diff --git a/_pytest/python.py b/_pytest/python.py
index 5b3e0138f..94f83a37d 100644
--- a/_pytest/python.py
+++ b/_pytest/python.py
@@ -1122,6 +1122,8 @@ class Function(FunctionMixin, nodes.Item, fixtures.FuncargnamesCompatAttr):
     Python test function.
     """
     _genid = None
+    # disable since functions handle it themselfes
+    _ALLOW_MARKERS = False
 
     def __init__(self, name, parent, args=None, config=None,
                  callspec=None, callobj=NOTSET, keywords=None, session=None,