diff --git a/tests/tests-workspaces/package.json b/tests/tests-workspaces/package.json
new file mode 100644
index 00000000..074e1d1f
--- /dev/null
+++ b/tests/tests-workspaces/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "esmock unit tests, workspaces",
+  "workspaces": ["packages/*"],
+  "esmock": "file:..",
+  "scripts": {
+    "test": "npm --prefix packages/b test"
+  }
+}
diff --git a/tests/tests-workspaces/packages/a/index.js b/tests/tests-workspaces/packages/a/index.js
new file mode 100644
index 00000000..c970c823
--- /dev/null
+++ b/tests/tests-workspaces/packages/a/index.js
@@ -0,0 +1,3 @@
+export function foo () {
+  return 'foo'
+}
diff --git a/tests/tests-workspaces/packages/a/package.json b/tests/tests-workspaces/packages/a/package.json
new file mode 100644
index 00000000..e9ec9a18
--- /dev/null
+++ b/tests/tests-workspaces/packages/a/package.json
@@ -0,0 +1,6 @@
+{
+  "name": "a",
+  "version": "0.0.0",
+  "type": "module",
+  "main": "index.js"
+}
diff --git a/tests/tests-workspaces/packages/b/index.js b/tests/tests-workspaces/packages/b/index.js
new file mode 100644
index 00000000..cd0f9ecb
--- /dev/null
+++ b/tests/tests-workspaces/packages/b/index.js
@@ -0,0 +1,5 @@
+import {foo} from 'a'
+
+export default function test () {
+  return foo()
+}
diff --git a/tests/tests-workspaces/packages/b/package.json b/tests/tests-workspaces/packages/b/package.json
new file mode 100644
index 00000000..acc4f3be
--- /dev/null
+++ b/tests/tests-workspaces/packages/b/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "b",
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "test": "node --loader=esmock --test"
+  },
+  "dependencies": {
+    "a": "^0.0.0"
+  },
+  "devDependencies": {
+    "esmock": "^2.3.8"
+  }
+}
diff --git a/tests/tests-workspaces/packages/b/test.js b/tests/tests-workspaces/packages/b/test.js
new file mode 100644
index 00000000..0d566e4b
--- /dev/null
+++ b/tests/tests-workspaces/packages/b/test.js
@@ -0,0 +1,24 @@
+import esmock from 'esmock'
+import module from 'module'
+import test from 'node:test'
+import assert from 'node:assert/strict'
+
+test('works ootb', async () => {
+  const sut = await esmock('./index.js', {
+    a: { foo: () => 'bar' }
+  })
+
+  assert.equal(sut(), 'bar')
+})
+
+test('works roubdabout way', async () => {
+  const require = module.createRequire(import.meta.url)
+
+  const sut = await esmock('./index.js', {
+    [require.resolve('a')]: {
+      foo: () => 'bar'
+    }
+  })
+
+  assert.equal(sut(), 'bar')
+})