diff --git a/tests/test_interfaces.py b/tests/test_interfaces.py
index 329ac7d..bdb4a94 100644
--- a/tests/test_interfaces.py
+++ b/tests/test_interfaces.py
@@ -36,6 +36,7 @@
             def method(self):
                 """Method with no arguments"""
 
+        # Invoke this to ensure the line is covered
         NonImplementer().method()
         with pytest.raises(InterfaceNotImplemented):
             verify_interface(SimpleInterface, NonImplementer)
@@ -52,5 +53,6 @@
             def property(self):
                 """A concrete property"""
 
+        # Invoke this to ensure the line is covered
         NonImplementer().property
         verify_interface(SimpleInterface, NonImplementer)