diff --git a/src/Microsoft.Android.Sdk.ILLink/Microsoft.Android.Sdk.ILLink.csproj b/src/Microsoft.Android.Sdk.ILLink/Microsoft.Android.Sdk.ILLink.csproj
index ba08c1f2bb8..de1051930e3 100644
--- a/src/Microsoft.Android.Sdk.ILLink/Microsoft.Android.Sdk.ILLink.csproj
+++ b/src/Microsoft.Android.Sdk.ILLink/Microsoft.Android.Sdk.ILLink.csproj
@@ -5,6 +5,7 @@
     <DefineConstants>ILLINK</DefineConstants>
     <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
     <OutputPath>$(MicrosoftAndroidSdkOutDir)</OutputPath>
+    <Nullable>annotations</Nullable>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.ILLink" Version="$(MicrosoftNETILLinkTasksPackageVersion)" />
diff --git a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Xamarin.Android.Build.Tests.csproj b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Xamarin.Android.Build.Tests.csproj
index 749318c47ab..3e752c6992d 100644
--- a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Xamarin.Android.Build.Tests.csproj
+++ b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Xamarin.Android.Build.Tests.csproj
@@ -9,6 +9,7 @@
     <DebugSymbols>True</DebugSymbols>
     <DebugType>portable</DebugType>
     <NoWarn>$(NoWarn);CA1305</NoWarn>
+    <Nullable>annotations</Nullable>
   </PropertyGroup>
 
   <Import Project="..\..\..\..\Configuration.props" />
diff --git a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Xamarin.ProjectTools.csproj b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Xamarin.ProjectTools.csproj
index 2482944cc97..5109e4beef7 100644
--- a/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Xamarin.ProjectTools.csproj
+++ b/src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Xamarin.ProjectTools.csproj
@@ -8,6 +8,7 @@
     <AssemblyOriginatorKeyFile>..\..\..\..\product.snk</AssemblyOriginatorKeyFile>
     <NoWarn>$(NoWarn);CA1305</NoWarn>
     <_IncludeMicrosoftBuildPackage>true</_IncludeMicrosoftBuildPackage>
+    <Nullable>annotations</Nullable>
   </PropertyGroup>
   <Import Project="..\..\..\..\Configuration.props" />
   <Import Project="..\..\..\..\external\xamarin-android-tools\src\Microsoft.Android.Build.BaseTasks\MSBuildReferences.projitems" />
diff --git a/tests/MSBuildDeviceIntegration/MSBuildDeviceIntegration.csproj b/tests/MSBuildDeviceIntegration/MSBuildDeviceIntegration.csproj
index 406eb288e40..8296250116f 100644
--- a/tests/MSBuildDeviceIntegration/MSBuildDeviceIntegration.csproj
+++ b/tests/MSBuildDeviceIntegration/MSBuildDeviceIntegration.csproj
@@ -9,6 +9,7 @@
     <AssemblyOriginatorKeyFile>..\..\product.snk</AssemblyOriginatorKeyFile>
     <DebugSymbols>True</DebugSymbols>
     <DebugType>portable</DebugType>
+    <Nullable>annotations</Nullable>
   </PropertyGroup>
 
   <Import Project="..\..\Configuration.props" />