diff --git a/config_tempest/config_tempest.py b/config_tempest/config_tempest.py
index 9127a709..4c9f5918 100755
--- a/config_tempest/config_tempest.py
+++ b/config_tempest/config_tempest.py
@@ -161,9 +161,11 @@ def main():
         # To maintain backward compatibility
         # Moved to auth
         conf.set("identity", "admin_password", "")
-        conf.set("auth", "allow_tenant_isolation", "False")
+        conf.set("auth", "use_dynamic_credentials", "False")
     if args.use_test_accounts:
-        conf.set("auth", "allow_tenant_isolation", "True")
+        # new way for running using accounts file
+        conf.set("auth", "use_dynamic_credentials", "False")
+        conf.set("auth", "test_accounts_file", "etc/accounts.yaml")
     clients = ClientManager(conf, not args.non_admin, args)
     swift_discover = conf.get_defaulted('object-storage-feature-enabled',
                                         'discoverability')
diff --git a/config_tempest/tests/base.py b/config_tempest/tests/base.py
index 2875428c..9060f3ca 100644
--- a/config_tempest/tests/base.py
+++ b/config_tempest/tests/base.py
@@ -41,7 +41,7 @@ class BaseConfigTempestTest(base.BaseTestCase):
         conf.set("identity", "admin_username", "admin")
         conf.set("identity", "admin_tenant_name", "adminTenant")
         conf.set("identity", "admin_password", "adminPass")
-        conf.set("auth", "allow_tenant_isolation", "False")
+        conf.set("auth", "use_dynamic_credentials", "False")
         return conf
 
     def _get_alt_conf(self, V2, V3):
@@ -58,7 +58,7 @@ class BaseConfigTempestTest(base.BaseTestCase):
         conf.set("auth", "admin_username", "admin")
         conf.set("auth", "admin_project_name", "adminTenant")
         conf.set("auth", "admin_password", "adminPass")
-        conf.set("auth", "allow_tenant_isolation", "False")
+        conf.set("auth", "use_dynamic_credentials", "True")
         return conf
 
     @mock.patch('os_client_config.cloud_config.CloudConfig')
diff --git a/config_tempest/tests/test_config_tempest.py b/config_tempest/tests/test_config_tempest.py
index 4f3e447c..f5e04ebb 100644
--- a/config_tempest/tests/test_config_tempest.py
+++ b/config_tempest/tests/test_config_tempest.py
@@ -129,6 +129,9 @@ class TestClientManager(BaseConfigTempestTest):
         # check if admin tenant id was set
         admin_tenant_id = self.conf.get("identity", "admin_tenant_id")
         self.assertEqual(admin_tenant_id, "my_fake_id")
+        use_dynamic_creds_bool = self.conf.get("auth",
+                                               "use_dynamic_credentials")
+        self.assertEqual(use_dynamic_creds_bool, "True")
 
 
 class TestOsClientConfigSupport(BaseConfigTempestTest):
diff --git a/releasenotes/notes/replace-tenant-isolation-with-dynamic-creds-e79e46c03851ff1c.yaml b/releasenotes/notes/replace-tenant-isolation-with-dynamic-creds-e79e46c03851ff1c.yaml
new file mode 100644
index 00000000..1fa89398
--- /dev/null
+++ b/releasenotes/notes/replace-tenant-isolation-with-dynamic-creds-e79e46c03851ff1c.yaml
@@ -0,0 +1,6 @@
+---
+prelude: >
+    Deprecate allow_tenant_isolation parameter.
+deprecations:
+  - |
+    Replace allow_tenant_isolation with use_dynamic_credentials