diff --git a/tests/tests-basic/package.json b/tests/tests-basic/package.json
index e78fc31..31b5056 100644
--- a/tests/tests-basic/package.json
+++ b/tests/tests-basic/package.json
@@ -20,9 +20,15 @@
     "nodejsexample_12_exports": "file:nodejsexample_12_exports",
     "resolvewithplus": "file:.."
   },
-  "workspaces": ["workspaces/*"],
+  "workspaces": [
+    "workspaces-js/*",
+    "workspaces-ts/*"
+  ],
   "scripts": {
-    "test-workspace": "npm --prefix workspaces/b test",
-    "test": "node --experimental-import-meta-resolve --test tests-basic.test.js tests-export-patterns.test.js tests-import-patterns.test.js"
+    "test-workspaces-js": "npm --prefix workspaces-js/js-b test",
+    "test-workspaces-ts": "npm --prefix workspaces-ts/ts-b test",
+    "test-workspaces": "npm run test-workspaces-js && npm run test-workspaces-ts",
+    "test-vanilla": "node --experimental-import-meta-resolve --test tests-basic.test.js tests-export-patterns.test.js tests-import-patterns.test.js",
+    "test": "npm run test-workspaces && npm run test-vanilla"
   }
 }
diff --git a/tests/tests-basic/workspaces/a/index.js b/tests/tests-basic/workspaces-js/js-a/index.js
similarity index 100%
rename from tests/tests-basic/workspaces/a/index.js
rename to tests/tests-basic/workspaces-js/js-a/index.js
diff --git a/tests/tests-basic/workspaces/a/package.json b/tests/tests-basic/workspaces-js/js-a/package.json
similarity index 78%
rename from tests/tests-basic/workspaces/a/package.json
rename to tests/tests-basic/workspaces-js/js-a/package.json
index e9ec9a1..17e9f94 100644
--- a/tests/tests-basic/workspaces/a/package.json
+++ b/tests/tests-basic/workspaces-js/js-a/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "a",
+  "name": "js-a",
   "version": "0.0.0",
   "type": "module",
   "main": "index.js"
diff --git a/tests/tests-basic/workspaces/b/index.js b/tests/tests-basic/workspaces-js/js-b/index.js
similarity index 100%
rename from tests/tests-basic/workspaces/b/index.js
rename to tests/tests-basic/workspaces-js/js-b/index.js
diff --git a/tests/tests-basic/workspaces/b/package.json b/tests/tests-basic/workspaces-js/js-b/package.json
similarity index 79%
rename from tests/tests-basic/workspaces/b/package.json
rename to tests/tests-basic/workspaces-js/js-b/package.json
index 0b16570..835a4db 100644
--- a/tests/tests-basic/workspaces/b/package.json
+++ b/tests/tests-basic/workspaces-js/js-b/package.json
@@ -1,11 +1,11 @@
 {
-  "name": "b",
+  "name": "js-b",
   "version": "0.0.0",
   "type": "module",
   "scripts": {
     "test": "node --experimental-import-meta-resolve --test"
   },
   "dependencies": {
-    "a": "^0.0.0"
+    "js-a": "^0.0.0"
   }
 }
diff --git a/tests/tests-basic/workspaces/b/test.js b/tests/tests-basic/workspaces-js/js-b/test.js
similarity index 76%
rename from tests/tests-basic/workspaces/b/test.js
rename to tests/tests-basic/workspaces-js/js-b/test.js
index 325b30b..e30f2f9 100644
--- a/tests/tests-basic/workspaces/b/test.js
+++ b/tests/tests-basic/workspaces-js/js-b/test.js
@@ -4,6 +4,6 @@ import resolvewithplus from '../../../../resolvewithplus.js'
 
 test('should return workspace paths', () => {
   assert.strictEqual(
-    import.meta.resolve('a'),
-    resolvewithplus('a'))
+    import.meta.resolve('js-a'),
+    resolvewithplus('js-a'))
 })
diff --git a/tests/tests-basic/workspaces-ts/ts-a/index.ts b/tests/tests-basic/workspaces-ts/ts-a/index.ts
new file mode 100644
index 0000000..c970c82
--- /dev/null
+++ b/tests/tests-basic/workspaces-ts/ts-a/index.ts
@@ -0,0 +1,3 @@
+export function foo () {
+  return 'foo'
+}
diff --git a/tests/tests-basic/workspaces-ts/ts-a/package.json b/tests/tests-basic/workspaces-ts/ts-a/package.json
new file mode 100644
index 0000000..b197b2f
--- /dev/null
+++ b/tests/tests-basic/workspaces-ts/ts-a/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "ts-a",
+  "version": "0.0.0",
+  "type": "module",
+  "main": "index.js"
+}
diff --git a/tests/tests-basic/workspaces-ts/ts-b/index.ts b/tests/tests-basic/workspaces-ts/ts-b/index.ts
new file mode 100644
index 0000000..cd0f9ec
--- /dev/null
+++ b/tests/tests-basic/workspaces-ts/ts-b/index.ts
@@ -0,0 +1,5 @@
+import {foo} from 'a'
+
+export default function test () {
+  return foo()
+}
diff --git a/tests/tests-basic/workspaces-ts/ts-b/package.json b/tests/tests-basic/workspaces-ts/ts-b/package.json
new file mode 100644
index 0000000..0ba0065
--- /dev/null
+++ b/tests/tests-basic/workspaces-ts/ts-b/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "ts-b",
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "test": "node --loader=ts-node/esm --test test.ts"
+  },
+  "dependencies": {
+    "ts-a": "^0.0.0"
+  },
+  "devDependencies": {
+    "ts-node": "^10.9.1"
+  }
+}
diff --git a/tests/tests-basic/workspaces-ts/ts-b/test.ts b/tests/tests-basic/workspaces-ts/ts-b/test.ts
new file mode 100644
index 0000000..509b072
--- /dev/null
+++ b/tests/tests-basic/workspaces-ts/ts-b/test.ts
@@ -0,0 +1,12 @@
+import test from 'node:test'
+import assert from 'node:assert/strict'
+import resolvewithplus from '../../../../resolvewithplus.js'
+
+console.log('test here!')
+/*
+test('should return workspace paths', () => {
+  assert.strictEqual(
+    import.meta.resolve('ts-a'),
+    resolvewithplus('ts-a'))
+})
+*/
diff --git a/tests/tests-basic/workspaces-ts/ts-b/tsconfig.json b/tests/tests-basic/workspaces-ts/ts-b/tsconfig.json
new file mode 100644
index 0000000..5b17f4e
--- /dev/null
+++ b/tests/tests-basic/workspaces-ts/ts-b/tsconfig.json
@@ -0,0 +1,8 @@
+{
+  "esm": true,
+  "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
+    "module": "ESNext",
+    "moduleResolution": "node"
+  }
+}