Flakiness?

tests/Avalonia.RenderTests/TestBase.cs

@@ -107,7 +107,8 @@ namespace Avalonia.Direct2D1.RenderTests
             
             var timer = new ManualRenderTimer();
 
-            var compositor = new Compositor(new RenderLoop(timer), null, true);
+            var compositor = new Compositor(new RenderLoop(timer), null, true,
+                new DispatcherCompositorScheduler(), true);
             using (var writableBitmap = factory.CreateWriteableBitmap(pixelSize, dpiVector, factory.DefaultPixelFormat, factory.DefaultAlphaFormat))
             {
                 var root = new TestRenderRoot(dpiVector.X / 96, null!);
@@ -121,11 +122,6 @@ namespace Avalonia.Direct2D1.RenderTests
                     Dispatcher.UIThread.RunJobs();
                     timer.TriggerTick();
                 }
-
-                // Free pools
-                for (var c = 0; c < 11; c++)
-                    foreach (var dp in Dispatcher.SnapshotTimersForUnitTests())
-                        dp.ForceFire();
                 writableBitmap.Save(compositedPath);
             }
         }

tests/Avalonia.UnitTests/CompositorTestServices.cs

@@ -45,7 +45,8 @@ public class CompositorTestServices : IDisposable
         {
             AvaloniaLocator.CurrentMutable.Bind<IRenderTimer>().ToConstant(Timer);
 
-            Compositor = new Compositor(new RenderLoop(Timer), null);
+            Compositor = new Compositor(new RenderLoop(Timer), null,
+                true, new DispatcherCompositorScheduler(), true);
             var impl = new TopLevelImpl(Compositor, size ?? new Size(1000, 1000));
             TopLevel = new EmbeddableControlRoot(impl)
             {
@@ -207,4 +208,12 @@ public class NullCompositorScheduler : ICompositorScheduler
     {
         
     }
+}
+
+public class DispatcherCompositorScheduler : ICompositorScheduler
+{
+    public void CommitRequested(Compositor compositor)
+    {
+        Dispatcher.UIThread.Post(() => compositor.Commit(), DispatcherPriority.UiThreadRender);
+    }
 }