diff --git a/client/src/templates/Challenges/redux/execute-challenge-saga.js b/client/src/templates/Challenges/redux/execute-challenge-saga.js
index 028e84ea90..1b28f64752 100644
--- a/client/src/templates/Challenges/redux/execute-challenge-saga.js
+++ b/client/src/templates/Challenges/redux/execute-challenge-saga.js
@@ -225,10 +225,10 @@ function* previewChallengeSaga({ flushLogs = true } = {}) {
       }
     }
   } catch (err) {
-    if (err === 'timeout') {
+    if (err[0] === 'timeout') {
       // TODO: translate the error
       // eslint-disable-next-line no-ex-assign
-      err = `The code you have written is taking longer than the ${previewTimeout}ms our challenges allow. You may have created an infinite loop or need to write a more efficient algorithm`;
+      err[0] = `The code you have written is taking longer than the ${previewTimeout}ms our challenges allow. You may have created an infinite loop or need to write a more efficient algorithm`;
     }
     console.log(err);
     yield put(updateConsole(escape(err)));