diff --git a/packages/worker/src/index.ts b/packages/worker/src/index.ts
index 137aa81..8da337e 100644
--- a/packages/worker/src/index.ts
+++ b/packages/worker/src/index.ts
@@ -87,16 +87,16 @@ export async function initVitest(
     'test',
     cliOptions,
     {
-      server: {
-        middlewareMode: true,
-        watch: null,
-      },
       plugins: [
         {
           name: 'vitest:vscode-extension',
           config(userConfig) {
             userConfig.test ??= {}
 
+            userConfig.server ??= {}
+            userConfig.server.watch = null
+            userConfig.server.middlewareMode = true
+
             const testReporters = toArray(userConfig.test.reporters)
             if (!testReporters.length) {
               testReporters.push(['default', { isTTY: false }])