diff --git a/test/Microsoft.AspNetCore.Buffering.Tests/Microsoft.AspNetCore.Buffering.Tests.csproj b/test/Microsoft.AspNetCore.Buffering.Tests/Microsoft.AspNetCore.Buffering.Tests.csproj
index 18713da3ed..d062668356 100644
--- a/test/Microsoft.AspNetCore.Buffering.Tests/Microsoft.AspNetCore.Buffering.Tests.csproj
+++ b/test/Microsoft.AspNetCore.Buffering.Tests/Microsoft.AspNetCore.Buffering.Tests.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp1.1;net451</TargetFrameworks>
+    <TargetFrameworks>netcoreapp1.1;net452</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp1.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.HttpOverrides.Tests/Microsoft.AspNetCore.HttpOverrides.Tests.csproj b/test/Microsoft.AspNetCore.HttpOverrides.Tests/Microsoft.AspNetCore.HttpOverrides.Tests.csproj
index 98f046a40d..f77f81033a 100644
--- a/test/Microsoft.AspNetCore.HttpOverrides.Tests/Microsoft.AspNetCore.HttpOverrides.Tests.csproj
+++ b/test/Microsoft.AspNetCore.HttpOverrides.Tests/Microsoft.AspNetCore.HttpOverrides.Tests.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp1.1;net451</TargetFrameworks>
+    <TargetFrameworks>netcoreapp1.1;net452</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp1.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.ResponseCompression.Tests/BodyWrapperStreamTests.cs b/test/Microsoft.AspNetCore.ResponseCompression.Tests/BodyWrapperStreamTests.cs
index f5aa703528..cb89f8f2d9 100644
--- a/test/Microsoft.AspNetCore.ResponseCompression.Tests/BodyWrapperStreamTests.cs
+++ b/test/Microsoft.AspNetCore.ResponseCompression.Tests/BodyWrapperStreamTests.cs
@@ -108,7 +108,7 @@ namespace Microsoft.AspNetCore.ResponseCompression.Tests
             Assert.Equal(File.ReadAllBytes(path), written);
         }
 
-#if NET451
+#if NET452
         [Theory]
         [InlineData(true)]
         [InlineData(false)]
diff --git a/test/Microsoft.AspNetCore.ResponseCompression.Tests/Microsoft.AspNetCore.ResponseCompression.Tests.csproj b/test/Microsoft.AspNetCore.ResponseCompression.Tests/Microsoft.AspNetCore.ResponseCompression.Tests.csproj
index dd2bbf56c9..1d0877be61 100644
--- a/test/Microsoft.AspNetCore.ResponseCompression.Tests/Microsoft.AspNetCore.ResponseCompression.Tests.csproj
+++ b/test/Microsoft.AspNetCore.ResponseCompression.Tests/Microsoft.AspNetCore.ResponseCompression.Tests.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp1.1;net451</TargetFrameworks>
+    <TargetFrameworks>netcoreapp1.1;net452</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp1.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.ResponseCompression.Tests/ResponseCompressionMiddlewareTest.cs b/test/Microsoft.AspNetCore.ResponseCompression.Tests/ResponseCompressionMiddlewareTest.cs
index 8328716c89..0494896c11 100644
--- a/test/Microsoft.AspNetCore.ResponseCompression.Tests/ResponseCompressionMiddlewareTest.cs
+++ b/test/Microsoft.AspNetCore.ResponseCompression.Tests/ResponseCompressionMiddlewareTest.cs
@@ -505,7 +505,7 @@ namespace Microsoft.AspNetCore.ResponseCompression.Tests
 
             var response = await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
 
-#if NET451 // Flush not supported, compression disabled
+#if NET452 // Flush not supported, compression disabled
             Assert.NotNull(response.Headers.GetValues(HeaderNames.ContentMD5));
             Assert.Empty(response.Content.Headers.ContentEncoding);
 #elif NETCOREAPP1_1 // Flush supported, compression enabled
@@ -570,7 +570,7 @@ namespace Microsoft.AspNetCore.ResponseCompression.Tests
 
             var response = await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
 
-#if NET451 // Flush not supported, compression disabled
+#if NET452 // Flush not supported, compression disabled
             Assert.NotNull(response.Headers.GetValues(HeaderNames.ContentMD5));
             Assert.Empty(response.Content.Headers.ContentEncoding);
 #elif NETCOREAPP1_1 // Flush supported, compression enabled
diff --git a/test/Microsoft.AspNetCore.Rewrite.Tests/Microsoft.AspNetCore.Rewrite.Tests.csproj b/test/Microsoft.AspNetCore.Rewrite.Tests/Microsoft.AspNetCore.Rewrite.Tests.csproj
index 7e008b87f0..ebf1c61363 100644
--- a/test/Microsoft.AspNetCore.Rewrite.Tests/Microsoft.AspNetCore.Rewrite.Tests.csproj
+++ b/test/Microsoft.AspNetCore.Rewrite.Tests/Microsoft.AspNetCore.Rewrite.Tests.csproj
@@ -3,7 +3,8 @@
   <Import Project="..\..\build\common.props" />
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp1.1;net451</TargetFrameworks>
+    <TargetFrameworks>netcoreapp1.1;net452</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp1.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>