diff --git a/src/doc/trpl/documentation.md b/src/doc/trpl/documentation.md
index 191a51dffdbf..b3f79f2f1df9 100644
--- a/src/doc/trpl/documentation.md
+++ b/src/doc/trpl/documentation.md
@@ -385,17 +385,17 @@ error handling. Lets say you want the following,
 The problem is that `try!` returns a `Result<T, E>` and test functions
 don't return anything so this will give a mismatched types error.
 
-```rust
+```rust,ignore
 /// A doc test using try!
 ///
 /// ```
 /// use std::io;
-/// # fn f() -> io::Result<()> {
+/// # fn foo() -> io::Result<()> {
 /// let mut input = String::new(); 
 /// try!(io::stdin().read_line(&mut input));
 /// # Ok(())
 /// # }
-/// # f();
+/// # foo();
 /// ```
 ```