diff --git a/packages/ember-console/lib/index.js b/packages/ember-console/lib/index.js
index 8f8e596f4f3..fa3f5848579 100644
--- a/packages/ember-console/lib/index.js
+++ b/packages/ember-console/lib/index.js
@@ -29,7 +29,7 @@ function assertPolyfill(test, message) {
   if (!test) {
     try {
       // attempt to preserve the stack
-      throw new Error('assertion failed: ' + message);
+      throw new Error(`assertion failed: ${message}`);
     } catch (error) {
       setTimeout(() => {
         throw error;