Try resetting the toolset framework env variable

Try removing windowsforms from the not expected reference names

Author: marcpopMSFT

test/Microsoft.NET.Build.Tests/GivenFrameworkReferences.cs

@@ -887,7 +887,7 @@ public void WindowsFormsFrameworkReference(bool selfContained)
             TestFrameworkReferenceProfiles(
                 frameworkReferences: new[] { "Microsoft.WindowsDesktop.App.WindowsForms" },
                 expectedReferenceNames: new[] { "Microsoft.Win32.Registry", "System.Windows.Forms" },
-                notExpectedReferenceNames: new[] { "WindowsFormsIntegration" },
+                notExpectedReferenceNames: Enumerable.Empty<string>(),
                 selfContained);
         }
 
@@ -899,7 +899,7 @@ public void WPFFrameworkReference(bool selfContained)
             TestFrameworkReferenceProfiles(
                 frameworkReferences: new[] { "Microsoft.WindowsDesktop.App.WPF" },
                 expectedReferenceNames: new[] { "Microsoft.Win32.Registry", "System.Windows.Presentation" },
-                notExpectedReferenceNames: new[] { "WindowsFormsIntegration" },
+                notExpectedReferenceNames: Enumerable.Empty<string>(),
                 selfContained);
         }
 
@@ -911,7 +911,7 @@ public void WindowsFormAndWPFFrameworkReference(bool selfContained)
             TestFrameworkReferenceProfiles(
                 frameworkReferences: new[] { "Microsoft.WindowsDesktop.App.WindowsForms", "Microsoft.WindowsDesktop.App.WPF" },
                 expectedReferenceNames: new[] { "Microsoft.Win32.Registry", "System.Windows.Forms", "System.Windows.Presentation" },
-                notExpectedReferenceNames: new[] { "WindowsFormsIntegration" },
+                notExpectedReferenceNames: Enumerable.Empty<string>(),
                 selfContained);
         }
 

test/Microsoft.NET.Restore.Tests/GivenThatWeWantToUseFrameworkRoslyn.cs

@@ -65,7 +65,8 @@ public void It_downloads_Microsoft_Net_Compilers_Toolset_Framework_when_MSBuild_
             var customPackagesDir = Path.Combine(testAsset.Path, "nuget-packages");
 
             testAsset.GetRestoreCommand(Log, relativePath: testProjectName)
-                .WithEnvironmentVariable("NUGET_PACKAGES", customPackagesDir)
+                .WithEnvironmentVariable("NUGET_PACKAGES", "")
+                .WithEnvironmentVariable("BuildWithNetFrameworkHostedCompiler", customPackagesDir)
                 .Execute().Should().Pass();
 
             var toolsetPackageDir = Path.Combine(customPackagesDir, "microsoft.net.sdk.compilers.toolset");
@@ -76,6 +77,7 @@ public void It_downloads_Microsoft_Net_Compilers_Toolset_Framework_when_MSBuild_
 
             new BuildCommand(testAsset)
                 .WithEnvironmentVariable("NUGET_PACKAGES", customPackagesDir)
+                .WithEnvironmentVariable("BuildWithNetFrameworkHostedCompiler", "")
                 .Execute().Should().Pass().And
                 .HaveStdOutContaining(Path.Combine(toolsetPackageDir, toolsetPackageVersion, "csc.exe") + " /noconfig");
         }