diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 4284393ca5..060dbfa14a 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -582,8 +582,6 @@ def test_ixor(self):
             else:
                 self.assertNotIn(c, self.s)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_inplace_on_self(self):
         t = self.s.copy()
         t |= t
diff --git a/Lib/test/test_weakset.py b/Lib/test/test_weakset.py
index 566d742a0a..cd8db1a19d 100644
--- a/Lib/test/test_weakset.py
+++ b/Lib/test/test_weakset.py
@@ -317,8 +317,6 @@ def test_ixor(self):
             else:
                 self.assertNotIn(c, self.s)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_inplace_on_self(self):
         t = self.s.copy()
         t |= t
diff --git a/vm/src/builtins/set.rs b/vm/src/builtins/set.rs
index c2ba6781f7..f7886d2eec 100644
--- a/vm/src/builtins/set.rs
+++ b/vm/src/builtins/set.rs
@@ -383,16 +383,15 @@ impl PySetInner {
         others: impl std::iter::Iterator<Item = ArgIterable>,
         vm: &VirtualMachine,
     ) -> PyResult<()> {
-        let mut temp_inner = self.copy();
-        self.clear();
-        for iterable in others {
-            for item in iterable.iter(vm)? {
-                let obj = item?;
-                if temp_inner.contains(&obj, vm)? {
-                    self.add(obj, vm)?;
+        // For each set in other
+        //  remove all elements from LHS (self) that are not in set
+        for other_set_iter in others {
+            let other_set = Self::from_iter(other_set_iter.iter(vm)?, vm)?;
+            for item in self.elements().into_iter() {
+                if !other_set.contains(&item, vm)? {
+                    self.remove(item, vm)?;
                 }
             }
-            temp_inner = self.copy()
         }
         Ok(())
     }
@@ -402,9 +401,14 @@ impl PySetInner {
         others: impl std::iter::Iterator<Item = ArgIterable>,
         vm: &VirtualMachine,
     ) -> PyResult<()> {
-        for iterable in others {
-            for item in iterable.iter(vm)? {
-                self.content.delete_if_exists(vm, &*item?)?;
+        // For each set in other
+        //  remove all elements from LHS (self) that are also in set
+        for other_set_iter in others {
+            let other_set = Self::from_iter(other_set_iter.iter(vm)?, vm)?;
+            for item in self.elements().into_iter() {
+                if other_set.contains(&item, vm)? {
+                    self.remove(item, vm)?;
+                }
             }
         }
         Ok(())