diff --git a/src/Configuration/Config.KeyPerFile/test/Microsoft.Extensions.Configuration.KeyPerFile.Tests.csproj b/src/Configuration/Config.KeyPerFile/test/Microsoft.Extensions.Configuration.KeyPerFile.Tests.csproj
index 634056a345bd..71ed14dff417 100644
--- a/src/Configuration/Config.KeyPerFile/test/Microsoft.Extensions.Configuration.KeyPerFile.Tests.csproj
+++ b/src/Configuration/Config.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 8703c9c508ed..b4c7a3987a9f 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 fe338976031f..9659b189c84d 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 e7a47a1a6e7e..6834de2bd5a0 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 b922cc227e33..c8ba4cf4df10 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/Microsoft.Extensions.Sources.Tests.csproj b/src/Shared/test/Microsoft.Extensions.Sources.Tests.csproj
index 1873e485a974..e3194d66c57e 100644
--- a/src/Shared/test/Microsoft.Extensions.Sources.Tests.csproj
+++ b/src/Shared/test/Microsoft.Extensions.Sources.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 729dc5c61a92..af02c91cdf8e 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>