diff --git a/tests/Avalonia.RenderTests/TestBase.cs b/tests/Avalonia.RenderTests/TestBase.cs
index 1e2443aff8..a0fbf704cf 100644
--- a/tests/Avalonia.RenderTests/TestBase.cs
+++ b/tests/Avalonia.RenderTests/TestBase.cs
@@ -184,7 +184,7 @@ namespace Avalonia.Direct2D1.RenderTests
 
             public void Signal(DispatcherPriority prio)
             {
-                throw new NotImplementedException();
+                // No-op
             }
 
             public IDisposable StartTimer(DispatcherPriority priority, TimeSpan interval, Action tick)