diff --git a/src/_pytest/python.py b/src/_pytest/python.py
index 79cf0476b..e143d28d1 100644
--- a/src/_pytest/python.py
+++ b/src/_pytest/python.py
@@ -403,8 +403,8 @@ class PyCollector(PyobjMixin, nodes.Collector):
 
     def istestfunction(self, obj: object, name: str) -> bool:
         if self.funcnamefilter(name) or self.isnosetest(obj):
-            if isinstance(obj, staticmethod) or isinstance(obj, classmethod):
-                # staticmethods need to be unwrapped.
+            if isinstance(obj, (staticmethod, classmethod)):
+                # staticmethods and classmethods need to be unwrapped.
                 obj = safe_getattr(obj, "__func__", False)
             return callable(obj) and fixtures.getfixturemarker(obj) is None
         else: