diff --git a/mypy/fastparse.py b/mypy/fastparse.py
index 99d5c48c92d7..9dbd3b7572c1 100644
--- a/mypy/fastparse.py
+++ b/mypy/fastparse.py
@@ -936,7 +936,7 @@ def do_func_def(
 
         lineno = n.lineno
         args = self.transform_args(n.args, lineno, no_type_check=no_type_check)
-        if special_function_elide_names(n.name):
+        if self.options.pos_only_special_methods and special_function_elide_names(n.name):
             for arg in args:
                 arg.pos_only = True
 
diff --git a/mypy/options.py b/mypy/options.py
index ad4b26cca095..bc592eebdb3e 100644
--- a/mypy/options.py
+++ b/mypy/options.py
@@ -400,6 +400,9 @@ def __init__(self) -> None:
         # Export line-level, limited, fine-grained dependency information in cache data
         # (undocumented feature).
         self.export_ref_info = False
+        # Treat special methods as being implicitly positional-only.
+        # Set to False when running stubtest.
+        self.pos_only_special_methods = True
 
         self.disable_bytearray_promotion = False
         self.disable_memoryview_promotion = False
diff --git a/mypy/stubtest.py b/mypy/stubtest.py
index ee15fed81b4b..0a6932ada553 100644
--- a/mypy/stubtest.py
+++ b/mypy/stubtest.py
@@ -1060,7 +1060,6 @@ def _verify_signature(
             and not stub_arg.variable.name.startswith("__")
             and stub_arg.variable.name.strip("_") != "self"
             and stub_arg.variable.name.strip("_") != "cls"
-            and not is_dunder(function_name, exclude_special=True)  # noisy for dunder methods
         ):
             yield (
                 f'stub parameter "{stub_arg.variable.name}" should be positional-only '
@@ -2235,6 +2234,7 @@ def test_stubs(args: _Arguments, use_builtins_fixtures: bool = False) -> int:
     options.use_builtins_fixtures = use_builtins_fixtures
     options.show_traceback = args.show_traceback
     options.pdb = args.pdb
+    options.pos_only_special_methods = False
 
     if options.config_file:
 
diff --git a/mypy/test/teststubtest.py b/mypy/test/teststubtest.py
index 28263e20099d..9be499d9cb48 100644
--- a/mypy/test/teststubtest.py
+++ b/mypy/test/teststubtest.py
@@ -1652,6 +1652,16 @@ def test_dunders(self) -> Iterator[Case]:
             runtime="class D:\n  def __class_getitem__(cls, type): ...",
             error=None,
         )
+        yield Case(
+            stub="class E:\n  def __getitem__(self, item: object) -> object: ...",
+            runtime="class E:\n  def __getitem__(self, item: object, /) -> object: ...",
+            error="E.__getitem__",
+        )
+        yield Case(
+            stub="class F:\n  def __getitem__(self, item: object, /) -> object: ...",
+            runtime="class F:\n  def __getitem__(self, item: object) -> object: ...",
+            error=None,
+        )
 
     @collect_cases
     def test_not_subclassable(self) -> Iterator[Case]: