Merge pull request #6201 from asottile/mm

Merge master into features

src/_pytest/python.py

@@ -973,6 +973,12 @@ class Metafunc:
         )
         del argvalues
 
+        if "request" in argnames:
+            fail(
+                "'request' is a reserved name and cannot be used in @pytest.mark.parametrize",
+                pytrace=False,
+            )
+
         if scope is None:
             scope = _find_parametrized_scope(argnames, self._arg2fixturedefs, indirect)