diff --git a/.travis.yml b/.travis.yml
index 857d16f622..5475915c40 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,6 +17,7 @@ cache:
         - target/debug/build
 
 script:
+  - ./.travis/readme.py
   - cargo build --verbose $FEATURES
   - cargo test --verbose $FEATURES
   - 'if [ $TRAVIS_RUST_VERSION = nightly ]; then cargo bench --no-run; fi'
diff --git a/.travis/readme.py b/.travis/readme.py
new file mode 100755
index 0000000000..d1cf57bede
--- /dev/null
+++ b/.travis/readme.py
@@ -0,0 +1,10 @@
+#!/usr/bin/env python
+
+import re
+
+f = open('README.md', 'r')
+raw = f.read()
+
+for (i, code) in enumerate(re.findall(r'```rust([^`]*)```', raw, re.M)):
+    with open('examples/readme_%s.rs' % i, 'w') as f:
+        f.write('#![deny(warnings)]%s' % code)
diff --git a/README.md b/README.md
index d76fb7bc18..6c9e977b05 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ use hyper::header::Connection;
 
 fn main() {
     // Create a client.
-    let mut client = Client::new();
+    let client = Client::new();
 
     // Creating an outgoing request.
     let mut res = client.get("http://rust-lang.org/")