diff --git a/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundFactDiscoverer.cs b/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundFactDiscoverer.cs
index f54586b4c4..9551fd13e9 100644
--- a/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundFactDiscoverer.cs
+++ b/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundFactDiscoverer.cs
@@ -10,7 +10,7 @@ namespace Xunit
 {
     internal class ForegroundFactDiscoverer : IXunitTestCaseDiscoverer
     {
-        readonly FactDiscoverer _inner;
+        private readonly FactDiscoverer _inner;
 
         public ForegroundFactDiscoverer(IMessageSink diagnosticMessageSink)
         {
diff --git a/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundTheoryAttribute.cs b/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundTheoryAttribute.cs
new file mode 100644
index 0000000000..2c13256d9a
--- /dev/null
+++ b/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundTheoryAttribute.cs
@@ -0,0 +1,15 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Xunit.Sdk;
+
+namespace Xunit
+{
+    // Similar to WpfTheoryAttribute https://github.com/xunit/samples.xunit/blob/969d9f7e887836f01a6c525324bf3db55658c28f/STAExamples/WpfTheoryAttribute.cs
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
+    [XunitTestCaseDiscoverer("Xunit.ForegroundTheoryDiscoverer", "Microsoft.VisualStudio.LanguageServices.Razor.Test")]
+    internal class ForegroundTheoryAttribute : TheoryAttribute
+    {
+    }
+}
diff --git a/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundTheoryDiscoverer.cs b/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundTheoryDiscoverer.cs
new file mode 100644
index 0000000000..7088dbb7b8
--- /dev/null
+++ b/test/Microsoft.VisualStudio.LanguageServices.Razor.Test/Xunit/ForegroundTheoryDiscoverer.cs
@@ -0,0 +1,25 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System.Collections.Generic;
+using System.Linq;
+using Xunit.Abstractions;
+using Xunit.Sdk;
+
+namespace Xunit
+{
+    internal class ForegroundTheoryDiscoverer : IXunitTestCaseDiscoverer
+    {
+        private readonly TheoryDiscoverer _inner;
+
+        public ForegroundTheoryDiscoverer(IMessageSink diagnosticMessageSink)
+        {
+            _inner = new TheoryDiscoverer(diagnosticMessageSink);
+        }
+
+        public IEnumerable<IXunitTestCase> Discover(ITestFrameworkDiscoveryOptions discoveryOptions, ITestMethod testMethod, IAttributeInfo factAttribute)
+        {
+            return _inner.Discover(discoveryOptions, testMethod, factAttribute).Select(t => new ForegroundFactTestCase(t));
+        }
+    }
+}
\ No newline at end of file