diff --git a/Octokit.Tests.Integration/Clients/TeamsClientTests.cs b/Octokit.Tests.Integration/Clients/TeamsClientTests.cs
index 1e653c79..a80a6da0 100644
--- a/Octokit.Tests.Integration/Clients/TeamsClientTests.cs
+++ b/Octokit.Tests.Integration/Clients/TeamsClientTests.cs
@@ -48,7 +48,7 @@ public class TeamsClientTests
     public class TheGetAllForCurrentMethod
     {
         [IntegrationTest]
-        public async Task GetsIsMemberWhenAuthenticated()
+        public async Task GetsAllForCurrentWhenAuthenticated()
         {
             var github = Helper.GetAuthenticatedClient();
             var teams = await github.Organization.Team.GetAllForCurrent();
diff --git a/Octokit.Tests.Integration/Reactive/ObservableTeamsClientTests.cs b/Octokit.Tests.Integration/Reactive/ObservableTeamsClientTests.cs
index 68b7dc9d..d6743e8c 100644
--- a/Octokit.Tests.Integration/Reactive/ObservableTeamsClientTests.cs
+++ b/Octokit.Tests.Integration/Reactive/ObservableTeamsClientTests.cs
@@ -10,13 +10,13 @@ public class ObservableTeamsClientTests
 {
     public class TheGetMembersMethod
     {
-        readonly Team team;
+        readonly Team _team;
 
         public TheGetMembersMethod()
         {
             var github = Helper.GetAuthenticatedClient();
 
-            team = github.Organization.Team.GetAll(Helper.Organization).Result.First();
+            _team = github.Organization.Team.GetAll(Helper.Organization).Result.First();
         }
 
         [OrganizationTest]
@@ -26,7 +26,7 @@ public class ObservableTeamsClientTests
 
             var client = new ObservableTeamsClient(github);
 
-            var member = await client.GetAllMembers(team.Id, ApiOptions.None);
+            var member = await client.GetAllMembers(_team.Id, ApiOptions.None);
 
             Assert.Equal(Helper.UserName, member.Login);
         }
diff --git a/Octokit.Tests/Octokit.Tests.csproj b/Octokit.Tests/Octokit.Tests.csproj
index 8fd268a0..4bb75c60 100644
--- a/Octokit.Tests/Octokit.Tests.csproj
+++ b/Octokit.Tests/Octokit.Tests.csproj
@@ -218,6 +218,7 @@
     <Compile Include="Reactive\ObservableGistsTests.cs" />
     <Compile Include="Reactive\ObservableStarredClientTests.cs" />
     <Compile Include="Reactive\ObservableStatisticsClientTests.cs" />
+    <Compile Include="Reactive\ObservableTeamsClientTests.cs" />
     <Compile Include="Reactive\ObservableTreesClientTests.cs" />
     <Compile Include="Reactive\ObservableFollowersTest.cs" />
     <Compile Include="Reactive\ObservableUserKeysClientTests.cs" />
diff --git a/Octokit.Tests/Reactive/ObservableTeamsClientTests.cs b/Octokit.Tests/Reactive/ObservableTeamsClientTests.cs
new file mode 100644
index 00000000..eebd3491
--- /dev/null
+++ b/Octokit.Tests/Reactive/ObservableTeamsClientTests.cs
@@ -0,0 +1,47 @@
+using System;
+using System.Reactive.Threading.Tasks;
+using System.Threading.Tasks;
+using NSubstitute;
+using Octokit.Reactive;
+using Xunit;
+
+namespace Octokit.Tests.Reactive
+{
+    public class ObservableTeamsClientTests
+    {
+        public class TheCreateMethod
+        {
+            [Fact]
+            public void PostsToCorrectUrl()
+            {
+                var team = new NewTeam("avengers");
+                var github = Substitute.For<IGitHubClient>();
+                var client = new ObservableTeamsClient(github);
+
+                client.Create("shield", team);
+
+                github.Organization.Team.Received().Create("shield", team);
+            }
+
+            [Fact]
+            public void EnsuresNotNullAndNonEmptyArguments()
+            {
+                var github = Substitute.For<IGitHubClient>();
+                var client = new ObservableTeamsClient(github);
+
+                Assert.ThrowsAsync<ArgumentNullException>(() => client.Create("shield", null).ToTask());
+                Assert.ThrowsAsync<ArgumentNullException>(() => client.Create(null, new NewTeam("avengers")).ToTask());
+                Assert.ThrowsAsync<ArgumentException>(() => client.Create("", new NewTeam("avengers")).ToTask());
+            }
+        }
+
+        public class TheCtor
+        {
+            [Fact]
+            public void EnsuresNotNullGitHubClient()
+            {
+                Assert.Throws<ArgumentNullException>(() => new ObservableTeamsClient(null));
+            }
+        } 
+    }
+}
\ No newline at end of file