diff --git a/test/Microsoft.Extensions.FileProviders.Composite.Tests/Microsoft.Extensions.FileProviders.Composite.Tests.csproj b/test/Microsoft.Extensions.FileProviders.Composite.Tests/Microsoft.Extensions.FileProviders.Composite.Tests.csproj
index 069c3e59..e9678328 100644
--- a/test/Microsoft.Extensions.FileProviders.Composite.Tests/Microsoft.Extensions.FileProviders.Composite.Tests.csproj
+++ b/test/Microsoft.Extensions.FileProviders.Composite.Tests/Microsoft.Extensions.FileProviders.Composite.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.Extensions.FileProviders.Embedded.Tests/Microsoft.Extensions.FileProviders.Embedded.Tests.csproj b/test/Microsoft.Extensions.FileProviders.Embedded.Tests/Microsoft.Extensions.FileProviders.Embedded.Tests.csproj
index 1729662f..5664e9d8 100644
--- a/test/Microsoft.Extensions.FileProviders.Embedded.Tests/Microsoft.Extensions.FileProviders.Embedded.Tests.csproj
+++ b/test/Microsoft.Extensions.FileProviders.Embedded.Tests/Microsoft.Extensions.FileProviders.Embedded.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.Extensions.FileProviders.Physical.Tests/Microsoft.Extensions.FileProviders.Physical.Tests.csproj b/test/Microsoft.Extensions.FileProviders.Physical.Tests/Microsoft.Extensions.FileProviders.Physical.Tests.csproj
index c09b0f0a..1cfa4515 100644
--- a/test/Microsoft.Extensions.FileProviders.Physical.Tests/Microsoft.Extensions.FileProviders.Physical.Tests.csproj
+++ b/test/Microsoft.Extensions.FileProviders.Physical.Tests/Microsoft.Extensions.FileProviders.Physical.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.Extensions.FileSystemGlobbing.Tests/Microsoft.Extensions.FileSystemGlobbing.Tests.csproj b/test/Microsoft.Extensions.FileSystemGlobbing.Tests/Microsoft.Extensions.FileSystemGlobbing.Tests.csproj
index 499484b9..b6f956e4 100644
--- a/test/Microsoft.Extensions.FileSystemGlobbing.Tests/Microsoft.Extensions.FileSystemGlobbing.Tests.csproj
+++ b/test/Microsoft.Extensions.FileSystemGlobbing.Tests/Microsoft.Extensions.FileSystemGlobbing.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>