diff --git a/tests/run-pass/intrinsics.rs b/tests/run-pass/intrinsics.rs
index 5666e191fd37..ef7fa0d98613 100755
--- a/tests/run-pass/intrinsics.rs
+++ b/tests/run-pass/intrinsics.rs
@@ -10,4 +10,5 @@ fn main() {
     assert_eq!(size_of_val(&42), 4);
     assert_eq!(size_of_val(&[] as &[i32]), 0);
     assert_eq!(size_of_val(&[1, 2, 3] as &[i32]), 12);
+    assert_eq!(size_of_val("foobar"), 6);
 }