diff --git a/test/browser/fixtures/inspect/vitest.config.ts b/test/browser/fixtures/inspect/vitest.config.ts
index ffb4bea01..44f91bdd5 100644
--- a/test/browser/fixtures/inspect/vitest.config.ts
+++ b/test/browser/fixtures/inspect/vitest.config.ts
@@ -7,7 +7,7 @@ export default defineConfig({
     browser: {
       enabled: true,
       provider: "playwright",
-      name: "chromium",
+      instances: [{ browser: "chromium" }],
       headless: true,
     },
   },
diff --git a/test/browser/fixtures/worker/vitest.config.ts b/test/browser/fixtures/worker/vitest.config.ts
index c3fe79b6a..563c59b40 100644
--- a/test/browser/fixtures/worker/vitest.config.ts
+++ b/test/browser/fixtures/worker/vitest.config.ts
@@ -2,7 +2,7 @@ import { fileURLToPath } from 'node:url'
 import { defineConfig } from 'vitest/config'
 
 const provider = process.env.PROVIDER || 'playwright'
-const name =
+const browser =
   process.env.BROWSER || (provider === 'playwright' ? 'chromium' : 'chrome')
 
 export default defineConfig({
@@ -11,7 +11,7 @@ export default defineConfig({
     browser: {
       enabled: true,
       provider,
-      name,
+      instances: [{ browser }],
     },
   },
 })
diff --git a/test/cli/fixtures/browser-multiple/vitest.workspace.ts b/test/cli/fixtures/browser-multiple/vitest.workspace.ts
index 8ed483f8e..a1d3ec0be 100644
--- a/test/cli/fixtures/browser-multiple/vitest.workspace.ts
+++ b/test/cli/fixtures/browser-multiple/vitest.workspace.ts
@@ -10,7 +10,7 @@ export default defineWorkspace([
       include: ['./basic.test.js'],
       browser: {
         enabled: true,
-        name: 'chromium',
+        instances: [{ browser: 'chromium' }],
         provider: 'playwright',
         headless: true,
       }
@@ -24,7 +24,7 @@ export default defineWorkspace([
       include: ['./basic.test.js'],
       browser: {
         enabled: true,
-        name: 'chromium',
+        instances: [{ browser: 'chromium' }],
         provider: 'playwright',
         headless: true,
       }
diff --git a/test/cli/fixtures/list/vitest.config.ts b/test/cli/fixtures/list/vitest.config.ts
index e64489065..2c6350817 100644
--- a/test/cli/fixtures/list/vitest.config.ts
+++ b/test/cli/fixtures/list/vitest.config.ts
@@ -4,7 +4,7 @@ export default defineConfig({
   test: {
     include: ['basic.test.ts', 'math.test.ts'],
     browser: {
-      name: 'chromium',
+      instances: [{ browser: 'chromium' }],
       provider: 'playwright',
       headless: true,
       api: 7523,
diff --git a/test/cli/test/fails.test.ts b/test/cli/test/fails.test.ts
index 406d5d974..3cd0ec1be 100644
--- a/test/cli/test/fails.test.ts
+++ b/test/cli/test/fails.test.ts
@@ -115,7 +115,7 @@ it('prints a warning if the assertion is not awaited in the browser mode', async
       test: {
         browser: {
           enabled: true,
-          name: 'chromium',
+          instances: [{ browser: 'chromium' }],
           provider: 'playwright',
           headless: true,
         },
diff --git a/test/cli/test/public-api.test.ts b/test/cli/test/public-api.test.ts
index 93de5e5e1..8c0638f3b 100644
--- a/test/cli/test/public-api.test.ts
+++ b/test/cli/test/public-api.test.ts
@@ -12,7 +12,7 @@ it.each([
     browser: {
       enabled: true,
       provider: 'playwright',
-      name: 'chromium',
+      instances: [{ browser: 'chromium' }],
       headless: true,
     },
   },
diff --git a/test/config/test/failures.test.ts b/test/config/test/failures.test.ts
index a2ac65214..f6045df23 100644
--- a/test/config/test/failures.test.ts
+++ b/test/config/test/failures.test.ts
@@ -63,7 +63,7 @@ test('inspect cannot be used with multi-threading', async () => {
 })
 
 test('inspect in browser mode requires no-file-parallelism', async () => {
-  const { stderr } = await runVitest({ inspect: true, browser: { enabled: true, name: 'chromium', provider: 'playwright' } })
+  const { stderr } = await runVitest({ inspect: true, browser: { enabled: true, instances: [{ browser: 'chromium' }], provider: 'playwright' } })
 
   expect(stderr).toMatch('Error: You cannot use --inspect without "--no-file-parallelism", "poolOptions.threads.singleThread" or "poolOptions.forks.singleFork"')
 })
@@ -75,7 +75,7 @@ test('inspect-brk cannot be used with multi processing', async () => {
 })
 
 test('inspect-brk in browser mode requires no-file-parallelism', async () => {
-  const { stderr } = await runVitest({ inspectBrk: true, browser: { enabled: true, name: 'chromium', provider: 'playwright' } })
+  const { stderr } = await runVitest({ inspectBrk: true, browser: { enabled: true, instances: [{ browser: 'chromium' }], provider: 'playwright' } })
 
   expect(stderr).toMatch('Error: You cannot use --inspect-brk without "--no-file-parallelism", "poolOptions.threads.singleThread" or "poolOptions.forks.singleFork"')
 })
diff --git a/test/coverage-test/utils.ts b/test/coverage-test/utils.ts
index 0486120b9..863dbca6b 100644
--- a/test/coverage-test/utils.ts
+++ b/test/coverage-test/utils.ts
@@ -49,7 +49,7 @@ export async function runVitest(config: UserConfig, options = { throwOnError: tr
     browser: {
       enabled: process.env.COVERAGE_BROWSER === 'true',
       headless: true,
-      name: 'chromium',
+      instances: [{ browser: 'chromium' }],
       provider: 'playwright',
       ...config.browser,
     },
diff --git a/test/watch/test/config-watching.test.ts b/test/watch/test/config-watching.test.ts
index 5f9b1040f..b42934a5f 100644
--- a/test/watch/test/config-watching.test.ts
+++ b/test/watch/test/config-watching.test.ts
@@ -56,7 +56,7 @@ test('rerun stops the previous browser server and restarts multiple times withou
       test: {
         browser: {
           enabled: true,
-          name: 'chromium',
+          instances: [{ browser: 'chromium' }],
           provider: 'playwright',
           headless: true,
         },
diff --git a/test/watch/test/file-watching.test.ts b/test/watch/test/file-watching.test.ts
index 178eeb5be..74af818c6 100644
--- a/test/watch/test/file-watching.test.ts
+++ b/test/watch/test/file-watching.test.ts
@@ -192,7 +192,7 @@ describe('browser', () => {
     const { vitest } = await testUtils.runVitest({
       ...options,
       browser: {
-        name: 'chrome',
+        instances: [{ browser: 'chromium' }],
         provider: 'webdriverio',
         enabled: true,
         headless: true,
diff --git a/test/workspaces-browser/space_browser/vitest.config.ts b/test/workspaces-browser/space_browser/vitest.config.ts
index 9ef18935b..5b64428f2 100644
--- a/test/workspaces-browser/space_browser/vitest.config.ts
+++ b/test/workspaces-browser/space_browser/vitest.config.ts
@@ -4,7 +4,7 @@ export default defineProject({
   test: {
     browser: {
       enabled: true,
-      name: process.env.BROWSER || 'chromium',
+      instances: [{ browser: process.env.BROWSER || 'chromium' }],
       headless: true,
       provider: process.env.PROVIDER || 'playwright',
     },
diff --git a/test/workspaces-browser/vitest.workspace.ts b/test/workspaces-browser/vitest.workspace.ts
index f42cf2b12..f7736c2b3 100644
--- a/test/workspaces-browser/vitest.workspace.ts
+++ b/test/workspaces-browser/vitest.workspace.ts
@@ -8,7 +8,7 @@ export default defineWorkspace([
       root: './space_browser_inline',
       browser: {
         enabled: true,
-        name: process.env.BROWSER || 'chromium',
+        instances: [{ browser: process.env.BROWSER || 'chromium' }],
         headless: true,
         provider: process.env.PROVIDER || 'playwright',
       },