diff --git a/CryptoExchange.Net.UnitTests/SymbolOrderBookTests.cs b/CryptoExchange.Net.UnitTests/SymbolOrderBookTests.cs
index d28eeb3..7f56fe6 100644
--- a/CryptoExchange.Net.UnitTests/SymbolOrderBookTests.cs
+++ b/CryptoExchange.Net.UnitTests/SymbolOrderBookTests.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Threading;
 using System.Threading.Tasks;
 using CryptoExchange.Net.Interfaces;
 using CryptoExchange.Net.Objects;
@@ -22,12 +23,12 @@ namespace CryptoExchange.Net.UnitTests
 
             public override void Dispose() {}
 
-            protected override Task<CallResult<bool>> DoResyncAsync()
+            protected override Task<CallResult<bool>> DoResyncAsync(CancellationToken ct)
             {
                 throw new NotImplementedException();
             }
 
-            protected override Task<CallResult<UpdateSubscription>> DoStartAsync()
+            protected override Task<CallResult<UpdateSubscription>> DoStartAsync(CancellationToken ct)
             {
                 throw new NotImplementedException();
             }