diff --git a/test/base64.js b/test/base64.js
index ca724a6..b8cc59a 100644
--- a/test/base64.js
+++ b/test/base64.js
@@ -55,7 +55,7 @@ describe ('Base64.js', function() {
   it ('can decode Base64-encoded input', function() {
     for (let i = 0; i < 255; i++) {
       const char = String.fromCharCode(i);
-      assert.strictEqual (atob(btoa (char)), char);
+      assert.strictEqual (atob (btoa(char)), char);
     }
     assert.strictEqual (atob (''), '');
     assert.strictEqual (atob ('Zg=='), 'f');