diff --git a/test/bench/perf.js b/test/bench/perf.js
index 32bb29e9..65ec8455 100644
--- a/test/bench/perf.js
+++ b/test/bench/perf.js
@@ -260,6 +260,9 @@ async.series({
           .then(function (buffer) {
             assert.notStrictEqual(null, buffer);
             deferred.resolve();
+          })
+          .catch(function (err) {
+            throw err;
           });
       }
     }).on('cycle', function (event) {