diff --git a/alternator-test/test_update_expression.py b/alternator-test/test_update_expression.py
index 5a1f4281ac..f99ba4c3eb 100644
--- a/alternator-test/test_update_expression.py
+++ b/alternator-test/test_update_expression.py
@@ -624,7 +624,6 @@ def test_update_expression_unknown_function(test_table_s):
             UpdateExpression='SET a = _f(b,c,d)')
 
 # Test "ADD" operation for numbers
-@pytest.mark.xfail(reason="ADD not yet implemented")
 def test_update_expression_add_numbers(test_table_s):
     p = random_string()
     test_table_s.put_item(Item={'p': p, 'a': 3, 'b': 'hi'})
@@ -648,7 +647,6 @@ def test_update_expression_add_numbers(test_table_s):
             ExpressionAttributeValues={':val1': 1})
 
 # Test "ADD" operation for sets
-@pytest.mark.xfail(reason="ADD not yet implemented")
 def test_update_expression_add_sets(test_table_s):
     p = random_string()
     test_table_s.put_item(Item={'p': p, 'a': set(['dog', 'cat', 'mouse']), 'b': 'hi'})