diff --git a/ironic_tempest_plugin/tests/api/admin/test_nodes.py b/ironic_tempest_plugin/tests/api/admin/test_nodes.py
index e1663ea..3e6f1f9 100644
--- a/ironic_tempest_plugin/tests/api/admin/test_nodes.py
+++ b/ironic_tempest_plugin/tests/api/admin/test_nodes.py
@@ -249,14 +249,8 @@
 
 class TestNodesResourceClassOldApi(base.BaseBaremetalTest):
 
-    old_microversion = '1.20'
-
     def setUp(self):
         super(TestNodesResourceClassOldApi, self).setUp()
-        self.useFixture(
-            api_microversion_fixture.APIMicroversionFixture(
-                TestNodesResourceClassOldApi.old_microversion)
-        )
         _, self.chassis = self.create_chassis()
         _, self.node = self.create_node(self.chassis['uuid'])
 
diff --git a/ironic_tempest_plugin/tests/api/admin/test_ports_negative.py b/ironic_tempest_plugin/tests/api/admin/test_ports_negative.py
index 3d9d8db..492c86c 100644
--- a/ironic_tempest_plugin/tests/api/admin/test_ports_negative.py
+++ b/ironic_tempest_plugin/tests/api/admin/test_ports_negative.py
@@ -343,15 +343,8 @@
 class TestPortsWithPhysicalNetworkOldAPI(base.BaseBaremetalTest):
     """Negative tests for ports with physical network information."""
 
-    old_microversion = '1.33'
-
     def setUp(self):
         super(TestPortsWithPhysicalNetworkOldAPI, self).setUp()
-
-        self.useFixture(
-            api_microversion_fixture.APIMicroversionFixture(
-                TestPortsWithPhysicalNetworkOldAPI.old_microversion)
-        )
         _, self.chassis = self.create_chassis()
         _, self.node = self.create_node(self.chassis['uuid'])