diff --git a/tests/mktemp.rs b/tests/mktemp.rs
index 31f38d941..d765a40d4 100644
--- a/tests/mktemp.rs
+++ b/tests/mktemp.rs
@@ -1,7 +1,6 @@
 extern crate tempdir;
 
 use tempdir::TempDir;
-use std::env::set_var;
 
 #[macro_use]
 mod common;