        self.mock_conn.regions.assert_called_once_with(name='regionOne')
+        self.mock_conn.get_region.assert_called_once_with('regionOne')
         self.mock_conn.endpoints.assert_called_once_with(
             service_id='SERVICE_ID', region_id='REGION_ID', interface='public'
         )
@@ -564,7 +564,7 @@ class TestEnforcerUtils(base.BaseTestCase):
         self.mock_conn.services.return_value = [fake_service]
         fake_endpoint = endpoint.Endpoint()
         self.mock_conn.endpoints.return_value = [fake_endpoint]
-        self.mock_conn.regions.return_value = []
+        self.mock_conn.get_region.side_effect = os_exceptions.ResourceNotFound
 
         self.assertRaises(ValueError, limit._EnforcerUtils)
 
@@ -572,36 +572,7 @@ class TestEnforcerUtils(base.BaseTestCase):
         self.mock_conn.services.assert_called_once_with(
             type='SERVICE_TYPE', name='SERVICE_NAME'
         )
-        self.mock_conn.regions.assert_called_once_with(name='regionOne')
-        self.mock_conn.endpoints.assert_not_called()
-
-    def test_get_endpoint_lookup_with_mutliple_regions(self):
-        self.config_fixture.config(group='oslo_limit', endpoint_id=None)
-        self.config_fixture.config(
-            group='oslo_limit', endpoint_service_type='SERVICE_TYPE'
-        )
-        self.config_fixture.config(
-            group='oslo_limit', endpoint_service_name='SERVICE_NAME'
-        )
-        self.config_fixture.config(
-            group='oslo_limit', endpoint_region_name='regionOne'
-        )
-        fake_service = service.Service(id='SERVICE_ID')
-        self.mock_conn.services.return_value = [fake_service]
-        fake_endpoint = endpoint.Endpoint()
-        self.mock_conn.endpoints.return_value = [fake_endpoint]
-        self.mock_conn.regions.return_value = [
-            region.Region(id='REGION_ID1'),
-            region.Region(id='REGION_ID2'),
-        ]
-
-        self.assertRaises(ValueError, limit._EnforcerUtils)
-
-        self.mock_conn.get_endpoint.assert_not_called()
-        self.mock_conn.services.assert_called_once_with(
-            type='SERVICE_TYPE', name='SERVICE_NAME'
-        )
-        self.mock_conn.regions.assert_called_once_with(name='regionOne')
+        self.mock_conn.get_region.assert_called_once_with('regionOne')
         self.mock_conn.endpoints.assert_not_called()
 
     def test_get_registered_limit_empty(self):