diff --git a/src/Microsoft.AspNetCore.Mvc.WebApiCompatShim/Microsoft.AspNetCore.Mvc.WebApiCompatShim.csproj b/src/Microsoft.AspNetCore.Mvc.WebApiCompatShim/Microsoft.AspNetCore.Mvc.WebApiCompatShim.csproj
index 9767587b7e..d433dc4daa 100644
--- a/src/Microsoft.AspNetCore.Mvc.WebApiCompatShim/Microsoft.AspNetCore.Mvc.WebApiCompatShim.csproj
+++ b/src/Microsoft.AspNetCore.Mvc.WebApiCompatShim/Microsoft.AspNetCore.Mvc.WebApiCompatShim.csproj
@@ -11,6 +11,7 @@ System.Web.Http.ApiController</Description>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <PackageTags>aspnetcore;aspnetcoremvc;aspnetwebapi</PackageTags>
     <PackageTargetFallback>$(PackageTargetFallback);portable-net451+win8</PackageTargetFallback>
+    <DisableImplicitAssetTargetFallback>true</DisableImplicitAssetTargetFallback>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/Microsoft.AspNetCore.Mvc.FunctionalTests/Microsoft.AspNetCore.Mvc.FunctionalTests.csproj b/test/Microsoft.AspNetCore.Mvc.FunctionalTests/Microsoft.AspNetCore.Mvc.FunctionalTests.csproj
index e82788695f..86ebaa991b 100644
--- a/test/Microsoft.AspNetCore.Mvc.FunctionalTests/Microsoft.AspNetCore.Mvc.FunctionalTests.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.FunctionalTests/Microsoft.AspNetCore.Mvc.FunctionalTests.csproj
@@ -5,6 +5,7 @@
     <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp2.0' ">$(PackageTargetFallback);portable-net451+win8</PackageTargetFallback>
+    <DisableImplicitAssetTargetFallback>true</DisableImplicitAssetTargetFallback>
 
     <DefineConstants Condition="'$(GenerateBaselines)'=='true'">$(DefineConstants);GENERATE_BASELINES</DefineConstants>
     <DefineConstants>$(DefineConstants);__RemoveThisBitTo__GENERATE_BASELINES</DefineConstants>
diff --git a/test/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest.csproj b/test/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest.csproj
index a0ed489f22..31c20cff7e 100644
--- a/test/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest.csproj
+++ b/test/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest/Microsoft.AspNetCore.Mvc.WebApiCompatShimTest.csproj
@@ -6,6 +6,7 @@
     <TargetFrameworks>netcoreapp2.0</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
     <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp2.0' ">$(PackageTargetFallback);portable-net451+win8</PackageTargetFallback>
+    <DisableImplicitAssetTargetFallback>true</DisableImplicitAssetTargetFallback>
     <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
   </PropertyGroup>
diff --git a/test/WebSites/WebApiCompatShimWebSite/WebApiCompatShimWebSite.csproj b/test/WebSites/WebApiCompatShimWebSite/WebApiCompatShimWebSite.csproj
index 9f77abdfbe..ea542c51f0 100644
--- a/test/WebSites/WebApiCompatShimWebSite/WebApiCompatShimWebSite.csproj
+++ b/test/WebSites/WebApiCompatShimWebSite/WebApiCompatShimWebSite.csproj
@@ -4,7 +4,8 @@
   <PropertyGroup>
     <TargetFrameworks>netcoreapp2.0;net461</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">netcoreapp2.0</TargetFrameworks>
-    <PackageTargetFallback>$(PackageTargetFallback);portable-net451+win8</PackageTargetFallback>
+    <PackageTargetFallback Condition=" '$(TargetFramework)' == 'netcoreapp2.0' ">$(PackageTargetFallback);portable-net451+win8</PackageTargetFallback>
+    <DisableImplicitAssetTargetFallback>true</DisableImplicitAssetTargetFallback>
   </PropertyGroup>
 
   <ItemGroup>