diff --git a/packages/docusaurus-theme-live-codeblock/src/__tests__/validateThemeConfig.test.js b/packages/docusaurus-theme-live-codeblock/src/__tests__/validateThemeConfig.test.ts
similarity index 96%
rename from packages/docusaurus-theme-live-codeblock/src/__tests__/validateThemeConfig.test.js
rename to packages/docusaurus-theme-live-codeblock/src/__tests__/validateThemeConfig.test.ts
index ce0fdf040050..0feddebd0f97 100644
--- a/packages/docusaurus-theme-live-codeblock/src/__tests__/validateThemeConfig.test.js
+++ b/packages/docusaurus-theme-live-codeblock/src/__tests__/validateThemeConfig.test.ts
@@ -5,7 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-const {validateThemeConfig, DEFAULT_CONFIG} = require('../validateThemeConfig');
+import {validateThemeConfig, DEFAULT_CONFIG} from '../validateThemeConfig';
 
 function testValidateThemeConfig(themeConfig) {
   function validate(schema, cfg) {