diff --git a/test/index.js b/test/index.js
index a2bee49..a5b7f85 100644
--- a/test/index.js
+++ b/test/index.js
@@ -19,7 +19,7 @@ const config = {
 const mathjax = require('../lib/filter')(config);
 const content = '$E=mc^2$';
 const comment = '<!-- more -->';
-const macros = 'A \vee B \Rarr A';
+const macros = '$A \\vee B \\Rarr A$';
 
 describe('MathJax', () => {
 
@@ -30,4 +30,8 @@ describe('MathJax', () => {
   it('comment', () => {
     mathjax(`${content}\n${comment}\n${content}`).should.include(comment);
   });
+
+  it('macro', () => {
+    mathjax(`${macros}`).should.not.include('fill="red"');
+  });
 });