Let's try to see what's going on there...

Author: grendello

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/BuildTest2.cs

@@ -42,7 +42,7 @@ public partial class BuildTest2 : BaseTest
 		[TestCaseSource (nameof (MarshalMethodsDefaultStatusSource))]
 		public void MarshalMethodsDefaultEnabledStatus (bool isRelease, bool marshalMethodsEnabled)
 		{
-			var abis = new [] { "armeabi-v7a", "x86" };
+			var abis = new [] { "am64-v8a", "x86_64" };
 			AndroidTargetArch[] supportedArches = new [] {
 				AndroidTargetArch.Arm,
 				AndroidTargetArch.X86,

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/PackagingTest.cs

@@ -177,7 +177,7 @@ public void CheckIncludedNativeLibraries ([Values (true, false)] bool compressNa
 				IsRelease = true,
 			};
 			proj.PackageReferences.Add(KnownPackages.SQLitePCLRaw_Core);
-			proj.SetRuntimeIdentifier ("android-x64");
+			proj.SetAndroidSupportedAbis ("x86_64");
 			proj.SetProperty (proj.ReleaseProperties, "AndroidStoreUncompressedFileExtensions", compressNativeLibraries ? "" : "so");
 			using (var b = CreateApkBuilder ()) {
 				b.ThrowOnBuildFailure = false;

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.ProjectTools/Common/TestEnvironment.cs

@@ -143,7 +143,10 @@ orderby version descending
 		/// </summary>
 		public static bool UseLocalBuildOutput {
 			get {
+				Console.WriteLine ($"UseLocalBuildOutput: local sdk dir == '{LocalDotNetAndroidSdkDirectory}'");
 				var msbuildDir = Path.Combine (LocalDotNetAndroidSdkDirectory, "tools");
+				bool tasksExist = File.Exists (Path.Combine (msbuildDir, "Xamarin.Android.Build.Tasks.dll"));
+				Console.WriteLine ($"UseLocalBuildOutput: msbuild dir == '{msbuildDir}' (tasks exist? {tasksExist})");
 				return Directory.Exists (msbuildDir) && File.Exists (Path.Combine (msbuildDir, "Xamarin.Android.Build.Tasks.dll"));
 			}
 		}
@@ -176,4 +179,3 @@ static Version ParseVersion (string path)
 		public static bool IsUsingJdk11 => AndroidSdkResolver.GetJavaSdkVersionString ().Contains ("11.0");
 	}
 }
-