diff --git a/src/services/__tests__/prism.test.ts b/src/services/__tests__/prism.test.ts
index 75396c7b..3829290b 100644
--- a/src/services/__tests__/prism.test.ts
+++ b/src/services/__tests__/prism.test.ts
@@ -1,10 +1,6 @@
 import { highlight, mapLang } from '../../utils/highlight';
 
 describe('prism.js helpers', () => {
-  test('mapLang should map "json" to "js"', () => {
-    expect(mapLang('json')).toBe('js');
-  });
-
   test('mapLang should map to "clike" by default', () => {
     expect(mapLang('non-existring')).toBe('clike');
   });