diff --git a/actix-http/src/h1/dispatcher.rs b/actix-http/src/h1/dispatcher.rs
index cca181c9..cf39b823 100644
--- a/actix-http/src/h1/dispatcher.rs
+++ b/actix-http/src/h1/dispatcher.rs
@@ -815,76 +815,21 @@ where
 
 #[cfg(test)]
 mod tests {
-    use std::{cmp, io};
-
-    use actix_codec::{AsyncRead, AsyncWrite};
     use actix_service::IntoService;
-    use bytes::{Buf, Bytes, BytesMut};
     use futures::future::{lazy, ok};
 
     use super::*;
     use crate::error::Error;
     use crate::h1::{ExpectHandler, UpgradeHandler};
-
-    struct Buffer {
-        buf: Bytes,
-        write_buf: BytesMut,
-        err: Option<io::Error>,
-    }
-
-    impl Buffer {
-        fn new(data: &'static str) -> Buffer {
-            Buffer {
-                buf: Bytes::from(data),
-                write_buf: BytesMut::new(),
-                err: None,
-            }
-        }
-    }
-
-    impl AsyncRead for Buffer {}
-    impl io::Read for Buffer {
-        fn read(&mut self, dst: &mut [u8]) -> Result<usize, io::Error> {
-            if self.buf.is_empty() {
-                if self.err.is_some() {
-                    Err(self.err.take().unwrap())
-                } else {
-                    Err(io::Error::new(io::ErrorKind::WouldBlock, ""))
-                }
-            } else {
-                let size = cmp::min(self.buf.len(), dst.len());
-                let b = self.buf.split_to(size);
-                dst[..size].copy_from_slice(&b);
-                Ok(size)
-            }
-        }
-    }
-
-    impl io::Write for Buffer {
-        fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
-            self.write_buf.extend(buf);
-            Ok(buf.len())
-        }
-        fn flush(&mut self) -> io::Result<()> {
-            Ok(())
-        }
-    }
-    impl AsyncWrite for Buffer {
-        fn shutdown(&mut self) -> Poll<(), io::Error> {
-            Ok(Async::Ready(()))
-        }
-        fn write_buf<B: Buf>(&mut self, _: &mut B) -> Poll<usize, io::Error> {
-            Ok(Async::NotReady)
-        }
-    }
+    use crate::test::TestBuffer;
 
     #[test]
     fn test_req_parse_err() {
         let mut sys = actix_rt::System::new("test");
         let _ = sys.block_on(lazy(|| {
-            let buf = Buffer::new("GET /test HTTP/1\r\n\r\n");
+            let buf = TestBuffer::new("GET /test HTTP/1\r\n\r\n");
 
-            let mut h1 = Dispatcher::<_, _, _, _, UpgradeHandler<Buffer>>::new(
+            let mut h1 = Dispatcher::<_, _, _, _, UpgradeHandler<TestBuffer>>::new(
                 buf,
                 ServiceConfig::default(),
                 CloneableService::new(
diff --git a/actix-http/src/test.rs b/actix-http/src/test.rs
index 2c5dc502..3d948ebd 100644
--- a/actix-http/src/test.rs
+++ b/actix-http/src/test.rs
@@ -1,8 +1,11 @@
 //! Test Various helpers for Actix applications to use during testing.
 use std::fmt::Write as FmtWrite;
+use std::io;
 use std::str::FromStr;
 
-use bytes::Bytes;
+use actix_codec::{AsyncRead, AsyncWrite};
+use bytes::{Buf, Bytes, BytesMut};
+use futures::{Async, Poll};
 use http::header::{self, HeaderName, HeaderValue};
 use http::{HttpTryFrom, Method, Uri, Version};
 use percent_encoding::{percent_encode, USERINFO_ENCODE_SET};
@@ -181,3 +184,67 @@ impl TestRequest {
 fn parts(parts: &mut Option<Inner>) -> &mut Inner {
     parts.as_mut().expect("cannot reuse test request builder")
 }
+
+/// Async io buffer
+pub struct TestBuffer {
+    pub read_buf: BytesMut,
+    pub write_buf: BytesMut,
+    pub err: Option<io::Error>,
+}
+
+impl TestBuffer {
+    /// Create new TestBuffer instance
+    pub fn new<T>(data: T) -> TestBuffer
+    where
+        BytesMut: From<T>,
+    {
+        TestBuffer {
+            read_buf: BytesMut::from(data),
+            write_buf: BytesMut::new(),
+            err: None,
+        }
+    }
+
+    /// Add extra data to read buffer.
+    pub fn extend_read_buf<T: AsRef<[u8]>>(&mut self, data: T) {
+        self.read_buf.extend_from_slice(data.as_ref())
+    }
+}
+
+impl io::Read for TestBuffer {
+    fn read(&mut self, dst: &mut [u8]) -> Result<usize, io::Error> {
+        if self.read_buf.is_empty() {
+            if self.err.is_some() {
+                Err(self.err.take().unwrap())
+            } else {
+                Err(io::Error::new(io::ErrorKind::WouldBlock, ""))
+            }
+        } else {
+            let size = std::cmp::min(self.read_buf.len(), dst.len());
+            let b = self.read_buf.split_to(size);
+            dst[..size].copy_from_slice(&b);
+            Ok(size)
+        }
+    }
+}
+
+impl io::Write for TestBuffer {
+    fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
+        self.write_buf.extend(buf);
+        Ok(buf.len())
+    }
+    fn flush(&mut self) -> io::Result<()> {
+        Ok(())
+    }
+}
+
+impl AsyncRead for TestBuffer {}
+
+impl AsyncWrite for TestBuffer {
+    fn shutdown(&mut self) -> Poll<(), io::Error> {
+        Ok(Async::Ready(()))
+    }
+    fn write_buf<B: Buf>(&mut self, _: &mut B) -> Poll<usize, io::Error> {
+        Ok(Async::NotReady)
+    }
+}