--- a/tests/src/approve.test.ts
+++ b/tests/src/approve.test.ts
@@ -2,6 +2,7 @@
 // This file is subject to the terms and conditions defined in
 // file 'LICENSE', which is part of this source code package.
 //
+import { IKeyringPair } from '@polkadot/types/types';
 import { ApiPromise } from '@polkadot/api';
 import BN from 'bn.js';
 import chai from 'chai';
@@ -15,6 +16,7 @@
   createFungibleItemExpectSuccess,
   createItemExpectSuccess,
   destroyCollectionExpectSuccess,
+  transferExpectSuccess,
   transferFromExpectSuccess,
   U128_MAX,
 } from './util/helpers';
@@ -68,10 +70,19 @@
 });
 
 describe('Negative Integration Test approve(spender, collection_id, item_id, amount):', () => {
+  let Alice: IKeyringPair;
+  let Bob: IKeyringPair;
+
+  before(async () => {
+    await usingApi(async (api) => {
+      Alice = privateKey('//Alice');
+      Bob = privateKey('//Bob');
+    });
+  });
+
   it('Approve for a collection that does not exist', async () => {
     await usingApi(async (api: ApiPromise) => {
-      const Alice = privateKey('//Alice');
-      const Bob = privateKey('//Bob');
+
       // nft
       const nftCollectionCount = await api.query.nft.createdCollectionCount() as unknown as number;
       await approveExpectFail(nftCollectionCount + 1, 1, Alice, Bob);
@@ -86,8 +97,6 @@
 
   it('Approve for a collection that was destroyed', async () => {
     await usingApi(async (api: ApiPromise) => {
-      const Alice = privateKey('//Alice');
-      const Bob = privateKey('//Bob');
       // nft
       const nftCollectionId = await createCollectionExpectSuccess();
       await destroyCollectionExpectSuccess(nftCollectionId);
@@ -106,8 +115,6 @@
 
   it('Approve transfer of a token that does not exist', async () => {
     await usingApi(async (api: ApiPromise) => {
-      const Alice = privateKey('//Alice');
-      const Bob = privateKey('//Bob');
       // nft
       const nftCollectionId = await createCollectionExpectSuccess();
       await approveExpectFail(nftCollectionId, 2, Alice, Bob);
@@ -140,4 +147,28 @@
       await approveExpectFail(reFungibleCollectionId, newReFungibleTokenId, Bob, Alice);
     });
   });
+
+  it('should fail if approved more NFTs than owned', async () => {
+    const nftCollectionId = await createCollectionExpectSuccess({ mode: { type: 'NFT' } });
+    const newNftTokenId = await createItemExpectSuccess(Alice, nftCollectionId, 'NFT');
+    await transferExpectSuccess(nftCollectionId, newNftTokenId, Alice, Bob, 1, 'NFT');
+    await approveExpectSuccess(nftCollectionId, newNftTokenId, Bob, Alice);
+    await approveExpectFail(nftCollectionId, newNftTokenId, Bob, Alice);
+  });
+
+  it('should fail if approved more ReFungibles than owned', async () => {
+    const nftCollectionId = await createCollectionExpectSuccess({ mode: { type: 'ReFungible' } });
+    const newNftTokenId = await createItemExpectSuccess(Alice, nftCollectionId, 'ReFungible');
+    await transferExpectSuccess(nftCollectionId, newNftTokenId, Alice, Bob, 100, 'ReFungible');
+    await approveExpectSuccess(nftCollectionId, newNftTokenId, Bob, Alice, 100);
+    await approveExpectFail(nftCollectionId, newNftTokenId, Bob, Alice, 1);
+  });
+
+  it('should fail if approved more Fungibles than owned', async () => {
+    const nftCollectionId = await createCollectionExpectSuccess({ mode: { type: 'Fungible', decimalPoints: 0 } });
+    const newNftTokenId = await createItemExpectSuccess(Alice, nftCollectionId, 'Fungible');
+    await transferExpectSuccess(nftCollectionId, newNftTokenId, Alice, Bob, 10, 'Fungible');
+    await approveExpectSuccess(nftCollectionId, newNftTokenId, Bob, Alice, 10);
+    await approveExpectFail(nftCollectionId, newNftTokenId, Bob, Alice, 1);
+  });
 });