diff --git a/src/rlp/untrusted_rlp.rs b/src/rlp/untrusted_rlp.rs
index a5ee7990e..2bf33ba68 100644
--- a/src/rlp/untrusted_rlp.rs
+++ b/src/rlp/untrusted_rlp.rs
@@ -436,6 +436,6 @@ fn test_rlp_display() {
 	use rustc_serialize::hex::FromHex;
 	let data = "f84d0589010efbef67941f79b2a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470".from_hex().unwrap();
 	let rlp = UntrustedRlp::new(&data);
-	println!("{}", rlp);
+	assert_eq!(format!("{}", rlp), "[\"0x05\", \"0x010efbef67941f79b2\", \"0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421\", \"0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470\"]");
 }