diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
index 2212d2323dd..41ab27f37bf 100644
--- a/Lib/test/test_types.py
+++ b/Lib/test/test_types.py
@@ -527,18 +527,16 @@ def test(f, format_spec, result):
         self.assertRaises(TypeError, 3.0.__format__, None)
         self.assertRaises(TypeError, 3.0.__format__, 0)
 
-        # other format specifiers shouldn't work on floats,
-        #  in particular int specifiers
-        for format_spec in ([chr(x) for x in range(ord('a'), ord('z')+1)] +
-                            [chr(x) for x in range(ord('A'), ord('Z')+1)]):
-            if not format_spec in 'eEfFgGn%':
-                self.assertRaises(ValueError, format, 0.0, format_spec)
-                self.assertRaises(ValueError, format, 1.0, format_spec)
-                self.assertRaises(ValueError, format, -1.0, format_spec)
-                self.assertRaises(ValueError, format, 1e100, format_spec)
-                self.assertRaises(ValueError, format, -1e100, format_spec)
-                self.assertRaises(ValueError, format, 1e-100, format_spec)
-                self.assertRaises(ValueError, format, -1e-100, format_spec)
+        # confirm format options expected to fail on floats, such as integer
+        # presentation types
+        for format_spec in 'sbcdoxX':
+            self.assertRaises(ValueError, format, 0.0, format_spec)
+            self.assertRaises(ValueError, format, 1.0, format_spec)
+            self.assertRaises(ValueError, format, -1.0, format_spec)
+            self.assertRaises(ValueError, format, 1e100, format_spec)
+            self.assertRaises(ValueError, format, -1e100, format_spec)
+            self.assertRaises(ValueError, format, 1e-100, format_spec)
+            self.assertRaises(ValueError, format, -1e-100, format_spec)
 
         # Alternate float formatting
         test(1.0, '.0e', '1e+00')
@@ -604,6 +602,14 @@ def test_slot_wrapper_types(self):
         self.assertIsInstance(object.__lt__, types.WrapperDescriptorType)
         self.assertIsInstance(int.__lt__, types.WrapperDescriptorType)
 
+    # TODO: RUSTPYTHON No signature found in builtin method __get__ of 'method_descriptor' objects.
+    @unittest.expectedFailure
+    def test_dunder_get_signature(self):
+        sig = inspect.signature(object.__init__.__get__)
+        self.assertEqual(list(sig.parameters), ["instance", "owner"])
+        # gh-93021: Second parameter is optional
+        self.assertIs(sig.parameters["owner"].default, None)
+
     def test_method_wrapper_types(self):
         self.assertIsInstance(object().__init__, types.MethodWrapperType)
         self.assertIsInstance(object().__str__, types.MethodWrapperType)
@@ -629,6 +635,14 @@ def test_notimplemented_type(self):
     def test_none_type(self):
         self.assertIsInstance(None, types.NoneType)
 
+    def test_traceback_and_frame_types(self):
+        try:
+            raise OSError
+        except OSError as e:
+            exc = e
+        self.assertIsInstance(exc.__traceback__, types.TracebackType)
+        self.assertIsInstance(exc.__traceback__.tb_frame, types.FrameType)
+
 
 class UnionTests(unittest.TestCase):
 
@@ -878,7 +892,7 @@ def test_union_parameter_substitution_errors(self):
         T = typing.TypeVar("T")
         x = int | T
         with self.assertRaises(TypeError):
-            x[42]
+            x[int, str]
 
     def test_or_type_operator_with_forward(self):
         T = typing.TypeVar('T')
@@ -958,9 +972,9 @@ def __eq__(self, other):
         with self.assertRaises(ZeroDivisionError):
             list[int] | list[bt]
 
-        union_ga = (int | list[str], int | collections.abc.Callable[..., str],
-                    int | d)
-        # Raise error when isinstance(type, type | genericalias)
+        union_ga = (list[str] | int, collections.abc.Callable[..., str] | int,
+                    d | int)
+        # Raise error when isinstance(type, genericalias | type)
         for type_ in union_ga:
             with self.subTest(f"check isinstance/issubclass is invalid for {type_}"):
                 with self.assertRaises(TypeError):