diff --git a/Lib/test/test_dataclasses.py b/Lib/test/test_dataclasses.py
index 74e47c8117..6bd9d37fad 100644
--- a/Lib/test/test_dataclasses.py
+++ b/Lib/test/test_dataclasses.py
@@ -1954,8 +1954,6 @@ class R:
                     self.assertEqual(new_sample.x, another_new_sample.x)
                     self.assertEqual(sample.y, another_new_sample.y)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_dataclasses_qualnames(self):
         @dataclass(order=True, unsafe_hash=True, frozen=True)
         class A:
@@ -3442,8 +3440,6 @@ class C:
         self.assertEqual(c1.x, 3)
         self.assertEqual(c1.y, 2)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_frozen(self):
         @dataclass(frozen=True)
         class C:
@@ -3476,8 +3472,6 @@ class C:
                                              "keyword argument 'a'"):
             c1 = replace(c, x=20, a=5)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_invalid_field_name(self):
         @dataclass(frozen=True)
         class C:
@@ -3521,8 +3515,6 @@ class C:
         with self.assertRaisesRegex(ValueError, 'init=False'):
             replace(c, y=30)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_classvar(self):
         @dataclass
         class C:
diff --git a/vm/src/builtins/function.rs b/vm/src/builtins/function.rs
index 3ad2ec6f5c..8808eae987 100644
--- a/vm/src/builtins/function.rs
+++ b/vm/src/builtins/function.rs
@@ -101,7 +101,9 @@ impl PyFunction {
             if nargs > nexpected_args {
                 return Err(vm.new_type_error(format!(
                     "{}() takes {} positional arguments but {} were given",
-                    &self.code.obj_name, nexpected_args, nargs
+                    self.qualname(),
+                    nexpected_args,
+                    nargs
                 )));
             }
         }
@@ -132,9 +134,11 @@ impl PyFunction {
             if let Some(pos) = argpos(code.posonlyarg_count..total_args, &name) {
                 let slot = &mut fastlocals[pos];
                 if slot.is_some() {
-                    return Err(
-                        vm.new_type_error(format!("Got multiple values for argument '{name}'"))
-                    );
+                    return Err(vm.new_type_error(format!(
+                        "{}() got multiple values for argument '{}'",
+                        self.qualname(),
+                        name
+                    )));
                 }
                 *slot = Some(value);
             } else if let Some(kwargs) = kwargs.as_ref() {
@@ -142,15 +146,17 @@ impl PyFunction {
             } else if argpos(0..code.posonlyarg_count, &name).is_some() {
                 posonly_passed_as_kwarg.push(name);
             } else {
-                return Err(
-                    vm.new_type_error(format!("got an unexpected keyword argument '{name}'"))
-                );
+                return Err(vm.new_type_error(format!(
+                    "{}() got an unexpected keyword argument '{}'",
+                    self.qualname(),
+                    name
+                )));
             }
         }
         if !posonly_passed_as_kwarg.is_empty() {
             return Err(vm.new_type_error(format!(
                 "{}() got some positional-only arguments passed as keyword arguments: '{}'",
-                &self.code.obj_name,
+                self.qualname(),
                 posonly_passed_as_kwarg.into_iter().format(", "),
             )));
         }
@@ -207,7 +213,7 @@ impl PyFunction {
 
                 return Err(vm.new_type_error(format!(
                     "{}() missing {} required positional argument{}: '{}{}{}'",
-                    &self.code.obj_name,
+                    self.qualname(),
                     missing_args_len,
                     if missing_args_len == 1 { "" } else { "s" },
                     missing.iter().join("', '"),