diff --git a/Octokit.Tests/Reactive/ObservableCommitsClientTests.cs b/Octokit.Tests/Reactive/ObservableCommitsClientTests.cs
index 335918c8..a662a70a 100644
--- a/Octokit.Tests/Reactive/ObservableCommitsClientTests.cs
+++ b/Octokit.Tests/Reactive/ObservableCommitsClientTests.cs
@@ -1,11 +1,8 @@
 using System;
-using System.Collections.Generic;
-using System.Reactive.Linq;
 using System.Reactive.Threading.Tasks;
 using System.Threading.Tasks;
 using NSubstitute;
 using Octokit.Reactive;
-using Octokit.Tests.Helpers;
 using Xunit;
 
 namespace Octokit.Tests.Reactive
@@ -15,7 +12,7 @@ namespace Octokit.Tests.Reactive
         public class TheCtorMethod
         {
             [Fact]
-            public void EnsuresArgumentIsNotNulll()
+            public void EnsuresArgumentIsNotNull()
             {
                 Assert.Throws<ArgumentNullException>(() => new ObservableCommitsClient(null));
             }