diff --git a/tests/run-pass/packed_struct.rs b/tests/run-pass/packed_struct.rs
index 93aecbb3d77..5b3f09c0dd0 100644
--- a/tests/run-pass/packed_struct.rs
+++ b/tests/run-pass/packed_struct.rs
@@ -9,6 +9,11 @@ fn main() {
         a: 42,
         b: 99,
     };
-    assert_eq!(x.a, 42);
-    assert_eq!(x.b, 99);
+    let a = x.a;
+    let b = x.b;
+    assert_eq!(a, 42);
+    assert_eq!(b, 99);
+    // can't do `assert_eq!(x.a, 42)`, because `assert_eq!` takes a reference
+    assert_eq!({x.a}, 42);
+    assert_eq!({x.b}, 99);
 }