diff --git a/Lib/test/test_extcall.py b/Lib/test/test_extcall.py
index d9d85fe79..483d5ad5f 100644
--- a/Lib/test/test_extcall.py
+++ b/Lib/test/test_extcall.py
@@ -442,7 +442,7 @@ TypeError if te dictionary is not empty
     ...     False
     True
 
-    >>> id(1, **{'foo': 1})
+    >>> id(1, **{'foo': 1}) # TODO: RUSTPYTHON # doctest:+EXPECTED_FAILURE
     Traceback (most recent call last):
       ...
     TypeError: id() takes no keyword arguments
@@ -545,8 +545,15 @@ Same with keyword only args:
 import doctest
 import unittest
 
+EXPECTED_FAILURE = doctest.register_optionflag('EXPECTED_FAILURE') # TODO: RUSTPYTHON
+class CustomOutputChecker(doctest.OutputChecker): # TODO: RUSTPYTHON
+    def check_output(self, want, got, optionflags): # TODO: RUSTPYTHON
+        if optionflags & EXPECTED_FAILURE: # TODO: RUSTPYTHON
+            return not super().check_output(want, got, optionflags) # TODO: RUSTPYTHON
+        return super().check_output(want, got, optionflags) # TODO: RUSTPYTHON
+
 def load_tests(loader, tests, pattern):
-    tests.addTest(doctest.DocTestSuite())
+    tests.addTest(doctest.DocTestSuite(checker=CustomOutputChecker())) # TODO: RUSTPYTHON
     return tests
 
 
diff --git a/Lib/test/test_unpack_ex.py b/Lib/test/test_unpack_ex.py
index 9e2d54bd3..d84befd9c 100644
--- a/Lib/test/test_unpack_ex.py
+++ b/Lib/test/test_unpack_ex.py
@@ -148,27 +148,27 @@ List comprehension element unpacking
     [0, 1, 2, 3, 4]
 
     >>> l = [a, (3, 4), {5}, {6: None}, (i for i in range(7, 10))]
-    >>> [*item for item in l]
+    >>> [*item for item in l] # TODO: RUSTPYTHON # doctest:+EXPECTED_FAILURE
     Traceback (most recent call last):
     ...
     SyntaxError: iterable unpacking cannot be used in comprehension
 
-    >>> [*[0, 1] for i in range(10)]
+    >>> [*[0, 1] for i in range(10)] # TODO: RUSTPYTHON # doctest:+EXPECTED_FAILURE
     Traceback (most recent call last):
     ...
     SyntaxError: iterable unpacking cannot be used in comprehension
 
-    >>> [*'a' for i in range(10)]
+    >>> [*'a' for i in range(10)] # TODO: RUSTPYTHON # doctest:+EXPECTED_FAILURE
     Traceback (most recent call last):
     ...
     SyntaxError: iterable unpacking cannot be used in comprehension
 
-    >>> [*[] for i in range(10)]
+    >>> [*[] for i in range(10)] # TODO: RUSTPYTHON # doctest:+EXPECTED_FAILURE
     Traceback (most recent call last):
     ...
     SyntaxError: iterable unpacking cannot be used in comprehension
 
-    >>> {**{} for a in [1]}
+    >>> {**{} for a in [1]} # TODO: RUSTPYTHON # doctest:+EXPECTED_FAILURE
     Traceback (most recent call last):
     ...
     SyntaxError: dict unpacking cannot be used in dict comprehension
@@ -356,27 +356,27 @@ Now some general starred expressions (all fail).
       ...
     SyntaxError: can't use starred expression here
 
-    >>> (*x),y = 1, 2 # doctest:+ELLIPSIS
+    >>> (*x),y = 1, 2 # TODO: RUSTPYTHON # doctest:+ELLIPSIS +EXPECTED_FAILURE
     Traceback (most recent call last):
       ...
     SyntaxError: cannot use starred expression here
 
-    >>> (((*x))),y = 1, 2 # doctest:+ELLIPSIS
+    >>> (((*x))),y = 1, 2 # TODO: RUSTPYTHON # doctest:+ELLIPSIS +EXPECTED_FAILURE
     Traceback (most recent call last):
       ...
     SyntaxError: cannot use starred expression here
 
-    >>> z,(*x),y = 1, 2, 4 # doctest:+ELLIPSIS
+    >>> z,(*x),y = 1, 2, 4 # TODO: RUSTPYTHON # doctest:+ELLIPSIS +EXPECTED_FAILURE
     Traceback (most recent call last):
       ...
     SyntaxError: cannot use starred expression here
 
-    >>> z,(*x) = 1, 2 # doctest:+ELLIPSIS
+    >>> z,(*x) = 1, 2 # TODO: RUSTPYTHON # doctest:+ELLIPSIS +EXPECTED_FAILURE
     Traceback (most recent call last):
       ...
     SyntaxError: cannot use starred expression here
 
-    >>> ((*x),y) = 1, 2 # doctest:+ELLIPSIS
+    >>> ((*x),y) = 1, 2 # TODO: RUSTPYTHON # doctest:+ELLIPSIS +EXPECTED_FAILURE
     Traceback (most recent call last):
       ...
     SyntaxError: cannot use starred expression here
@@ -402,8 +402,15 @@ Some size constraints (all fail.)
 
 __test__ = {'doctests' : doctests}
 
+EXPECTED_FAILURE = doctest.register_optionflag('EXPECTED_FAILURE') # TODO: RUSTPYTHON
+class CustomOutputChecker(doctest.OutputChecker): # TODO: RUSTPYTHON
+    def check_output(self, want, got, optionflags): # TODO: RUSTPYTHON
+        if optionflags & EXPECTED_FAILURE: # TODO: RUSTPYTHON
+            return not super().check_output(want, got, optionflags) # TODO: RUSTPYTHON
+        return super().check_output(want, got, optionflags) # TODO: RUSTPYTHON
+
 def load_tests(loader, tests, pattern):
-    tests.addTest(doctest.DocTestSuite())
+    tests.addTest(doctest.DocTestSuite(checker=CustomOutputChecker())) # TODO: RUSTPYTHON
     return tests
 
 
diff --git a/crates/codegen/src/compile.rs b/crates/codegen/src/compile.rs
index 26220f415..70ff6d391 100644
--- a/crates/codegen/src/compile.rs
+++ b/crates/codegen/src/compile.rs
@@ -7417,7 +7417,7 @@ impl Compiler {
                 && matches!(arguments.args[0], ast::Expr::Starred(_))
             {
                 // Single starred arg: pass value directly to CallFunctionEx.
-                // Runtime will convert to tuple and check iterability with function name.
+                // Runtime will convert to tuple and validate with function name.
                 if let ast::Expr::Starred(ast::ExprStarred { value, .. }) = &arguments.args[0] {
                     self.compile_expression(value)?;
                 }