diff --git a/src/tests/test.py b/src/tests/test.py
index be9f851..673d706 100644
--- a/src/tests/test.py
+++ b/src/tests/test.py
@@ -12,6 +12,70 @@ except ImportError:
     import documentation as doc  # good with `python src/tests/test.py`
 
 
+try:
+    from PyQt5 import QtGui, QtWidgets
+except ImportError:
+    pass
+else:
+    class PlainActionCreator:
+        def __init__(self):
+            self.messages = []
+            self.action = QtWidgets.QAction()
+            self.action.triggered.connect(self.ActionCallbackNoArg)
+            self.action.triggered.connect(self.ActionCallbackOneArg)
+            self.action.triggered.connect(self.ActionCallbackAnyArgs)
+
+        def ActionCallbackNoArg(self):
+            self.messages.append(('ActionCallbackNoArg',))
+
+        def ActionCallbackOneArg(self, value):
+            self.messages.append(('ActionCallbackOneArg', value))
+
+        def ActionCallbackAnyArgs(self, *args, **kwargs):
+            self.messages.append(('ActionCallbackAnyArgs', args, kwargs))
+
+
+    @decorator
+    def dummy_decorator(f, *args, **kwargs):
+        return f(*args, **kwargs)
+
+
+    class DecoratedActionCreator(PlainActionCreator):
+        @dummy_decorator
+        def ActionCallbackNoArg(self):
+            self.messages.append(('ActionCallbackNoArg',))
+
+        @dummy_decorator
+        def ActionCallbackOneArg(self, value):
+            self.messages.append(('ActionCallbackOneArg', value))
+
+        @dummy_decorator
+        def ActionCallbackAnyArgs(self, *args, **kwargs):
+            self.messages.append(('ActionCallbackAnyArgs', args, kwargs))
+
+    class QtActionTestCase(unittest.TestCase):
+        def test_qt_decorator_signature_preserving_interaction_methods(self):
+            """
+            This test that decorated methods have the signature respected by qt.
+            The problem does not show up on free functions.
+            """
+            # Sanity: Qt respect "plain" method signatures.
+            plain = PlainActionCreator()
+            plain.action.trigger()
+            self.assertEqual(
+                plain.messages,
+                [
+                    ('ActionCallbackNoArg',),
+                    ('ActionCallbackOneArg', False),
+                    ('ActionCallbackAnyArgs', (False,), {}),
+                ],
+            )
+            # Qt should also respect decorated method signatures.
+            decorated = DecoratedActionCreator()
+            decorated.action.trigger()  # If qt/decorator interaction fail this should cause an error.
+            self.assertEqual(decorated.messages, plain.messages)
+
+
 @contextmanager
 def assertRaises(etype):
     """This works in Python 2.6 too"""