diff --git a/test/index.js b/test/index.js
index 05787e0..93cd315 100644
--- a/test/index.js
+++ b/test/index.js
@@ -67,7 +67,7 @@ test ('run non-global regex without result', (t) => {
   const data = 'foobarfoo';
   const regex = /baz/u;
   let count = 0;
-  util.run_regex (regex, data, (res) => {
+  util.run_regex (regex, data, () => {
     count++;
   });
   t.is (count, 0);