diff --git a/build/common.project.props b/build/common.project.props
index ff77e947b9f..622fcbd6d77 100644
--- a/build/common.project.props
+++ b/build/common.project.props
@@ -50,7 +50,7 @@
     <MicroBuildDirectory>$(SolutionPackagesFolder)microsoft.visualstudioeng.microbuild.core\1.0.0\build\</MicroBuildDirectory>
     <MicrosoftDotNetBuildTasksFeedFilePath>$(SolutionPackagesFolder)microsoft.dotnet.build.tasks.feed\6.0.0-beta.20528.5\tools\netcoreapp2.1\Microsoft.DotNet.Build.Tasks.Feed.dll</MicrosoftDotNetBuildTasksFeedFilePath>
     <MicrosoftDotNetMaestroTasksFilePath>$(SolutionPackagesFolder)microsoft.dotnet.maestro.tasks\1.1.0-beta.21378.2\tools\netcoreapp3.1\Microsoft.DotNet.Maestro.Tasks.dll</MicrosoftDotNetMaestroTasksFilePath>
-    <NoWarn>$(NoWarn);NU5105;MSB3277</NoWarn>
+    <NoWarn>$(NoWarn);NU5105;MSB3277;NETSDK1138</NoWarn>
     <!-- additional warnings new in .NET 6 that we need to disable when building with source-build -->
     <NoWarn Condition="'$(DotNetBuildFromSource)' == 'true'">$(NoWarn);CS1998;CA1416;CS0618;CS1574</NoWarn>
   </PropertyGroup>
diff --git a/test/NuGet.Core.Tests/NuGet.Packaging.Test/NuGet.Packaging.Test.csproj b/test/NuGet.Core.Tests/NuGet.Packaging.Test/NuGet.Packaging.Test.csproj
index 5347e91f1ee..4e0a5934323 100644
--- a/test/NuGet.Core.Tests/NuGet.Packaging.Test/NuGet.Packaging.Test.csproj
+++ b/test/NuGet.Core.Tests/NuGet.Packaging.Test/NuGet.Packaging.Test.csproj
@@ -7,7 +7,7 @@
     <UseParallelXunit>true</UseParallelXunit>
     <Description>Unit tests for NuGet.Packaging.</Description>
     <!-- remove warnings for obsolete types and methods: SYSLIB0023: RNGCryptoServiceProvider, SYSLIB0026: X509Certificate2() blank constructor -->
-    <NoWarn>SYSLIB0023;SYSLIB0026</NoWarn>
+    <NoWarn>$(NoWarn);SYSLIB0023;SYSLIB0026</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/TestExtensions/GenerateLicenseList/GenerateLicenseList.csproj b/test/TestExtensions/GenerateLicenseList/GenerateLicenseList.csproj
index d179f494492..989c8b1258e 100644
--- a/test/TestExtensions/GenerateLicenseList/GenerateLicenseList.csproj
+++ b/test/TestExtensions/GenerateLicenseList/GenerateLicenseList.csproj
@@ -7,7 +7,7 @@
     <OutputType>Exe</OutputType>
     <TargetFramework>net5.0</TargetFramework>
     <AssemblyName>GenerateLicenseList</AssemblyName>
-    <NoWarn>NU1505</NoWarn> <!-- Remove NoWarn when https://github.com/dotnet/sdk/issues/24747 is fixed -->
+    <NoWarn>$(NoWarn);NU1505</NoWarn> <!-- Remove NoWarn when https://github.com/dotnet/sdk/issues/24747 is fixed -->
     <Description>A utility for updating the NuGet license list from the SPDX source.</Description>
   </PropertyGroup>