diff --git a/_pytest/python.py b/_pytest/python.py
index 6548cdbf5..0ad18b3ef 100644
--- a/_pytest/python.py
+++ b/_pytest/python.py
@@ -1918,14 +1918,14 @@ class FixtureManager:
         autousenames = []
         for name in dir(holderobj):
             obj = getattr(holderobj, name, None)
-            if not callable(obj):
-                continue
             # fixture functions have a pytest_funcarg__ prefix (pre-2.3 style)
             # or are "@pytest.fixture" marked
             marker = getfixturemarker(obj)
             if marker is None:
                 if not name.startswith(self._argprefix):
                     continue
+                if not callable(obj):
+                    continue
                 marker = defaultfuncargprefixmarker
                 name = name[len(self._argprefix):]
             elif not isinstance(marker, FixtureFunctionMarker):