diff --git a/cardano_node_tests/tests/tests_conway/test_committee.py b/cardano_node_tests/tests/tests_conway/test_committee.py
index f292bd684..0a8a623c1 100644
--- a/cardano_node_tests/tests/tests_conway/test_committee.py
+++ b/cardano_node_tests/tests/tests_conway/test_committee.py
@@ -105,8 +105,8 @@ class TestCommittee:
     @pytest.mark.smoke
     def test_register_hot_key_no_cc_member(
         self,
-        cluster_use_committee: governance_utils.GovClusterT,
-        payment_addr_comm: clusterlib.AddressRecord,
+        cluster: clusterlib.ClusterLib,
+        pool_user: clusterlib.PoolUser,
         use_build_cmd: bool,
         submit_method: str,
     ):
@@ -114,7 +114,6 @@ def test_register_hot_key_no_cc_member(
 
         Expect failure.
         """
-        cluster, __ = cluster_use_committee
         temp_template = common.get_test_id(cluster)
 
         cc_auth_record = governance_utils.get_cc_member_auth_record(
@@ -124,7 +123,7 @@ def test_register_hot_key_no_cc_member(
 
         tx_files_auth = clusterlib.TxFiles(
             certificate_files=[cc_auth_record.auth_cert],
-            signing_key_files=[payment_addr_comm.skey_file, cc_auth_record.cold_key_pair.skey_file],
+            signing_key_files=[pool_user.payment.skey_file, cc_auth_record.cold_key_pair.skey_file],
         )
 
         # Try to submit a Hot Credential Authorization certificate without being a CC member
@@ -132,7 +131,7 @@ def test_register_hot_key_no_cc_member(
             clusterlib_utils.build_and_submit_tx(
                 cluster_obj=cluster,
                 name_template=f"{temp_template}_auth",
-                src_address=payment_addr_comm.address,
+                src_address=pool_user.payment.address,
                 submit_method=submit_method,
                 use_build_cmd=use_build_cmd,
                 tx_files=tx_files_auth,
diff --git a/cardano_node_tests/tests/tests_conway/test_guardrails.py b/cardano_node_tests/tests/tests_conway/test_guardrails.py
index d00917b5d..d5476af9b 100644
--- a/cardano_node_tests/tests/tests_conway/test_guardrails.py
+++ b/cardano_node_tests/tests/tests_conway/test_guardrails.py
@@ -1567,7 +1567,6 @@ def cost_models(cluster_with_constitution: ClusterWithConstitutionRecord):
 class TestGovernanceGuardrails:
     @allure.link(helpers.get_vcs_link())
     @pytest.mark.long
-    @pytest.mark.testnets
     def test_guardrails(
         self,
         cluster_with_constitution: ClusterWithConstitutionRecord,
diff --git a/cardano_node_tests/utils/governance_setup.py b/cardano_node_tests/utils/governance_setup.py
index 49d44ff8f..87e5fe6ac 100644
--- a/cardano_node_tests/utils/governance_setup.py
+++ b/cardano_node_tests/utils/governance_setup.py
@@ -250,6 +250,11 @@ def get_default_governance(
     cluster_manager: cluster_management.ClusterManager,
     cluster_obj: clusterlib.ClusterLib,
 ) -> governance_utils.GovernanceRecords:
+    """Get default governance data for CC members, DReps and SPOs."""
+    if cluster_nodes.get_cluster_type().type == cluster_nodes.ClusterType.TESTNET:
+        err = "Default governance is not available on testnets"
+        raise ValueError(err)
+
     cluster_env = cluster_nodes.get_cluster_env()
     gov_data_dir = cluster_env.state_dir / GOV_DATA_DIR
     gov_data_store = gov_data_dir / GOV_DATA_STORE