Fix false positive for arguments-differ when overriding __init_subclass__.

Closes #8919

Author: mbyrnepr2

doc/whatsnew/fragments/8919.false_positive

@@ -0,0 +1,3 @@
+Fix false positive for ``arguments-differ`` when overriding `__init_subclass__`.
+
+Closes #8919

pylint/checkers/classes/class_checker.py

@@ -370,14 +370,6 @@ def _different_parameters(
         if different_kwonly:
             output_messages += different_kwonly
 
-    if original.name in PYMETHODS:
-        # Ignore the difference for special methods. If the parameter
-        # numbers are different, then that is going to be caught by
-        # unexpected-special-method-signature.
-        # If the names are different, it doesn't matter, since they can't
-        # be used as keyword arguments anyway.
-        output_messages.clear()
-
     # Arguments will only violate LSP if there are variadics in the original
     # that are then removed from the overridden
     kwarg_lost = original.args.kwarg and not overridden.args.kwarg
@@ -386,6 +378,14 @@ def _different_parameters(
     if kwarg_lost or vararg_lost:
         output_messages += ["Variadics removed in"]
 
+    if original.name in PYMETHODS:
+        # Ignore the difference for special methods. If the parameter
+        # numbers are different, then that is going to be caught by
+        # unexpected-special-method-signature.
+        # If the names are different, it doesn't matter, since they can't
+        # be used as keyword arguments anyway.
+        output_messages.clear()
+
     return output_messages
 
 

tests/functional/a/arguments_differ.py

@@ -358,3 +358,13 @@ def method(self, *, arg1):
 class ClassWithNewNonDefaultKeywordOnly(AClass):
     def method(self, *, arg2, arg1=None):  # [arguments-differ]
         ...
+
+
+# Exclude `__init_subclass__` from the check:
+class InitSubclassParent:
+    def __init_subclass__(cls, *args, **kwargs):
+        ...
+
+class InitSubclassChild(InitSubclassParent):
+    def __init_subclass__(cls, /, **kwargs) -> None:
+        super().__init_subclass__(**kwargs)