diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 3e51977f1..78e0283a8 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -512,7 +512,6 @@ class TestSet(TestJointOps, unittest.TestCase):
         for c in (self.word + self.otherword):
             self.assertIn(c, self.s)
 
-    @unittest.skip("TODO: RUSTPYTHON")
     def test_intersection_update(self):
         retval = self.s.intersection_update(self.otherword)
         self.assertEqual(retval, None)
diff --git a/vm/src/obj/objset.rs b/vm/src/obj/objset.rs
index b68c459b7..e4d72a5f4 100644
--- a/vm/src/obj/objset.rs
+++ b/vm/src/obj/objset.rs
@@ -298,7 +298,7 @@ impl PySetInner {
         others: Args<PyIterable>,
         vm: &VirtualMachine,
     ) -> PyResult<()> {
-        let temp_inner = self.copy();
+        let mut temp_inner = self.copy();
         self.clear();
         for iterable in others {
             for item in iterable.iter(vm)? {
@@ -307,6 +307,7 @@ impl PySetInner {
                     self.add(&obj, vm)?;
                 }
             }
+            temp_inner = self.copy()
         }
         Ok(())
     }