diff --git a/MiningTests.cs b/MiningTests.cs
index b16672aa828..d265e029cad 100644
--- a/MiningTests.cs
+++ b/MiningTests.cs
@@ -73,7 +73,7 @@ public void PremineIsReceived()
                 CoreNode node = builder.CreatePoANode(network, network.FederationKeys[0]).WithWallet("pass", walletName).Start();
                 node.EnableFastMining();
 
-                IWalletManager walletManager = node.FullNode.NodeService<IWalletManager>();
+                var walletManager = node.FullNode.NodeService<IWalletManager>();
                 long balanceOnStart = walletManager.GetBalances(walletName, "account 0").Sum(x => x.AmountConfirmed);
                 Assert.Equal(0, balanceOnStart);
 
diff --git a/Utils/SidechainNodeBuilder.cs b/Utils/SidechainNodeBuilder.cs
index 7a8129f1fbb..3544243467b 100644
--- a/Utils/SidechainNodeBuilder.cs
+++ b/Utils/SidechainNodeBuilder.cs
@@ -24,7 +24,7 @@ private SidechainNodeBuilder(string rootFolder) : base(rootFolder)
         public static SidechainNodeBuilder CreateSidechainNodeBuilder(object caller, [CallerMemberName] string callingMethod = null)
         {
             string testFolderPath = Bitcoin.Tests.Common.TestBase.CreateTestDir(caller, callingMethod);
-            SidechainNodeBuilder builder = new SidechainNodeBuilder(testFolderPath);
+            var builder = new SidechainNodeBuilder(testFolderPath);
             builder.WithLogsDisabled();
 
             return builder;