diff --git a/Directory.Build.props b/Directory.Build.props
index 83968291e7..f2c3825eb7 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,4 +1,8 @@
 <Project>
+  <Import
+    Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), AspNetCoreSettings.props))\AspNetCoreSettings.props"
+    Condition=" '$(CI)' != 'true' AND '$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), AspNetCoreSettings.props))' != '' " />
+
   <Import Project="version.props" />
   <Import Project="build\dependencies.props" />
 
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 45463cc71e..07a4d73a83 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview1-15549
-commithash:f570e08585fec510dd60cd4bfe8795388b757a95
+version:2.1.0-preview1-15564
+commithash:1f3f14382764e06b7e691e5ee89d12a280249284
diff --git a/samples/DatabaseErrorPageSample/DatabaseErrorPageSample.csproj b/samples/DatabaseErrorPageSample/DatabaseErrorPageSample.csproj
index 1b8f6e7fe7..9ddf86922c 100644
--- a/samples/DatabaseErrorPageSample/DatabaseErrorPageSample.csproj
+++ b/samples/DatabaseErrorPageSample/DatabaseErrorPageSample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.0;netcoreapp2.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/samples/DeveloperExceptionPageSample/DeveloperExceptionPageSample.csproj b/samples/DeveloperExceptionPageSample/DeveloperExceptionPageSample.csproj
index bca7f32230..3c9fff2be0 100644
--- a/samples/DeveloperExceptionPageSample/DeveloperExceptionPageSample.csproj
+++ b/samples/DeveloperExceptionPageSample/DeveloperExceptionPageSample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.0;netcoreapp2.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/samples/ElmPageSample/ElmPageSample.csproj b/samples/ElmPageSample/ElmPageSample.csproj
index a60ae67f71..7946494dae 100644
--- a/samples/ElmPageSample/ElmPageSample.csproj
+++ b/samples/ElmPageSample/ElmPageSample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.0;netcoreapp2.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/samples/ExceptionHandlerSample/ExceptionHandlerSample.csproj b/samples/ExceptionHandlerSample/ExceptionHandlerSample.csproj
index 6e75509486..2b7f85b349 100644
--- a/samples/ExceptionHandlerSample/ExceptionHandlerSample.csproj
+++ b/samples/ExceptionHandlerSample/ExceptionHandlerSample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.0;netcoreapp2.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/samples/MiddlewareAnalysisSample/MiddlewareAnalysisSample.csproj b/samples/MiddlewareAnalysisSample/MiddlewareAnalysisSample.csproj
index c5ee1a29fb..b7472cbccc 100644
--- a/samples/MiddlewareAnalysisSample/MiddlewareAnalysisSample.csproj
+++ b/samples/MiddlewareAnalysisSample/MiddlewareAnalysisSample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.0;netcoreapp2.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/samples/StatusCodePagesSample/StatusCodePagesSample.csproj b/samples/StatusCodePagesSample/StatusCodePagesSample.csproj
index bca7f32230..3c9fff2be0 100644
--- a/samples/StatusCodePagesSample/StatusCodePagesSample.csproj
+++ b/samples/StatusCodePagesSample/StatusCodePagesSample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.0;netcoreapp2.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/samples/WelcomePageSample/WelcomePageSample.csproj b/samples/WelcomePageSample/WelcomePageSample.csproj
index bca7f32230..3c9fff2be0 100644
--- a/samples/WelcomePageSample/WelcomePageSample.csproj
+++ b/samples/WelcomePageSample/WelcomePageSample.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFrameworks>net461;netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>net461;netcoreapp2.0;netcoreapp2.1</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Diagnostics.EFCore.FunctionalTests/Diagnostics.EFCore.FunctionalTests.csproj b/test/Diagnostics.EFCore.FunctionalTests/Diagnostics.EFCore.FunctionalTests.csproj
index 8b8d4f77de..de3922cced 100644
--- a/test/Diagnostics.EFCore.FunctionalTests/Diagnostics.EFCore.FunctionalTests.csproj
+++ b/test/Diagnostics.EFCore.FunctionalTests/Diagnostics.EFCore.FunctionalTests.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
     <!-- Mitigation for long path issues -->
     <AssemblyName>Diagnostics.EFCore.FunctionalTests</AssemblyName>
   </PropertyGroup>
diff --git a/test/Diagnostics.FunctionalTests/Diagnostics.FunctionalTests.csproj b/test/Diagnostics.FunctionalTests/Diagnostics.FunctionalTests.csproj
index b831570f24..34524fc4a6 100644
--- a/test/Diagnostics.FunctionalTests/Diagnostics.FunctionalTests.csproj
+++ b/test/Diagnostics.FunctionalTests/Diagnostics.FunctionalTests.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
     <SignAssembly>false</SignAssembly>
     <PublicSign>false</PublicSign>
     <!-- Mitigation for long path issues -->
diff --git a/test/Directory.Build.props b/test/Directory.Build.props
index 4b89a431e7..6ab2251a4a 100644
--- a/test/Directory.Build.props
+++ b/test/Directory.Build.props
@@ -1,6 +1,13 @@
 <Project>
   <Import Project="..\Directory.Build.props" />
 
+  <PropertyGroup>
+    <DeveloperBuildTestTfms>netcoreapp2.1</DeveloperBuildTestTfms>
+    <StandardTestTfms>$(DeveloperBuildTestTfms)</StandardTestTfms>
+    <StandardTestTfms Condition=" '$(DeveloperBuild)' != 'true' ">netcoreapp2.1;netcoreapp2.0</StandardTestTfms>
+    <StandardTestTfms Condition=" '$(DeveloperBuild)' != 'true' AND '$(OS)' == 'Windows_NT' ">$(StandardTestTfms);net461</StandardTestTfms>
+  </PropertyGroup>
+
   <ItemGroup>
     <PackageReference Include="Internal.AspNetCore.Sdk" PrivateAssets="All" Version="$(InternalAspNetCoreSdkPackageVersion)" />
   </ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests.csproj b/test/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests.csproj
index 6e87dbb889..1bafd74701 100644
--- a/test/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests.csproj
+++ b/test/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests/Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore.Tests.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Diagnostics.HealthChecks.Tests/Microsoft.AspNetCore.Diagnostics.HealthChecks.Tests.csproj b/test/Microsoft.AspNetCore.Diagnostics.HealthChecks.Tests/Microsoft.AspNetCore.Diagnostics.HealthChecks.Tests.csproj
index 3173a7363c..001b0c0990 100644
--- a/test/Microsoft.AspNetCore.Diagnostics.HealthChecks.Tests/Microsoft.AspNetCore.Diagnostics.HealthChecks.Tests.csproj
+++ b/test/Microsoft.AspNetCore.Diagnostics.HealthChecks.Tests/Microsoft.AspNetCore.Diagnostics.HealthChecks.Tests.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
     <RootNamespace>Microsoft.AspNetCore.Diagnostics.HealthChecks</RootNamespace>
   </PropertyGroup>
 
diff --git a/test/Microsoft.AspNetCore.Diagnostics.Tests/Microsoft.AspNetCore.Diagnostics.Tests.csproj b/test/Microsoft.AspNetCore.Diagnostics.Tests/Microsoft.AspNetCore.Diagnostics.Tests.csproj
index bd405b6d3c..2e9496869e 100644
--- a/test/Microsoft.AspNetCore.Diagnostics.Tests/Microsoft.AspNetCore.Diagnostics.Tests.csproj
+++ b/test/Microsoft.AspNetCore.Diagnostics.Tests/Microsoft.AspNetCore.Diagnostics.Tests.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.MiddlewareAnalysis.Tests/Microsoft.AspNetCore.MiddlewareAnalysis.Tests.csproj b/test/Microsoft.AspNetCore.MiddlewareAnalysis.Tests/Microsoft.AspNetCore.MiddlewareAnalysis.Tests.csproj
index 438a65b295..f96448c309 100644
--- a/test/Microsoft.AspNetCore.MiddlewareAnalysis.Tests/Microsoft.AspNetCore.MiddlewareAnalysis.Tests.csproj
+++ b/test/Microsoft.AspNetCore.MiddlewareAnalysis.Tests/Microsoft.AspNetCore.MiddlewareAnalysis.Tests.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.Extensions.Diagnostics.HealthChecks.Tests/Microsoft.Extensions.Diagnostics.HealthChecks.Tests.csproj b/test/Microsoft.Extensions.Diagnostics.HealthChecks.Tests/Microsoft.Extensions.Diagnostics.HealthChecks.Tests.csproj
index 3e012be844..9dc8de73e9 100644
--- a/test/Microsoft.Extensions.Diagnostics.HealthChecks.Tests/Microsoft.Extensions.Diagnostics.HealthChecks.Tests.csproj
+++ b/test/Microsoft.Extensions.Diagnostics.HealthChecks.Tests/Microsoft.Extensions.Diagnostics.HealthChecks.Tests.csproj
@@ -1,8 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
-    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
     <RootNamespace>Microsoft.Extensions.Diagnostics.HealthChecks</RootNamespace>
   </PropertyGroup>