diff --git a/Lib/test/test_userstring.py b/Lib/test/test_userstring.py
index 4d1d8b6b6..b6c11cc4e 100644
--- a/Lib/test/test_userstring.py
+++ b/Lib/test/test_userstring.py
@@ -14,6 +14,16 @@ class UserStringTest(
 
     type2test = UserString
 
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
+    def test_removeprefix(self):
+        super().test_removeprefix()
+
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
+    def test_removesuffix(self):
+        super().test_removesuffix()
+
     # Overwrite the three testing methods, because UserString
     # can't cope with arguments propagated to UserString
     # (and we don't test with subclasses)
@@ -51,6 +61,8 @@ class UserStringTest(
         str3 = ustr3('TEST')
         self.assertEqual(fmt2 % str3, 'value is TEST')
 
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
     def test_encode_default_args(self):
         self.checkequal(b'hello', 'hello', 'encode')
         # Check that encoding defaults to utf-8
@@ -58,6 +70,8 @@ class UserStringTest(
         # Check that errors defaults to 'strict'
         self.checkraises(UnicodeError, '\ud800', 'encode')
 
+    # TODO: RUSTPYTHON
+    @unittest.expectedFailure
     def test_encode_explicit_none_args(self):
         self.checkequal(b'hello', 'hello', 'encode', None, None)
         # Check that encoding defaults to utf-8