diff --git a/Src/Support/Google.Apis.Auth.Tests/Google.Apis.Auth.Tests.csproj b/Src/Support/Google.Apis.Auth.Tests/Google.Apis.Auth.Tests.csproj
index 7eaa61919c..3bf0252d08 100644
--- a/Src/Support/Google.Apis.Auth.Tests/Google.Apis.Auth.Tests.csproj
+++ b/Src/Support/Google.Apis.Auth.Tests/Google.Apis.Auth.Tests.csproj
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net462;net6.0</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">net6.0</TargetFrameworks>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\..\google.apis.snk</AssemblyOriginatorKeyFile>
     <IsPackable>false</IsPackable>
diff --git a/Src/Support/Google.Apis.IntegrationTests/Google.Apis.IntegrationTests.csproj b/Src/Support/Google.Apis.IntegrationTests/Google.Apis.IntegrationTests.csproj
index 75cf05a97e..e29672f00b 100644
--- a/Src/Support/Google.Apis.IntegrationTests/Google.Apis.IntegrationTests.csproj
+++ b/Src/Support/Google.Apis.IntegrationTests/Google.Apis.IntegrationTests.csproj
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net462;net6.0</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">net6.0</TargetFrameworks>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\..\google.apis.snk</AssemblyOriginatorKeyFile>
     <IsPackable>false</IsPackable>
diff --git a/Src/Support/Google.Apis.Tests/Google.Apis.Tests.csproj b/Src/Support/Google.Apis.Tests/Google.Apis.Tests.csproj
index ac9b038aa0..2d6548c3e4 100644
--- a/Src/Support/Google.Apis.Tests/Google.Apis.Tests.csproj
+++ b/Src/Support/Google.Apis.Tests/Google.Apis.Tests.csproj
@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net462;net6.0</TargetFrameworks>
+    <TargetFrameworks Condition=" '$(OS)' != 'Windows_NT' ">net6.0</TargetFrameworks>
     <SignAssembly>true</SignAssembly>
     <AssemblyOriginatorKeyFile>..\..\..\google.apis.snk</AssemblyOriginatorKeyFile>
     <IsPackable>false</IsPackable>