diff --git a/src/Compilers/CSharp/Test/WinRT/CodeGen/WinRTCollectionTests.cs b/src/Compilers/CSharp/Test/WinRT/CodeGen/WinRTCollectionTests.cs
index 7af304e9e991f..1e4f107ba02f8 100644
--- a/src/Compilers/CSharp/Test/WinRT/CodeGen/WinRTCollectionTests.cs
+++ b/src/Compilers/CSharp/Test/WinRT/CodeGen/WinRTCollectionTests.cs
@@ -44,7 +44,7 @@ public object GetItem(int i)
             comp.VerifyDiagnostics();
         }
 
-        [Fact]
+        [ConditionalFact(typeof(OSVersionWin8))]
         public void IVectorProjectionTests()
         {
             var source =
@@ -167,7 +167,7 @@ .locals init (Windows.Data.Json.JsonArray V_0, //jsonArray
 ");
         }
 
-        [Fact]
+        [ConditionalFact(typeof(OSVersionWin8))]
         public void IVectorViewProjectionTests()
         {
             var source =
@@ -211,7 +211,7 @@ .locals init (Windows.Foundation.WwwFormUrlDecoder V_0) //results
 }");
         }
 
-        [Fact]
+        [ConditionalFact(typeof(OSVersionWin8))]
         public void IMapProjectionTests()
         {
             var source =
diff --git a/src/Compilers/CSharp/Test/WinRT/Metadata/WinMdMetadataTests.cs b/src/Compilers/CSharp/Test/WinRT/Metadata/WinMdMetadataTests.cs
index 20be9068d08a4..7fb2f1c90a3f2 100644
--- a/src/Compilers/CSharp/Test/WinRT/Metadata/WinMdMetadataTests.cs
+++ b/src/Compilers/CSharp/Test/WinRT/Metadata/WinMdMetadataTests.cs
@@ -183,7 +183,7 @@ public void IReferenceToINullableType()
         /// <summary>
         /// Test that a program projects IReference to INullable.
         /// </summary>
-        [Fact]
+        [ConditionalFact(typeof(OSVersionWin8))]
         public void WinMdIReferenceINullableTest()
         {
             var source =