diff --git a/test/page.js b/test/page.js
index 68c074932..94c1d0a1a 100644
--- a/test/page.js
+++ b/test/page.js
@@ -45,6 +45,10 @@ describe('Page parsing', function() {
         // HRs inserted correctly
         assert.equal(HR_LEXED[0].content.match(/<hr>/g).length, 2);
     });
+
+    it('should detect an exercise\'s language', function() {
+        assert.equal(LEXED[1].lang, 'py');
+    });
 });