diff --git a/Lib/test/test_memoryio.py b/Lib/test/test_memoryio.py
@@ -1026,10 +1026,6 @@ def test_relative_seek(self):
    def test_flags(self):
        return super().test_flags()

-    @unittest.expectedFailure  # TODO: RUSTPYTHON; AttributeError: 'StringIO' object has no attribute 'detach'
-    def test_detach(self):
-        return super().test_detach()
-
    @unittest.expectedFailure  # TODO: RUSTPYTHON; AttributeError: 'StringIO' object has no attribute 'newlines'. Did you mean: 'readlines'?
    def test_newlines_property(self):
        return super().test_newlines_property()

diff --git a/Lib/test/test_types.py b/Lib/test/test_types.py
@@ -45,7 +45,6 @@ def clear_typing_caches():

class TypesTests(unittest.TestCase):

-    @unittest.skipUnless(c_types, "TODO: RUSTPYTHON; requires _types module")
    def test_names(self):
        c_only_names = {'CapsuleType'}
        ignored = {'new_class', 'resolve_bases', 'prepare_class',
@@ -636,7 +635,7 @@ def test_slot_wrapper_types(self):
        self.assertIsInstance(object.__lt__, types.WrapperDescriptorType)
        self.assertIsInstance(int.__lt__, types.WrapperDescriptorType)

-    @unittest.expectedFailure  # TODO: RUSTPYTHON; No signature found in builtin method __get__ of 'method_descriptor' objects.
    @unittest.skipIf(MISSING_C_DOCSTRINGS,
                     "Signature information for builtins requires docstrings")
    def test_dunder_get_signature(self):
@@ -661,7 +660,7 @@ def test_method_descriptor_types(self):
        self.assertIsInstance(int.from_bytes, types.BuiltinMethodType)
        self.assertIsInstance(int.__new__, types.BuiltinMethodType)

-    @unittest.expectedFailure  # TODO: RUSTPYTHON; ModuleNotFoundError: No module named '_queue'
    def test_method_descriptor_crash(self):
        # gh-132747: The default __get__() implementation in C was unable
        # to handle a second argument of None when called from Python

diff --git a/crates/vm/src/stdlib/_io.rs b/crates/vm/src/stdlib/_io.rs
@@ -789,11 +789,41 @@ mod _io {

    #[pyclass(flags(BASETYPE, HAS_WEAKREF))]
    impl _TextIOBase {
        #[pygetset]
        fn encoding(_zelf: PyObjectRef, vm: &VirtualMachine) -> PyObjectRef {
            vm.ctx.none()
        }

        #[pygetset]
        fn errors(_zelf: PyObjectRef, vm: &VirtualMachine) -> PyObjectRef {
            vm.ctx.none()