fix legacy tests

Author: philipp-spiess

package.json

@@ -46,7 +46,8 @@
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "tailwindcss": "^4",
-    "@tailwindcss/postcss": "^4"
+    "@tailwindcss/postcss": "^4",
+    "tailwindcss@3": "npm:[email protected]"
   },
   "dependencies": {
     "lodash.castarray": "^4.4.0",