diff --git a/tests/test_mp_proxy_auxiliary.py b/tests/test_mp_proxy_auxiliary.py
index 5a8cdf23..9da8cc7c 100644
--- a/tests/test_mp_proxy_auxiliary.py
+++ b/tests/test_mp_proxy_auxiliary.py
@@ -301,10 +301,12 @@ def test_getattr_physical_cchannel(
     proxy_inst.lock.__exit__.assert_not_called()
 
     # attribute does not exist
-    with pytest.raises(AttributeError, match="object has no attribute does_not_exist"):
+    with pytest.raises(
+        AttributeError, match="object has no attribute 'does_not_exist'"
+    ):
         mock_aux1.channel.does_not_exist
-    proxy_inst.lock.__enter__.assert_not_called()
-    proxy_inst.lock.__exit__.assert_not_called()
+    proxy_inst.lock.__enter__.assert_called_once()
+    proxy_inst.lock.__exit__.assert_called_once()
 
 
 def test_create_auxiliary_instance(mp_proxy_auxiliary_inst, caplog):
diff --git a/tests/test_proxy_auxiliary.py b/tests/test_proxy_auxiliary.py
index 8bd372f0..e3d3af02 100644
--- a/tests/test_proxy_auxiliary.py
+++ b/tests/test_proxy_auxiliary.py
@@ -184,10 +184,12 @@ def test_getattr_physical_cchannel(
     proxy_inst.lock.__exit__.assert_not_called()
 
     # attribute does not exist
-    with pytest.raises(AttributeError, match="object has no attribute does_not_exist"):
+    with pytest.raises(
+        AttributeError, match="object has no attribute 'does_not_exist'"
+    ):
         mock_aux1.channel.does_not_exist
-    proxy_inst.lock.__enter__.assert_not_called()
-    proxy_inst.lock.__exit__.assert_not_called()
+    proxy_inst.lock.__enter__.assert_called_once()
+    proxy_inst.lock.__exit__.assert_called_once()
 
 
 def test_get_proxy_con_pre_load(mocker, cchannel_inst):