diff --git a/packages/browser/src/node/plugin.ts b/packages/browser/src/node/plugin.ts
index 524fb9bf3307..a80bdfa13554 100644
--- a/packages/browser/src/node/plugin.ts
+++ b/packages/browser/src/node/plugin.ts
@@ -8,7 +8,6 @@ import type { WorkspaceProject } from 'vitest/node'
 import { getFilePoolName, resolveApiServerConfig, resolveFsAllow, distDir as vitestDist } from 'vitest/node'
 import { type Plugin, coverageConfigDefaults } from 'vitest/config'
 import { toArray } from '@vitest/utils'
-import { defaultBrowserPort } from 'vitest/config'
 import { dynamicImportPlugin } from '@vitest/mocker/node'
 import MagicString from 'magic-string'
 import BrowserContext from './plugins/pluginContext'
@@ -329,14 +328,16 @@ export default (browserServer: BrowserServer, base = '/'): Plugin[] => {
           viteConfig.esbuild.legalComments = 'inline'
         }
 
+        const defaultPort = project.ctx._browserLastPort++
+
         const api = resolveApiServerConfig(
           viteConfig.test?.browser || {},
-          defaultBrowserPort,
+          defaultPort,
         )
 
         viteConfig.server = {
           ...viteConfig.server,
-          port: defaultBrowserPort,
+          port: defaultPort,
           ...api,
           middlewareMode: false,
           open: false,
diff --git a/packages/vitest/src/node/core.ts b/packages/vitest/src/node/core.ts
index efa2f74db554..745335ad30b2 100644
--- a/packages/vitest/src/node/core.ts
+++ b/packages/vitest/src/node/core.ts
@@ -12,7 +12,7 @@ import { noop, slash, toArray } from '@vitest/utils'
 import { getTasks, hasFailed } from '@vitest/runner/utils'
 import { version } from '../../package.json' with { type: 'json' }
 import { getCoverageProvider } from '../integrations/coverage'
-import { workspacesFiles as workspaceFiles } from '../constants'
+import { defaultBrowserPort, workspacesFiles as workspaceFiles } from '../constants'
 import { WebSocketReporter } from '../api/setup'
 import type { SerializedCoverageConfig } from '../runtime/config'
 import type { ArgumentsType, OnServerRestartHandler, ProvidedContext, UserConsoleLog } from '../types/general'
@@ -87,6 +87,9 @@ export class Vitest {
   /** @deprecated use `_cachedSpecs` */
   projectTestFiles = this._cachedSpecs
 
+  /** @private */
+  public _browserLastPort = defaultBrowserPort
+
   constructor(
     public readonly mode: VitestRunMode,
     options: VitestOptions = {},