diff --git a/src/test/run-pass/deriving-default-box.rs b/src/test/run-pass/deriving-default-box.rs
new file mode 100644
index 00000000000..aeef55fbbac
--- /dev/null
+++ b/src/test/run-pass/deriving-default-box.rs
@@ -0,0 +1,22 @@
+// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::default::Default;
+
+#[deriving(Default)]
+struct A {
+    foo: Box<[bool]>,
+}
+
+pub fn main() {
+    let a: A = Default::default();
+    let b: Box<[_]> = box [];
+    assert_eq!(a.foo, b);
+}
diff --git a/src/test/run-pass/deriving-encodable-decodable-box.rs b/src/test/run-pass/deriving-encodable-decodable-box.rs
new file mode 100644
index 00000000000..e21f64cd74c
--- /dev/null
+++ b/src/test/run-pass/deriving-encodable-decodable-box.rs
@@ -0,0 +1,26 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate serialize;
+
+use serialize::{Encodable, Decodable};
+use serialize::json;
+
+#[deriving(Encodable, Decodable)]
+struct A {
+    foo: Box<[bool]>,
+}
+
+fn main() {
+    let obj = A { foo: box [true, false] };
+    let s = json::encode(&obj);
+    let obj2: A = json::decode(s.as_slice()).unwrap();
+    assert!(obj.foo == obj2.foo);
+}