diff --git a/src/libstd/io/mod.rs b/src/libstd/io/mod.rs
index c329fb3bfa50..d4f30e8a99b9 100644
--- a/src/libstd/io/mod.rs
+++ b/src/libstd/io/mod.rs
@@ -1890,8 +1890,11 @@ mod tests {
     #[test]
     fn chain_bufread() {
         let testdata = b"ABCDEFGHIJKL";
-        let chain1 = (&testdata[..3]).chain(&testdata[3..6]).chain(&testdata[6..9]).chain(&testdata[9..]);
-        let chain2 = (&testdata[..4]).chain(&testdata[4..8]).chain(&testdata[8..]);
+        let chain1 = (&testdata[..3]).chain(&testdata[3..6])
+                                     .chain(&testdata[6..9])
+                                     .chain(&testdata[9..]);
+        let chain2 = (&testdata[..4]).chain(&testdata[4..8])
+                                     .chain(&testdata[8..]);
         cmp_bufread(chain1, chain2, &testdata[..]);
     }