refactor disabling markers

src/_pytest/python.py

@@ -432,6 +432,14 @@ class PyCollector(PyobjMixin, nodes.Collector):
 class Module(nodes.File, PyCollector):
     """ Collector for test classes and functions. """
 
+    def __init__(self, fspath, parent=None, config=None, session=None, nodeid=None):
+        if fspath.basename == "__init__.py":
+            self._ALLOW_MARKERS = False
+
+        nodes.FSCollector.__init__(
+            self, fspath, parent=parent, config=config, session=session, nodeid=nodeid
+        )
+
     def _getobj(self):
         return self._importtestmodule()
 
@@ -548,15 +556,6 @@ class Module(nodes.File, PyCollector):
         return mod
 
 
-class InitModule(Module):
-    _ALLOW_MARKERS = False
-
-    def __repr__(self):
-        if type(self) == InitModule:
-            return "<{} {}>".format(Module.__name__, getattr(self, "name", None))
-        return super().__repr__()
-
-
 class Package(Module):
     def __init__(self, fspath, parent=None, config=None, session=None, nodeid=None):
         session = parent.session
@@ -646,7 +645,7 @@ class Package(Module):
         if init_module.check(file=1) and path_matches_patterns(
             init_module, self.config.getini("python_files")
         ):
-            yield InitModule(init_module, self)
+            yield Module(init_module, self)
         pkg_prefixes = set()
         for path in this_path.visit(rec=self._recurse, bf=True, sort=True):
             # We will visit our own __init__.py file, in which case we skip it.