diff --git a/src/test/run-pass/unreachable-code.rs b/src/test/run-pass/unreachable-code.rs
index 4441ac99a008..a34735c9a69e 100644
--- a/src/test/run-pass/unreachable-code.rs
+++ b/src/test/run-pass/unreachable-code.rs
@@ -1,3 +1,5 @@
+// xfail-pretty
+
 fn id(x: bool) -> bool { x }
 
 fn call_id() {