1 files changed, 3 insertions, 9 deletions
diff --git a/src/compiletest/common.rs b/src/compiletest/common.rs
index c29f74d7418..8de8d9ce741 100644
--- a/src/compiletest/common.rs
+++ b/src/compiletest/common.rs
@@ -13,7 +13,7 @@ use std::fmt;
 use std::str::FromStr;
 use regex::Regex;
 
-#[derive(Clone, PartialEq)]
+#[derive(Clone, PartialEq, Debug)]
 pub enum Mode {
     CompileFail,
     RunFail,
@@ -43,9 +43,9 @@ impl FromStr for Mode {
     }
 }
 
-impl fmt::String for Mode {
+impl fmt::Display for Mode {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::String::fmt(match *self {
+        fmt::Display::fmt(match *self {
             CompileFail => "compile-fail",
             RunFail => "run-fail",
             RunPass => "run-pass",
@@ -58,12 +58,6 @@ impl fmt::String for Mode {
     }
 }
 
-impl fmt::Show for Mode {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        fmt::String::fmt(self, f)
-    }
-}
-
 #[derive(Clone)]
 pub struct Config {
     // The library paths required for running the compiler