fix tests

package.json

@@ -16,7 +16,7 @@
     "docs": "npx quartz build --serve -d docs",
     "check": "tsc --noEmit && npx prettier . --check",
     "format": "npx prettier . --write",
-    "test": "for f in $(find ./quartz -name '*.test.ts'); do tsx $f; done",
+    "test": "tsx --test \"./quartz/**/*.test.ts\"",
     "profile": "0x -D prof ./quartz/bootstrap-cli.mjs build --concurrency=1"
   },
   "engines": {