diff --git a/spec/api-app-spec.js b/spec/api-app-spec.js
index c95de0fb0992..f1e1b1b5a7cd 100644
--- a/spec/api-app-spec.js
+++ b/spec/api-app-spec.js
@@ -342,7 +342,7 @@ describe('app module', function () {
 
   describe('isAccessibilitySupportEnabled API', function () {
     it('returns whether the Chrome has accessibility APIs enabled', function () {
-      assert.equal(app.isAccessibilitySupportEnabled(), 'boolean')
+      assert.equal(typeof app.isAccessibilitySupportEnabled(), 'boolean')
     })
   })
 })