diff --git a/src/movielibrary_test.rs b/src/movielibrary_test.rs
index 757615d..c6edb4f 100644
--- a/src/movielibrary_test.rs
+++ b/src/movielibrary_test.rs
@@ -211,8 +211,9 @@ fn test_roundtrip_library() -> Result<(), Box<dyn Error>> {
 fn validate_duplicates(got: Vec<(&Movie, Vec<&Movie>)>, want: Vec<(Movie, Vec<Movie>)>) {
     assert_eq!(got.len(), want.len());
     for (g, w) in got.iter().zip(&want) {
-        assert_eq!(g.0, &w.0);
-        assert_eq!(g.1, w.1.iter().map(|v| v).collect::<Vec<_>>());
+        assert_eq!(g.0, &w.0, "Got:\n{:?}\nWant:\n{:?}", g, w);
+        let want = w.1.iter().map(|v| v).collect::<Vec<_>>();
+        assert_eq!(g.1, want, "Got:\n{:?}\nWant:\n{:?}", g, w);
     }
 }