diff --git a/ILSpy.Tests/MainWindow/MainWindowTests.cs b/ILSpy.Tests/MainWindow/MainWindowTests.cs
index f3aed5296..cb8fbcefd 100644
--- a/ILSpy.Tests/MainWindow/MainWindowTests.cs
+++ b/ILSpy.Tests/MainWindow/MainWindowTests.cs
@@ -53,7 +53,9 @@ public class MainWindowTests
 
 		// Assert — visible, titled, with the correct DataContext.
 		window.IsVisible.Should().BeTrue();
-		window.Title.Should().Be("ILSpy");
+		// DEBUG builds append the full version (e.g. "ILSpy 11.0.0.x-<branch>-pre") to the
+		// title bar, so match the prefix rather than the exact string.
+		window.Title.Should().StartWith("ILSpy");
 		window.DataContext.Should().BeOfType<MainWindowViewModel>();
 	}
 
diff --git a/ILSpy/ViewModels/MainWindowViewModel.cs b/ILSpy/ViewModels/MainWindowViewModel.cs
index 52cc61c84..15fc761df 100644
--- a/ILSpy/ViewModels/MainWindowViewModel.cs
+++ b/ILSpy/ViewModels/MainWindowViewModel.cs
@@ -44,7 +44,12 @@ namespace ILSpy.ViewModels
 
 		public System.Collections.Generic.IReadOnlyList<ToolPaneMenuItem> ToolPaneMenuItems => DockWorkspace.ToolPaneMenuItems;
 
-		public string Title => "ILSpy";
+		public string Title =>
+#if DEBUG
+			$"ILSpy {DecompilerVersionInfo.FullVersion}";
+#else
+			"ILSpy";
+#endif
 
 		[ImportingConstructor]
 		public MainWindowViewModel(