diff --git a/src/client/request.rs b/src/client/request.rs
index 9862aeae66..2bd150a523 100644
--- a/src/client/request.rs
+++ b/src/client/request.rs
@@ -30,6 +30,9 @@ pub struct Request<W> {
     _marker: PhantomData<W>,
 }
 
+//FIXME: remove once https://github.com/rust-lang/issues/22629 is fixed
+unsafe impl<W> Send for Request<W> {}
+
 impl<W> Request<W> {
     /// Read the Request headers.
     #[inline]
diff --git a/src/client/response.rs b/src/client/response.rs
index 5ded928ef3..dbff0bbbc7 100644
--- a/src/client/response.rs
+++ b/src/client/response.rs
@@ -28,6 +28,9 @@ pub struct Response<S = HttpStream> {
     _marker: PhantomData<S>,
 }
 
+//FIXME: remove once https://github.com/rust-lang/issues/22629 is fixed
+unsafe impl<S: Send> Send for Response<S> {}
+
 impl Response {
 
     /// Creates a new response from a server.
diff --git a/src/header/mod.rs b/src/header/mod.rs
index b846a568d9..a59538cde6 100644
--- a/src/header/mod.rs
+++ b/src/header/mod.rs
@@ -531,12 +531,9 @@ impl<'a, H: HeaderFormat> fmt::Debug for HeaderFormatter<'a, H> {
 mod tests {
     use std::old_io::MemReader;
     use std::fmt;
-    use std::borrow::Cow::Borrowed;
-    use std::hash::{SipHasher, hash};
     use mime::Mime;
     use mime::TopLevel::Text;
     use mime::SubLevel::Plain;
-    use unicase::UniCase;
     use super::{Headers, Header, HeaderFormat, ContentLength, ContentType,
                 Accept, Host, QualityItem};
 
@@ -546,15 +543,6 @@ mod tests {
         MemReader::new(s.as_bytes().to_vec())
     }
 
-    #[test]
-    fn test_case_insensitive() {
-        let a = UniCase(Borrowed("foobar"));
-        let b = UniCase(Borrowed("FOOBAR"));
-
-        assert_eq!(a, b);
-        assert_eq!(hash::<_, SipHasher>(&a), hash::<_, SipHasher>(&b));
-    }
-
     #[test]
     fn test_from_raw() {
         let headers = Headers::from_raw(&mut mem("Content-Length: 10\r\n\r\n")).unwrap();
diff --git a/src/lib.rs b/src/lib.rs
index cc71b61108..9a651fcc12 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![feature(core, collections, hash, io, old_io, os, old_path,
+#![feature(core, collections, io, old_io, os, old_path,
            std_misc, box_syntax, unsafe_destructor)]
 #![deny(missing_docs)]
 #![cfg_attr(test, deny(warnings))]