diff --git a/src/Configuration.KeyPerFile/test/Microsoft.Extensions.Configuration.KeyPerFile.Tests.csproj b/src/Configuration.KeyPerFile/test/Microsoft.Extensions.Configuration.KeyPerFile.Tests.csproj
index 634056a345..71ed14dff4 100644
--- a/src/Configuration.KeyPerFile/test/Microsoft.Extensions.Configuration.KeyPerFile.Tests.csproj
+++ b/src/Configuration.KeyPerFile/test/Microsoft.Extensions.Configuration.KeyPerFile.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/FileProviders/Embedded/test/Microsoft.Extensions.FileProviders.Embedded.Tests.csproj b/src/FileProviders/Embedded/test/Microsoft.Extensions.FileProviders.Embedded.Tests.csproj
index 8703c9c508..b4c7a3987a 100644
--- a/src/FileProviders/Embedded/test/Microsoft.Extensions.FileProviders.Embedded.Tests.csproj
+++ b/src/FileProviders/Embedded/test/Microsoft.Extensions.FileProviders.Embedded.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/FileProviders/Manifest.MSBuildTask/test/Microsoft.Extensions.FileProviders.Embedded.Manifest.Task.Test.csproj b/src/FileProviders/Manifest.MSBuildTask/test/Microsoft.Extensions.FileProviders.Embedded.Manifest.Task.Test.csproj
index fe33897603..9659b189c8 100644
--- a/src/FileProviders/Manifest.MSBuildTask/test/Microsoft.Extensions.FileProviders.Embedded.Manifest.Task.Test.csproj
+++ b/src/FileProviders/Manifest.MSBuildTask/test/Microsoft.Extensions.FileProviders.Embedded.Manifest.Task.Test.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Localization/Localization/test/Microsoft.Extensions.Localization.Tests.csproj b/src/Localization/Localization/test/Microsoft.Extensions.Localization.Tests.csproj
index e7a47a1a6e..6834de2bd5 100644
--- a/src/Localization/Localization/test/Microsoft.Extensions.Localization.Tests.csproj
+++ b/src/Localization/Localization/test/Microsoft.Extensions.Localization.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/ObjectPool/test/Microsoft.Extensions.ObjectPool.Tests.csproj b/src/ObjectPool/test/Microsoft.Extensions.ObjectPool.Tests.csproj
index b922cc227e..c8ba4cf4df 100644
--- a/src/ObjectPool/test/Microsoft.Extensions.ObjectPool.Tests.csproj
+++ b/src/ObjectPool/test/Microsoft.Extensions.ObjectPool.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/src/Shared/test/Shared.Tests/Microsoft.AspNetCore.Shared.Tests.csproj b/src/Shared/test/Shared.Tests/Microsoft.AspNetCore.Shared.Tests.csproj
index 1873e485a9..e3194d66c5 100644
--- a/src/Shared/test/Shared.Tests/Microsoft.AspNetCore.Shared.Tests.csproj
+++ b/src/Shared/test/Shared.Tests/Microsoft.AspNetCore.Shared.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 
diff --git a/src/WebEncoders/test/Microsoft.Extensions.WebEncoders.Tests.csproj b/src/WebEncoders/test/Microsoft.Extensions.WebEncoders.Tests.csproj
index 729dc5c61a..af02c91cdf 100755
--- a/src/WebEncoders/test/Microsoft.Extensions.WebEncoders.Tests.csproj
+++ b/src/WebEncoders/test/Microsoft.Extensions.WebEncoders.Tests.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>$(StandardTestTfms)</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1;net461</TargetFrameworks>
   </PropertyGroup>
 
   <ItemGroup>