ran npm run tdd

test/shuffle/shuffle.js

@@ -1,8 +1,9 @@
-module.exports = shuffle = ([...arr]) => {
+const shuffle = ([...arr]) => {
 let m = arr.length;
 while (m) {
 const i = Math.floor(Math.random() * m--);
 [arr[m], arr[i]] = [arr[i], arr[m]];
 }
 return arr;
-};
+};
+ module.exports = shuffle