Keep DOTNET_ROOT

Author: Youssef1313

test/IntegrationTests/Microsoft.Testing.Platform.Acceptance.IntegrationTests/MSBuildTests.Test.cs

@@ -113,10 +113,7 @@ public async Task RunUsingTestTargetWithNetfxMSBuild()
         var commandLine = new TestInfrastructure.CommandLine();
         string binlogFile = Path.Combine(TempDirectory.TestSuiteDirectory, $"{nameof(RunUsingTestTargetWithNetfxMSBuild)}.binlog");
         await commandLine.RunAsync($"\"{msbuildExe}\" {testAsset.TargetAssetPath} /t:Restore");
-        await commandLine.RunAsync($"\"{msbuildExe}\" {testAsset.TargetAssetPath} /t:\"Build;Test\" /bl:\"{binlogFile}\"", environmentVariables: new Dictionary<string, string?>()
-        {
-            ["DOTNET_ROOT"] = string.Empty,
-        });
+        await commandLine.RunAsync($"\"{msbuildExe}\" {testAsset.TargetAssetPath} /t:\"Build;Test\" /bl:\"{binlogFile}\"");
         StringAssert.Contains(commandLine.StandardOutput, "Tests succeeded");
     }
 
@@ -176,20 +173,9 @@ public async Task Invoke_DotnetTest_With_Incompatible_Arch()
             $"test --arch {incompatibleArchitecture} -p:TestingPlatformDotnetTestSupport=True \"{testAsset.TargetAssetPath}\"",
             AcceptanceFixture.NuGetGlobalPackagesFolder.Path,
             failIfReturnValueIsNotZero: false);
-        // The output looks like:
-        /*
-            D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\tidOn\.packages\microsoft.testing.platform.msbuild\1.5.0-ci\buildMultiTargeting\Microsoft.Testing.Platform.MSBuild.targets(320,5): error : Could not find 'dotnet.exe' host for the 'arm64' architecture. [D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\vf8vR\MSBuildTests\MSBuild Tests.csproj]
-            D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\tidOn\.packages\microsoft.testing.platform.msbuild\1.5.0-ci\buildMultiTargeting\Microsoft.Testing.Platform.MSBuild.targets(320,5): error :  [D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\vf8vR\MSBuildTests\MSBuild Tests.csproj]
-            D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\tidOn\.packages\microsoft.testing.platform.msbuild\1.5.0-ci\buildMultiTargeting\Microsoft.Testing.Platform.MSBuild.targets(320,5): error : You can resolve the problem by installing the 'arm64' .NET. [D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\vf8vR\MSBuildTests\MSBuild Tests.csproj]
-            D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\tidOn\.packages\microsoft.testing.platform.msbuild\1.5.0-ci\buildMultiTargeting\Microsoft.Testing.Platform.MSBuild.targets(320,5): error :  [D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\vf8vR\MSBuildTests\MSBuild Tests.csproj]
-            D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\tidOn\.packages\microsoft.testing.platform.msbuild\1.5.0-ci\buildMultiTargeting\Microsoft.Testing.Platform.MSBuild.targets(320,5): error : The specified framework can be found at: [D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\vf8vR\MSBuildTests\MSBuild Tests.csproj]
-            D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\tidOn\.packages\microsoft.testing.platform.msbuild\1.5.0-ci\buildMultiTargeting\Microsoft.Testing.Platform.MSBuild.targets(320,5): error :   - https://aka.ms/dotnet-download [D:\a\_work\1\s\artifacts\tmp\Debug\testsuite\vf8vR\MSBuildTests\MSBuild Tests.csproj]
-         */
-        // Assert each error line separately for simplicity.
-        result.AssertOutputContains($"Could not find '{(OperatingSystem.IsWindows() ? "dotnet.exe" : "dotnet")}' host for the '{incompatibleArchitecture}' architecture.");
-        result.AssertOutputContains($"You can resolve the problem by installing the '{incompatibleArchitecture}' .NET.");
-        result.AssertOutputContains("The specified framework can be found at:");
-        result.AssertOutputContains("  - https://aka.ms/dotnet-download");
+
+        result.AssertOutputContains("error MSB6003: The specified task executable \"MSBuild Tests.exe\" could not be run. System.ComponentModel.Win32Exception (216): An error occurred trying to start process");
+        result.AssertOutputContains("The specified executable is not a valid application for this OS platform.");
     }
 
     [TestMethod]