diff --git a/Thirdweb.Tests/Thirdweb.Transactions.Tests.cs b/Thirdweb.Tests/Thirdweb.Transactions.Tests.cs
index 2f5b9f2..e041952 100644
--- a/Thirdweb.Tests/Thirdweb.Transactions.Tests.cs
+++ b/Thirdweb.Tests/Thirdweb.Transactions.Tests.cs
@@ -221,11 +221,13 @@ public async Task EstimateTotalCosts_HigherThanGasCostsByValue()
         _ = transaction.SetValue(new BigInteger(1000));
         _ = transaction.SetGasLimit(21000);
 
-        var totalCosts = await ThirdwebTransaction.EstimateTotalCosts(transaction);
-        var gasCosts = await ThirdwebTransaction.EstimateGasCosts(transaction);
+        var totalCostsTask = ThirdwebTransaction.EstimateTotalCosts(transaction);
+        var gasCostsTask = ThirdwebTransaction.EstimateGasCosts(transaction);
 
-        Assert.True(totalCosts.wei > gasCosts.wei);
-        Assert.True(totalCosts.wei - gasCosts.wei == transaction.Input.Value.Value);
+        var costs = await Task.WhenAll(totalCostsTask, gasCostsTask);
+
+        Assert.True(costs[0].wei > costs[1].wei);
+        Assert.True(costs[0].wei - costs[1].wei == transaction.Input.Value.Value);
     }
 
     [Fact]