diff --git a/tests/__tests__/lookup-map.ava.js b/tests/__tests__/lookup-map.ava.js
index 2cc8b471..1ff0eeee 100644
--- a/tests/__tests__/lookup-map.ava.js
+++ b/tests/__tests__/lookup-map.ava.js
@@ -113,4 +113,16 @@ test('LookupMap set get object', async t => {
         'house house1 has 2 rooms. room room1 is 200sqft.'
     )
     
-})
\ No newline at end of file
+})
+
+test('LookupMap allows you to use the same key for the second time', async t => {
+    const { ali, lookupMapContract } = t.context.accounts;
+
+    await ali.call(lookupMapContract, 'set', { key: 'hello', value: 'world' });
+    await ali.call(lookupMapContract, 'set', { key: 'hello', value: 'world' });
+
+    t.is(
+        await lookupMapContract.view('get', { key: 'hello' }),
+        'world'
+    );
+});
\ No newline at end of file