...
//add collateral
uint256 collateralShare = yieldBox.toShare(
    collateralId,
    collateralAmount,
    false
);
_allowedBorrow(from, collateralShare);
_addCollateral(from, from, false, 0, collateralShare);
...
diff --git a/singularity.test.ts b/singularity.test.ts.modified
index 9c82d10..9ba9c76 100755
--- a/singularity.test.ts
+++ b/singularity.test.ts.modified
@@ -3440,6 +3440,7 @@ describe('Singularity test', () => {
         it('should bounce between 2 chains', async () => {
             const {
                 deployer,
+                eoa1,
                 tap,
                 weth,
                 createTokenEmptyStrategy,
@@ -4082,7 +4083,7 @@ describe('Singularity test', () => {
                 ethers.constants.MaxUint256,
             );

-            await SGL_10.multiHopBuyCollateral(
+            await SGL_10.connect(eoa1).multiHopBuyCollateral(
                 deployer.address,
                 0,
                 bigDummyAmount,
function multiHopBuyCollateral(
    address from,
    uint256 collateralAmount,
    uint256 borrowAmount,
    IUSDOBase.ILeverageSwapData calldata swapData,
    IUSDOBase.ILeverageLZData calldata lzData,
    IUSDOBase.ILeverageExternalContractsData calldata externalData
) external payable notPaused solvent(from) {
    ...

    //borrow
    (, uint256 borrowShare) = _borrow(from, from, borrowAmount);

+   //@audit => Validate that the caller has enough allowance to take the borrow
+   _allowedBorrow(from, borrowShare);

    ...
}
