diff --git a/vitest.config.ts b/vitest.config.ts
index 16dee32..b88460f 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -5,6 +5,7 @@ export default defineConfig({
   plugins: [sveltekit()],
   test: {
     environment: "jsdom",
+    isolate: true,
     setupFiles: ["./tests/setup.ts"],
     include: ["tests/**/*.{test,spec}.{js,ts}"],
     coverage: {