diff --git a/.github/workflows/tests-integration.yaml b/.github/workflows/tests-integration.yaml
index 33df1afb..530a9016 100644
--- a/.github/workflows/tests-integration.yaml
+++ b/.github/workflows/tests-integration.yaml
@@ -25,7 +25,7 @@ jobs:
     strategy:
       max-parallel: 1
       matrix:
-        python-version: ['3.8.14', '3.9.15', '3.10.8', '3.11.8']
+        python-version: ['3.8.14', '3.9.15', '3.10.8', '3.11.8', '3.12.5']
         toolbox-image-tag: ['1.3.5-0.1.15', '1.5.0-0.1.15', '1.6.0-0.1.15']
     steps:
       - name: Checkout base branch
diff --git a/.github/workflows/tests-unit.yml b/.github/workflows/tests-unit.yml
index ae7f4872..a76b0bca 100644
--- a/.github/workflows/tests-unit.yml
+++ b/.github/workflows/tests-unit.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ '3.8', '3.9', '3.10', '3.11' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11' , '3.12']
     steps:
       - uses: actions/checkout@v3
 
diff --git a/tests/test_containers/test_kubectl.py b/tests/test_containers/test_kubectl.py
index 8435e4ee..023bdba5 100644
--- a/tests/test_containers/test_kubectl.py
+++ b/tests/test_containers/test_kubectl.py
@@ -115,7 +115,7 @@ def test_start_shell_sso(mock_refresh, kubectl_container):
 
     # we want a shell, so -> /bin/bash and refresh_sso_credentials flag
     assert container_args["command"] == "/bin/bash"
-    assert mock_refresh.called_once
+    assert mock_refresh.assert_called_once
 
     # make sure we are pointing to the right AWS credentials: /tmp/ folder for SSO
     assert container_args["environment"]["AWS_CONFIG_FILE"] == "/root/tmp/test/config"
diff --git a/tests/test_containers/test_terraform.py b/tests/test_containers/test_terraform.py
index 4c91e2de..9342d7fa 100644
--- a/tests/test_containers/test_terraform.py
+++ b/tests/test_containers/test_terraform.py
@@ -36,7 +36,7 @@ def test_refresh_credentials(mock_refresh, terraform_container):
 
     # we want a shell, so -> /bin/bash and refresh_sso_credentials flag
     assert container_args["command"] == 'echo "Done."'
-    assert mock_refresh.called_once
+    assert mock_refresh.assert_called_once
 
 
 @mock.patch("leverage.container.refresh_layer_credentials")
@@ -44,7 +44,7 @@ def test_auth_method_sso_enabled(mock_refresh, terraform_container):
     terraform_container.sso_enabled = True
     terraform_container.auth_method()
 
-    assert mock_refresh.called_once
+    assert mock_refresh.assert_called_once
 
 
 def test_auth_method_mfa_enabled(terraform_container):
diff --git a/tests/test_modules/test_credentials.py b/tests/test_modules/test_credentials.py
index 317d98d8..a73e7193 100644
--- a/tests/test_modules/test_credentials.py
+++ b/tests/test_modules/test_credentials.py
@@ -97,7 +97,7 @@ def test_configure_accounts_profiles(mocked_backup, muted_click_context):
         )
 
     # make sure we did a backup with the old credentials
-    assert mocked_backup.called_once
+    assert mocked_backup.assert_called_once
 
     # only 1 call since "out-of-project-acc" should be avoided
     assert mocked_config.call_count == 1
@@ -130,7 +130,7 @@ def test_configure_accounts_profiles_mfa(mocked_backup, mfa_device, muted_click_
         )
 
     # make sure we did a backup with the old credentials
-    assert mocked_backup.called_once
+    assert mocked_backup.assert_called_once
 
     # only 1 call since "out-of-project-acc" should be avoided
     assert mocked_config.call_count == 1