diff --git a/README.md b/README.md
index 7c6ac49..3858ca5 100644
--- a/README.md
+++ b/README.md
@@ -8,15 +8,29 @@ safety-web is an ESLint plugin that works on TypeScript and JavaScript projects
 
 ## Development
 
+This project uses yarn "classic" (Yarn 1) with workspaces. To install the dependencies for all [workspaces](https://classic.yarnpkg.com/en/docs/workspaces/):
+
 ```
 yarn install
-yarn workspace safety-web build
 ```
 
-## Unit testing
+The commands `clean`, `build`, `lint`, `test` are defined in all workspaces. This makes it possible to run them in all workspaces:
+
+```
+# Build all workspaces
+yarn workspaces run build
+```
+
+## safety-web unit testing
+
+```
+yarn workspaces safety-web test
+```
+
+## unit tests + integrations tests
 
 ```
-yarn workspace safety-web test
+yarn run tests
 ```
 
 ## Updating tsetse
diff --git a/package.json b/package.json
index 796031f..36d6303 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,6 @@
   "scripts": {
     "unit_tests": "yarn workspace eslint-plugin-safety-web test",
     "integration_tests": "yarn workspace basic-typescript-eslint9 test && yarn workspace basic-typescript-eslint8 test && yarn workspace basic-javascript-eslint9 test",
-    "test": "yarn run unit_tests && yarn run integration_tests"
+    "test": "yarn workspaces run test"
 }
 }
\ No newline at end of file
diff --git a/safety-web/package.json b/safety-web/package.json
index 002311f..a0008f4 100644
--- a/safety-web/package.json
+++ b/safety-web/package.json
@@ -8,8 +8,9 @@
         "lib/src/"
     ],
     "scripts": {
-        "clean": "yarn rimraf ./lib",
-        "build": "yarn clean && tsc -b ./tsconfig.json",
+        "clean": "tsc --build --clean",
+        "build": "tsc -b ./tsconfig.json",
+        "lint": "eslint",
         "test": "mocha"
     },
     "dependencies": {
diff --git a/test-helpers/expect-violations/package.json b/test-helpers/expect-violations/package.json
index d125990..1ade343 100644
--- a/test-helpers/expect-violations/package.json
+++ b/test-helpers/expect-violations/package.json
@@ -8,6 +8,10 @@
   },
   "bin": "./bin/index.js",
   "scripts": {
-    "build": "tsc"
-  }
+    "clean": "tsc --build --clean",
+    "build": "tsc",
+    "lint": "echo TODO",
+    "test": "echo TODO"
+  },
+  "devDependencies": {}
 }
diff --git a/tests/basic_javascript_eslint9/package.json b/tests/basic_javascript_eslint9/package.json
index a4082cf..7d83e45 100644
--- a/tests/basic_javascript_eslint9/package.json
+++ b/tests/basic_javascript_eslint9/package.json
@@ -4,12 +4,15 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "lint": "eslint",
-    "test": "yarn --silent lint --format json | npx expect-violations ./expected_violations.json"
+    "clean": ":",
+    "build": ":",
+    "lint": "echo skip lint script for integration test case",
+    "test": "eslint --format json | yarn run expect-violations ./expected_violations.json"
   },
   "devDependencies": {
     "eslint": "^9.6.0",
     "eslint-plugin-safety-web": "0.1.0",
+    "expect-violations": "^0.0.1",
     "typescript-eslint": "^7.16.0"
   }
 }
diff --git a/tests/basic_typescript_eslint8/package.json b/tests/basic_typescript_eslint8/package.json
index 34ed438..c1827ad 100644
--- a/tests/basic_typescript_eslint8/package.json
+++ b/tests/basic_typescript_eslint8/package.json
@@ -4,13 +4,15 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "lint": "eslint src/",
+    "clean": "tsc --build --clean",
     "build": "tsc",
-    "test": "yarn --silent lint --format json | npx expect-violations ./expected_violations.json"
+    "lint": "echo skip lint script for integration test case",
+    "test": "eslint src/ --format json | npx expect-violations ./expected_violations.json"
   },
   "devDependencies": {
     "eslint": "^8.0.0",
     "eslint-plugin-safety-web": "0.1.0",
+    "expect-violations": "^0.0.1",
     "typescript": "^5.5.3",
     "typescript-eslint": "^7.16.0"
   }
diff --git a/tests/basic_typescript_eslint9/lib/index.js b/tests/basic_typescript_eslint9/lib/index.js
new file mode 100644
index 0000000..56cce2a
--- /dev/null
+++ b/tests/basic_typescript_eslint9/lib/index.js
@@ -0,0 +1,15 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+document.createElement('script').innerHTML = 'foo';
+export {};
diff --git a/tests/basic_typescript_eslint9/package.json b/tests/basic_typescript_eslint9/package.json
index 74fdc8e..cab9a21 100644
--- a/tests/basic_typescript_eslint9/package.json
+++ b/tests/basic_typescript_eslint9/package.json
@@ -4,13 +4,15 @@
   "private": true,
   "type": "module",
   "scripts": {
-    "lint": "eslint",
+    "clean": "tsc --build --clean",
     "build": "tsc",
-    "test": "yarn --silent lint --format json | npx expect-violations ./expected_violations.json"
+    "lint": "echo skip lint script for integration test case",
+    "test": "eslint --format json | npx expect-violations ./expected_violations.json"
   },
   "devDependencies": {
     "eslint": "^9.6.0",
     "eslint-plugin-safety-web": "0.1.0",
+    "expect-violations": "^0.0.1",
     "typescript": "^5.5.3",
     "typescript-eslint": "^7.15.0"
   }