diff --git a/package.json b/package.json
index 8271c9cec..f8839c0a9 100644
--- a/package.json
+++ b/package.json
@@ -19,8 +19,8 @@
     "test:benchmark": "cd ./tests && pnpm run test:benchmark",
     "test:e2e": "pnpm run build:examples && cd tests && pnpm run test:e2e",
     "test:ecosystem-ci": "pnpm run test:unit && cross-env ECO_CI=1 pnpm run test:integration && pnpm run test:e2e",
-    "test:integration": "pnpm -r --filter \"./tests\" run test",
-    "test:unit": "pnpm -r --filter \"./packages/**\" run test",
+    "test:integration": "rstest run --project integration",
+    "test:unit": "rstest run --project unit*",
     "testu": "pnpm run test:unit -u && pnpm run test:integration -u",
     "type-check": "pnpm -r run type-check",
     "update:rsbuild": "npx taze minor --include /rsbuild/ -w -r -l",
@@ -44,7 +44,7 @@
     "@biomejs/biome": "^2.2.2",
     "@changesets/cli": "^2.29.6",
     "@rslint/core": "^0.1.12",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@types/fs-extra": "^11.0.4",
     "@types/node": "^22.18.0",
     "check-dependency-version-consistency": "^5.0.1",
diff --git a/packages/core/rstest.config.ts b/packages/core/rstest.config.ts
index cd7e33c6a..6c5bb2e99 100644
--- a/packages/core/rstest.config.ts
+++ b/packages/core/rstest.config.ts
@@ -1,5 +1,5 @@
 import { defineConfig } from '@rstest/core';
-import { shared } from '../../rstest.workspace';
+import { shared } from '../../rstest.config';
 
 export default defineConfig({
   ...shared,
diff --git a/packages/core/tests/config.test.ts b/packages/core/tests/config.test.ts
index eef1ecb65..91f166d74 100644
--- a/packages/core/tests/config.test.ts
+++ b/packages/core/tests/config.test.ts
@@ -189,6 +189,7 @@ describe('Should compose create Rsbuild config correctly', () => {
       source: {
         preEntry: './a.js',
       },
+      root: join(__dirname, '..'),
       resolve: {
         alias: {
           foo: 'foo',
diff --git a/packages/create-rslib/fragments/tools/rstest-node-js/package.json b/packages/create-rslib/fragments/tools/rstest-node-js/package.json
index af85761d3..d0a99f9e6 100644
--- a/packages/create-rslib/fragments/tools/rstest-node-js/package.json
+++ b/packages/create-rslib/fragments/tools/rstest-node-js/package.json
@@ -3,6 +3,6 @@
     "test": "rstest"
   },
   "devDependencies": {
-    "@rstest/core": "^0.3.0"
+    "@rstest/core": "^0.3.1"
   }
 }
diff --git a/packages/create-rslib/fragments/tools/rstest-node-ts/package.json b/packages/create-rslib/fragments/tools/rstest-node-ts/package.json
index af85761d3..d0a99f9e6 100644
--- a/packages/create-rslib/fragments/tools/rstest-node-ts/package.json
+++ b/packages/create-rslib/fragments/tools/rstest-node-ts/package.json
@@ -3,6 +3,6 @@
     "test": "rstest"
   },
   "devDependencies": {
-    "@rstest/core": "^0.3.0"
+    "@rstest/core": "^0.3.1"
   }
 }
diff --git a/packages/create-rslib/fragments/tools/rstest-react-js/package.json b/packages/create-rslib/fragments/tools/rstest-react-js/package.json
index e16ffd5da..0bf77d903 100644
--- a/packages/create-rslib/fragments/tools/rstest-react-js/package.json
+++ b/packages/create-rslib/fragments/tools/rstest-react-js/package.json
@@ -3,7 +3,7 @@
     "test": "rstest"
   },
   "devDependencies": {
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/react": "^16.3.0",
     "jsdom": "^26.1.0"
diff --git a/packages/create-rslib/fragments/tools/rstest-react-ts/package.json b/packages/create-rslib/fragments/tools/rstest-react-ts/package.json
index e16ffd5da..0bf77d903 100644
--- a/packages/create-rslib/fragments/tools/rstest-react-ts/package.json
+++ b/packages/create-rslib/fragments/tools/rstest-react-ts/package.json
@@ -3,7 +3,7 @@
     "test": "rstest"
   },
   "devDependencies": {
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/react": "^16.3.0",
     "jsdom": "^26.1.0"
diff --git a/packages/create-rslib/fragments/tools/rstest-vue-js/package.json b/packages/create-rslib/fragments/tools/rstest-vue-js/package.json
index f4daf2ec1..ca331d3a2 100644
--- a/packages/create-rslib/fragments/tools/rstest-vue-js/package.json
+++ b/packages/create-rslib/fragments/tools/rstest-vue-js/package.json
@@ -3,7 +3,7 @@
     "test": "rstest"
   },
   "devDependencies": {
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/vue": "^8.1.0",
     "@vue/test-utils": "^2.4.6",
diff --git a/packages/create-rslib/fragments/tools/rstest-vue-ts/package.json b/packages/create-rslib/fragments/tools/rstest-vue-ts/package.json
index f4daf2ec1..ca331d3a2 100644
--- a/packages/create-rslib/fragments/tools/rstest-vue-ts/package.json
+++ b/packages/create-rslib/fragments/tools/rstest-vue-ts/package.json
@@ -3,7 +3,7 @@
     "test": "rstest"
   },
   "devDependencies": {
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/vue": "^8.1.0",
     "@vue/test-utils": "^2.4.6",
diff --git a/packages/create-rslib/rstest.config.ts b/packages/create-rslib/rstest.config.ts
index 3fa38f782..bf33a590c 100644
--- a/packages/create-rslib/rstest.config.ts
+++ b/packages/create-rslib/rstest.config.ts
@@ -1,5 +1,5 @@
 import { defineConfig } from '@rstest/core';
-import { shared } from '../../rstest.workspace';
+import { shared } from '../../rstest.config';
 
 export default defineConfig({
   ...shared,
diff --git a/packages/create-rslib/template-[node-dual]-[rstest]-js/package.json b/packages/create-rslib/template-[node-dual]-[rstest]-js/package.json
index 573afbb3f..f54b23b8a 100644
--- a/packages/create-rslib/template-[node-dual]-[rstest]-js/package.json
+++ b/packages/create-rslib/template-[node-dual]-[rstest]-js/package.json
@@ -19,6 +19,6 @@
   },
   "devDependencies": {
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0"
+    "@rstest/core": "^0.3.1"
   }
 }
diff --git a/packages/create-rslib/template-[node-dual]-[rstest]-ts/package.json b/packages/create-rslib/template-[node-dual]-[rstest]-ts/package.json
index c4a4bf041..8941541fa 100644
--- a/packages/create-rslib/template-[node-dual]-[rstest]-ts/package.json
+++ b/packages/create-rslib/template-[node-dual]-[rstest]-ts/package.json
@@ -21,7 +21,7 @@
   },
   "devDependencies": {
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@types/node": "^22.18.0",
     "typescript": "^5.9.2"
   }
diff --git a/packages/create-rslib/template-[node-esm]-[rstest]-js/package.json b/packages/create-rslib/template-[node-esm]-[rstest]-js/package.json
index 28f4a29f5..89f086e96 100644
--- a/packages/create-rslib/template-[node-esm]-[rstest]-js/package.json
+++ b/packages/create-rslib/template-[node-esm]-[rstest]-js/package.json
@@ -17,6 +17,6 @@
   },
   "devDependencies": {
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0"
+    "@rstest/core": "^0.3.1"
   }
 }
diff --git a/packages/create-rslib/template-[node-esm]-[rstest]-ts/package.json b/packages/create-rslib/template-[node-esm]-[rstest]-ts/package.json
index c5a021a93..3322bc21f 100644
--- a/packages/create-rslib/template-[node-esm]-[rstest]-ts/package.json
+++ b/packages/create-rslib/template-[node-esm]-[rstest]-ts/package.json
@@ -19,7 +19,7 @@
   },
   "devDependencies": {
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@types/node": "^22.18.0",
     "typescript": "^5.9.2"
   }
diff --git a/packages/create-rslib/template-[react]-[rstest,storybook]-js/package.json b/packages/create-rslib/template-[react]-[rstest,storybook]-js/package.json
index 86ea87839..6ac02560d 100644
--- a/packages/create-rslib/template-[react]-[rstest,storybook]-js/package.json
+++ b/packages/create-rslib/template-[react]-[rstest,storybook]-js/package.json
@@ -21,7 +21,7 @@
     "@rsbuild/core": "~1.5.1",
     "@rsbuild/plugin-react": "^1.3.5",
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@storybook/addon-docs": "^9.1.3",
     "@storybook/addon-essentials": "^9.0.0-alpha.12",
     "@storybook/addon-interactions": "^9.0.0-alpha.10",
diff --git a/packages/create-rslib/template-[react]-[rstest,storybook]-ts/package.json b/packages/create-rslib/template-[react]-[rstest,storybook]-ts/package.json
index ca400af6a..451bc4f14 100644
--- a/packages/create-rslib/template-[react]-[rstest,storybook]-ts/package.json
+++ b/packages/create-rslib/template-[react]-[rstest,storybook]-ts/package.json
@@ -23,7 +23,7 @@
     "@rsbuild/core": "~1.5.1",
     "@rsbuild/plugin-react": "^1.3.5",
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@storybook/addon-docs": "^9.1.3",
     "@storybook/addon-essentials": "^9.0.0-alpha.12",
     "@storybook/addon-interactions": "^9.0.0-alpha.10",
diff --git a/packages/create-rslib/template-[react]-[rstest]-js/package.json b/packages/create-rslib/template-[react]-[rstest]-js/package.json
index fb307f068..ab0e896db 100644
--- a/packages/create-rslib/template-[react]-[rstest]-js/package.json
+++ b/packages/create-rslib/template-[react]-[rstest]-js/package.json
@@ -18,7 +18,7 @@
   "devDependencies": {
     "@rsbuild/plugin-react": "^1.3.5",
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/react": "^16.3.0",
     "jsdom": "^26.1.0",
diff --git a/packages/create-rslib/template-[react]-[rstest]-ts/package.json b/packages/create-rslib/template-[react]-[rstest]-ts/package.json
index 6afeb3914..c844ce15b 100644
--- a/packages/create-rslib/template-[react]-[rstest]-ts/package.json
+++ b/packages/create-rslib/template-[react]-[rstest]-ts/package.json
@@ -20,7 +20,7 @@
   "devDependencies": {
     "@rsbuild/plugin-react": "^1.3.5",
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/react": "^16.3.0",
     "@types/react": "^19.1.12",
diff --git a/packages/create-rslib/template-[vue]-[rstest,storybook]-js/package.json b/packages/create-rslib/template-[vue]-[rstest,storybook]-js/package.json
index 82ca61fcd..927d53285 100644
--- a/packages/create-rslib/template-[vue]-[rstest,storybook]-js/package.json
+++ b/packages/create-rslib/template-[vue]-[rstest,storybook]-js/package.json
@@ -22,7 +22,7 @@
   "devDependencies": {
     "@rsbuild/core": "~1.5.1",
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@storybook/addon-docs": "^9.1.3",
     "@storybook/addon-essentials": "^9.0.0-alpha.12",
     "@storybook/addon-interactions": "^9.0.0-alpha.10",
diff --git a/packages/create-rslib/template-[vue]-[rstest,storybook]-ts/package.json b/packages/create-rslib/template-[vue]-[rstest,storybook]-ts/package.json
index 7d44810c2..2fe881de2 100644
--- a/packages/create-rslib/template-[vue]-[rstest,storybook]-ts/package.json
+++ b/packages/create-rslib/template-[vue]-[rstest,storybook]-ts/package.json
@@ -22,7 +22,7 @@
   "devDependencies": {
     "@rsbuild/core": "~1.5.1",
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@storybook/addon-docs": "^9.1.3",
     "@storybook/addon-essentials": "^9.0.0-alpha.12",
     "@storybook/addon-interactions": "^9.0.0-alpha.10",
diff --git a/packages/create-rslib/template-[vue]-[rstest]-js/package.json b/packages/create-rslib/template-[vue]-[rstest]-js/package.json
index bee67c054..10cc1f174 100644
--- a/packages/create-rslib/template-[vue]-[rstest]-js/package.json
+++ b/packages/create-rslib/template-[vue]-[rstest]-js/package.json
@@ -19,7 +19,7 @@
   },
   "devDependencies": {
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/vue": "^8.1.0",
     "@vue/test-utils": "^2.4.6",
diff --git a/packages/create-rslib/template-[vue]-[rstest]-ts/package.json b/packages/create-rslib/template-[vue]-[rstest]-ts/package.json
index 94c213f7c..3a1ddc713 100644
--- a/packages/create-rslib/template-[vue]-[rstest]-ts/package.json
+++ b/packages/create-rslib/template-[vue]-[rstest]-ts/package.json
@@ -19,7 +19,7 @@
   },
   "devDependencies": {
     "@rslib/core": "workspace:*",
-    "@rstest/core": "^0.3.0",
+    "@rstest/core": "^0.3.1",
     "@testing-library/jest-dom": "^6.8.0",
     "@testing-library/vue": "^8.1.0",
     "@vue/test-utils": "^2.4.6",
diff --git a/packages/plugin-dts/rstest.config.ts b/packages/plugin-dts/rstest.config.ts
index ac0839048..4adda01f4 100644
--- a/packages/plugin-dts/rstest.config.ts
+++ b/packages/plugin-dts/rstest.config.ts
@@ -1,5 +1,5 @@
 import { defineConfig } from '@rstest/core';
-import { shared } from '../../rstest.workspace';
+import { shared } from '../../rstest.config';
 
 // Disable color in test
 process.env.NO_COLOR = '1';
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 399d5fabe..4eb9ed11d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -21,8 +21,8 @@ importers:
         specifier: ^0.1.12
         version: 0.1.12
       '@rstest/core':
-        specifier: ^0.3.0
-        version: 0.3.0
+        specifier: ^0.3.1
+        version: 0.3.1
       '@types/fs-extra':
         specifier: ^11.0.4
         version: 11.0.4
@@ -2816,8 +2816,8 @@ packages:
   '@rstack-dev/doc-ui@1.11.0':
     resolution: {integrity: sha512-5GZ8EwvmKj8LXomEElC4GhDlDW2SazCeHbA+ieacJrlcGduuiJXGTBzVA2rNnPLjAb41H0esuy0aH0skRIQAqA==}
 
-  '@rstest/core@0.3.0':
-    resolution: {integrity: sha512-R/pETy1rJG6tDL8FvfCiaFt4R/nc1N0JhsBW3Ldrgj3ADgQgR9P6hDDjR4pBGy8HR5gH4utCacICwLTsJnmNww==}
+  '@rstest/core@0.3.1':
+    resolution: {integrity: sha512-bTFhWWhf84EsrSazUrpIdCJHlWvK2HfP90B+vRx6Y8K+rCaRtq6tQo3d9atjRT/ttvw+gSR1Zdy1daiqEVI8Ng==}
     engines: {node: '>=18.12.0'}
     hasBin: true
     peerDependencies:
@@ -9526,7 +9526,7 @@ snapshots:
       - react
       - react-dom
 
-  '@rstest/core@0.3.0':
+  '@rstest/core@0.3.1':
     dependencies:
       '@rsbuild/core': 1.5.0
       '@types/chai': 5.2.2
diff --git a/rstest.config.ts b/rstest.config.ts
new file mode 100644
index 000000000..bddba1db3
--- /dev/null
+++ b/rstest.config.ts
@@ -0,0 +1,14 @@
+// import type { ProjectConfig } from '@rstest/core';
+import { defineConfig, type RstestConfig } from '@rstest/core';
+
+export const shared: RstestConfig = {
+  globals: true,
+  testEnvironment: 'node',
+  testTimeout: 60_000,
+  hookTimeout: 50_000,
+  restoreMocks: true,
+};
+
+export default defineConfig({
+  projects: ['packages/*', 'tests'],
+});
diff --git a/rstest.workspace.ts b/rstest.workspace.ts
deleted file mode 100644
index c4cc82660..000000000
--- a/rstest.workspace.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-// TODO: projects is not supported in Rstest yet, so we use a single config file for now.
-
-// import type { ProjectConfig } from '@rstest/core';
-import type { RstestConfig } from '@rstest/core';
-
-export const shared: RstestConfig = {
-  globals: true,
-  testEnvironment: 'node',
-  testTimeout: 60_000,
-  hookTimeout: 50_000,
-  restoreMocks: true,
-  exclude: ['**/node_modules/**'],
-};
-
-// export default defineWorkspace(['packages/*', 'tests']);
diff --git a/tests/rstest.config.ts b/tests/rstest.config.ts
index 3f899bebf..adde17b05 100644
--- a/tests/rstest.config.ts
+++ b/tests/rstest.config.ts
@@ -1,6 +1,6 @@
 // import codspeedPlugin from '@codspeed/vitest-plugin';
 import { defineConfig } from '@rstest/core';
-import { shared } from '../rstest.workspace';
+import { shared } from '../rstest.config';
 
 export default defineConfig({
   ...shared,