diff --git a/src/test/run-pass/deep-vector.rs b/src/test/run-pass/deep-vector.rs
index bd89840befc..7952bf84f77 100644
--- a/src/test/run-pass/deep-vector.rs
+++ b/src/test/run-pass/deep-vector.rs
@@ -1,5 +1,5 @@
 fn main() {
-    let x = [
+    let _x = [
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,