diff --git a/exercises/practice/doubly-linked-list/tests/step_4_leak_test_2.rs b/exercises/practice/doubly-linked-list/tests/step_4_leak_test_2.rs
index 12bbe0848..46687d8b7 100644
--- a/exercises/practice/doubly-linked-list/tests/step_4_leak_test_2.rs
+++ b/exercises/practice/doubly-linked-list/tests/step_4_leak_test_2.rs
@@ -19,8 +19,7 @@ fn drop_no_leaks() {
     drop(list);
 
     let allocated_after = ALLOCATED.load(SeqCst);
-    let leaked_bytes = allocated_before - allocated_after;
-    assert!(leaked_bytes == 0);
+    assert_eq!(allocated_before, allocated_after);
 }
 
 // Defines a wrapper around the global allocator that counts allocations