diff --git a/zrml/swaps/src/tests.rs b/zrml/swaps/src/tests.rs
index c2644f9a6..413421e7c 100644
--- a/zrml/swaps/src/tests.rs
+++ b/zrml/swaps/src/tests.rs
@@ -568,6 +568,11 @@ fn pool_amount_must_not_be_zero() {
             Swaps::pool_exit(alice_signed(), 0, 0, vec!(_1, _1, _1, _1)),
             crate::Error::<Runtime>::MathApproximation
         );
+
+        assert_noop!(
+            Swaps::pool_join_with_exact_pool_amount(alice_signed(), 0, ASSET_A, 0, 0,),
+            crate::Error::<Runtime>::MathApproximation
+        );
     });
 }