diff --git a/packages/ckeditor5-package-generator/lib/templates/js-legacy/vitest.config.ts.txt b/packages/ckeditor5-package-generator/lib/templates/js-legacy/vitest.config.js.txt
similarity index 100%
rename from packages/ckeditor5-package-generator/lib/templates/js-legacy/vitest.config.ts.txt
rename to packages/ckeditor5-package-generator/lib/templates/js-legacy/vitest.config.js.txt
diff --git a/packages/ckeditor5-package-generator/lib/templates/js/vitest.config.ts.txt b/packages/ckeditor5-package-generator/lib/templates/js/vitest.config.js.txt
similarity index 100%
rename from packages/ckeditor5-package-generator/lib/templates/js/vitest.config.ts.txt
rename to packages/ckeditor5-package-generator/lib/templates/js/vitest.config.js.txt