diff --git a/packages/browser/src/node/rpc.ts b/packages/browser/src/node/rpc.ts
index cc69e7814..a252a9819 100644
--- a/packages/browser/src/node/rpc.ts
+++ b/packages/browser/src/node/rpc.ts
@@ -32,6 +32,7 @@ import {
   isValidApiRequest,
 } from 'vitest/node'
 import { WebSocketServer } from 'ws'
+import { slash } from './utils'
 
 const debug = createDebugger('vitest:browser:api')
 
@@ -293,7 +294,7 @@ export function setupBrowserRpc(
             for (const attachment of attachments) {
               const path = attachment.path
               if (path && !path.startsWith('http://') && !path.startsWith('https://')) {
-                checkFileAccess(resolve(project.config.root, path))
+                checkFileAccess(resolve(project.config.root, slash(path)))
               }
             }
           }
@@ -304,7 +305,7 @@ export function setupBrowserRpc(
           return vitest._testRun.recordBenchmark(testId, benchmark)
         },
         async readBenchmarkResult(relativePath) {
-          checkFileAccess(project.benchmark.resolve(relativePath))
+          checkFileAccess(project.benchmark.resolve(slash(relativePath)))
           return project.benchmark.readResult(relativePath)
         },
         async writeBenchmarkResult(relativePath, data) {
@@ -314,7 +315,7 @@ export function setupBrowserRpc(
             )
             return
           }
-          checkFileAccess(project.benchmark.resolve(relativePath))
+          checkFileAccess(project.benchmark.resolve(slash(relativePath)))
           return project.benchmark.writeResult(relativePath, data)
         },
         async onTaskUpdate(method, packs, events) {
@@ -479,8 +480,9 @@ export function setupBrowserRpc(
             } else {
               if (module.type === 'redirect') {
                 const redirectUrl = new URL(module.redirect)
-                module.redirect = join(vite.config.root, redirectUrl.pathname)
-                checkFileAccess(module.redirect)
+                const redirect = join(vite.config.root, slash(redirectUrl.pathname))
+                checkFileAccess(redirect)
+                module.redirect = redirect
               }
               defaultMockerRegistry.register(module)
             }
diff --git a/packages/mocker/src/node/interceptorPlugin.ts b/packages/mocker/src/node/interceptorPlugin.ts
index 3319823db..65150373f 100644
--- a/packages/mocker/src/node/interceptorPlugin.ts
+++ b/packages/mocker/src/node/interceptorPlugin.ts
@@ -2,6 +2,7 @@ import type { Plugin } from 'vite'
 import type { MockedModuleSerialized } from '../registry'
 import { readFile } from 'node:fs/promises'
 import { join } from 'node:path/posix'
+import { slash } from '@vitest/utils/helpers'
 import { isFileLoadingAllowed } from 'vite'
 import { ManualMockedModule, MockerRegistry } from '../registry'
 import { cleanUrl, createManualModuleSource } from '../utils'
@@ -24,7 +25,7 @@ export interface InterceptorPluginOptions {
 
 export function interceptorPlugin(options: InterceptorPluginOptions = {}): Plugin {
   const registry = options.registry || new MockerRegistry()
-  return {
+  const plugin: Plugin = {
     name: 'vitest:mocks:interceptor',
     enforce: 'pre',
     load: {
@@ -63,10 +64,10 @@ export function interceptorPlugin(options: InterceptorPluginOptions = {}): Plugi
         }
       },
     },
-    configureServer(server) {
-      if (options.registerWebSocketEvents === false) {
-        return
-      }
+  }
+
+  if (options.registerWebSocketEvents !== false) {
+    plugin.configureServer = (server) => {
       server.ws.on('vitest:interceptor:register', (event: MockedModuleSerialized) => {
         if (event.type === 'manual') {
           const module = ManualMockedModule.fromJSON(event, async () => {
@@ -77,7 +78,7 @@ export function interceptorPlugin(options: InterceptorPluginOptions = {}): Plugi
         } else {
           if (event.type === 'redirect') {
             const redirectUrl = new URL(event.redirect)
-            const redirect = join(server.config.root, redirectUrl.pathname)
+            const redirect = join(server.config.root, slash(redirectUrl.pathname))
             // the redirect is served through the `load` hook below, so it must
             // stay inside the file-serving allowlist and never escape the root
             if (!isFileLoadingAllowed(server.config, redirect)) {
@@ -117,6 +118,8 @@ export function interceptorPlugin(options: InterceptorPluginOptions = {}): Plugi
           )
         })
       }
-    },
+    }
   }
+
+  return plugin
 }
diff --git a/packages/mocker/src/utils.ts b/packages/mocker/src/utils.ts
index 26143ba6f..43bdaa9c1 100644
--- a/packages/mocker/src/utils.ts
+++ b/packages/mocker/src/utils.ts
@@ -9,12 +9,12 @@ export function createManualModuleSource(
   globalAccessor = '"__vitest_mocker__"',
 ): string {
   const source = `
-const __factoryModule__ = await globalThis[${globalAccessor}].getFactoryModule("${moduleUrl}");
+const __factoryModule__ = await globalThis[${globalAccessor}].getFactoryModule(${JSON.stringify(moduleUrl)});
 `
   const keys = exports
     .map((name, index) => {
-      return `let __${index} = __factoryModule__["${name}"]
-export { __${index} as "${name}" }`
+      return `let __${index} = __factoryModule__[${JSON.stringify(name)}]
+export { __${index} as ${JSON.stringify(name)} }`
     })
     .join('\n')
   let code = `${source}\n${keys}`
@@ -24,7 +24,7 @@ if (__factoryModule__.__factoryPromise != null) {
   __factoryModule__.__factoryPromise.then((resolvedModule) => {
     ${exports
       .map((name, index) => {
-        return `__${index} = resolvedModule["${name}"];`
+        return `__${index} = resolvedModule[${JSON.stringify(name)}];`
       })
       .join('\n')}
   })