diff --git a/Octokit.Tests.Integration/CommitsClientTests.cs b/Octokit.Tests.Integration/CommitsClientTests.cs
index 72b76ac0..ddbc53f0 100644
--- a/Octokit.Tests.Integration/CommitsClientTests.cs
+++ b/Octokit.Tests.Integration/CommitsClientTests.cs
@@ -21,10 +21,10 @@ namespace Octokit.Tests.Integration
 
             var repoName = Helper.MakeNameWithTimestamp("public-repo");
             this._commitsClient = this._gitHubClient.GitDatabase.Commit;
-            this._repository = this._gitHubClient.Repository.Create(new NewRepository { Name = repoName }).Result;
+            this._repository = this._gitHubClient.Repository.Create(new NewRepository { Name = repoName, AutoInit = true }).Result;
         }
 
-        [IntegrationTest(Skip = "Requires additional repository setup")]
+        [IntegrationTest]
         public async Task CanCreateAndRetrieveCommit()
         {
             string owner = this._repository.Owner.Login;
diff --git a/Octokit/Models/Response/Commit.cs b/Octokit/Models/Response/Commit.cs
index cd549412..bcaacf44 100644
--- a/Octokit/Models/Response/Commit.cs
+++ b/Octokit/Models/Response/Commit.cs
@@ -2,20 +2,12 @@
 
 namespace Octokit
 {
-    public class Commit
+    public class Commit : GitReference
     {
-        public string Sha { get; set; }
-        public string Url { get; set; }
         public string Message { get; set; }
         public UserAction Author { get; set; }
         public UserAction Committer { get; set; }
         public GitReference Tree { get; set; }
         public IEnumerable<GitReference> Parents { get; set; }
     }
-
-    public class GitReference
-    {
-        public string Url { get; set; }
-        public string Sha { get; set; }
-    }
 }
\ No newline at end of file
diff --git a/Octokit/Models/Response/GitReference.cs b/Octokit/Models/Response/GitReference.cs
new file mode 100644
index 00000000..cae404d1
--- /dev/null
+++ b/Octokit/Models/Response/GitReference.cs
@@ -0,0 +1,8 @@
+namespace Octokit
+{
+    public class GitReference
+    {
+        public string Url { get; set; }
+        public string Sha { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/Octokit/Models/Response/GitTag.cs b/Octokit/Models/Response/GitTag.cs
index 7005e5c4..6fb70c10 100644
--- a/Octokit/Models/Response/GitTag.cs
+++ b/Octokit/Models/Response/GitTag.cs
@@ -1,10 +1,8 @@
 namespace Octokit
 {
-    public class GitTag
+    public class GitTag : GitReference
     {
         public string Tag { get; set; }
-        public string Sha { get; set; }
-        public string Url { get; set; }
         public string Message { get; set; }
         public UserAction Tagger { get; set; }
         public TagObject Object { get; set; }
diff --git a/Octokit/Models/Response/TagObject.cs b/Octokit/Models/Response/TagObject.cs
index 7d9aa53e..b9c4b7cf 100644
--- a/Octokit/Models/Response/TagObject.cs
+++ b/Octokit/Models/Response/TagObject.cs
@@ -1,12 +1,10 @@
 namespace Octokit
 {
-    public class TagObject
+    public class TagObject : GitReference
     {
         [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1721:PropertyNamesShouldNotMatchGetMethods", 
             Justification = "Name defined by web api and required for deserialisation")]
         public TaggedType Type { get; set; }
-        public string Sha { get; set; }
-        public string Url { get; set; }
     }
 
     /// <summary>
@@ -18,5 +16,4 @@
         Blob,
         Tree
     }
-
 }
\ No newline at end of file
diff --git a/Octokit/Octokit-Mono.csproj b/Octokit/Octokit-Mono.csproj
index d039d4aa..60c33eb8 100644
--- a/Octokit/Octokit-Mono.csproj
+++ b/Octokit/Octokit-Mono.csproj
@@ -77,6 +77,7 @@
     <Compile Include="Models\Response\Activity.cs" />
     <Compile Include="Models\Response\CommitStatus.cs" />
     <Compile Include="Models\Response\EventInfo.cs" />
+    <Compile Include="Models\Response\GitReference.cs" />
     <Compile Include="Models\Response\GitTag.cs" />
     <Compile Include="Models\Response\Issue.cs" />
     <Compile Include="Models\Request\IssueRequest.cs" />
diff --git a/Octokit/Octokit-netcore45.csproj b/Octokit/Octokit-netcore45.csproj
index b9c9fc6f..3d374758 100644
--- a/Octokit/Octokit-netcore45.csproj
+++ b/Octokit/Octokit-netcore45.csproj
@@ -166,6 +166,7 @@
     <Compile Include="Models\Response\Commit.cs" />
     <Compile Include="Models\Response\CommitStatus.cs" />
     <Compile Include="Models\Response\EmailAddress.cs" />
+    <Compile Include="Models\Response\GitReference.cs" />
     <Compile Include="Models\Response\GitTag.cs" />
     <Compile Include="Models\Response\EventInfo.cs" />
     <Compile Include="Models\Response\Issue.cs" />
diff --git a/Octokit/Octokit.csproj b/Octokit/Octokit.csproj
index 79440f1e..c08c0c54 100644
--- a/Octokit/Octokit.csproj
+++ b/Octokit/Octokit.csproj
@@ -88,6 +88,7 @@
     <Compile Include="Models\Response\Commit.cs" />
     <Compile Include="Models\Response\CommitStatus.cs" />
     <Compile Include="Models\Response\EventInfo.cs" />
+    <Compile Include="Models\Response\GitReference.cs" />
     <Compile Include="Models\Response\Issue.cs" />
     <Compile Include="Models\Request\IssueRequest.cs" />
     <Compile Include="Models\Request\IssueUpdate.cs" />