diff --git a/test/GasEstimation.spec.ts b/test/GasEstimation.spec.ts
index 2c66962..850d649 100644
--- a/test/GasEstimation.spec.ts
+++ b/test/GasEstimation.spec.ts
@@ -156,7 +156,7 @@ contract('Estimate gas usage', () => {
 
         expect(estimated).to.approximately(await gasUsedFor(realTx), 5000)
 
-        expect(await callReceiver.lastValA()).to.equal(1)
+        expect(await callReceiver.lastValA()).to.equal(1n)
       })
 
       it('Should estimate wallet deployment + upgrade + failed transaction', async () => {