diff --git a/packages/vitest/src/integrations/browser/server.ts b/packages/vitest/src/integrations/browser/server.ts
index 84a12a8ce157..2485b2fe7479 100644
--- a/packages/vitest/src/integrations/browser/server.ts
+++ b/packages/vitest/src/integrations/browser/server.ts
@@ -39,7 +39,10 @@ export async function createBrowserServer(project: WorkspaceProject, configFile:
           // browser never runs in middleware mode
           server.middlewareMode = false
 
-          config.server = server
+          config.server = {
+            ...config.server,
+            ...server,
+          }
           config.server.fs ??= {}
           config.server.fs.allow = config.server.fs.allow || []
           config.server.fs.allow.push(