diff --git a/src/System.Windows.Forms.Design/src/System/Windows/Forms/Design/StandardMenuStripVerb.cs b/src/System.Windows.Forms.Design/src/System/Windows/Forms/Design/StandardMenuStripVerb.cs
index 1cfdc63350f..993a7fffe0b 100644
--- a/src/System.Windows.Forms.Design/src/System/Windows/Forms/Design/StandardMenuStripVerb.cs
+++ b/src/System.Windows.Forms.Design/src/System/Windows/Forms/Design/StandardMenuStripVerb.cs
@@ -27,9 +27,8 @@ internal class StandardMenuStripVerb
     /// </summary>
     internal StandardMenuStripVerb(ToolStripDesigner designer)
     {
-        Debug.Assert(designer is not null, "Can't have a StandardMenuStripVerb without an associated designer");
-        _designer = designer;
-        _provider = designer.Component.Site;
+        _designer = designer.OrThrowIfNull();
+        _provider = designer.Component.Site.OrThrowIfNull();
         _host = (IDesignerHost)_provider.GetService(typeof(IDesignerHost));
         _changeService = (IComponentChangeService)_provider.GetService(typeof(IComponentChangeService));
     }
diff --git a/src/System.Windows.Forms.Design/tests/UnitTests/System/Windows/Forms/Design/StandardMenuStripVerbTests.cs b/src/System.Windows.Forms.Design/tests/UnitTests/System/Windows/Forms/Design/StandardMenuStripVerbTests.cs
new file mode 100644
index 00000000000..d38ef325909
--- /dev/null
+++ b/src/System.Windows.Forms.Design/tests/UnitTests/System/Windows/Forms/Design/StandardMenuStripVerbTests.cs
@@ -0,0 +1,148 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.ComponentModel;
+using System.ComponentModel.Design;
+using System.ComponentModel.Design.Serialization;
+using System.Windows.Forms.Design.Behavior;
+using Moq;
+
+namespace System.Windows.Forms.Design.Tests;
+public class StandardMenuStripVerbTests : IDisposable
+{
+    private readonly Mock<IDesignerHost> _designerHostMock = new();
+    private readonly Mock<IServiceProvider> _serviceProviderMock = new();
+    private readonly Mock<ISelectionService> _selectionServiceMock = new();
+    private readonly Mock<IComponentChangeService> _componentChangeServiceMock = new();
+    private readonly Mock<ISite> _siteMock = new();
+    private readonly Mock<DesignerTransaction> _mockTransaction = new(MockBehavior.Loose);
+
+    private readonly DesignerFrame _designerFrame;
+    private readonly SelectionManager _selectionManager;
+    private readonly BehaviorService _behaviorService;
+    private readonly DesignerActionUIService _designerActionUIService;
+
+    private readonly ToolStripDesigner _designer = new();
+    private readonly ParentControlDesigner _parentControlDesigner = new();
+    private readonly MenuStrip _menuStrip = new();
+
+    public StandardMenuStripVerbTests()
+    {
+        _siteMock.Setup(s => s.GetService(typeof(INestedContainer))).Returns(new Mock<IContainer>().Object);
+        _siteMock.Setup(s => s.Container).Returns(new Mock<ServiceContainer>().Object as IContainer);
+        _siteMock.Setup(s => s.GetService(typeof(UndoEngine))).Returns(null!);
+        _siteMock.Setup(s => s.GetService(typeof(IDesignerHost))).Returns(_designerHostMock.Object);
+        _siteMock.Setup(s => s.GetService(typeof(IComponentChangeService))).Returns(_componentChangeServiceMock.Object);
+
+        _designerFrame = new(_siteMock.Object);
+        _behaviorService = new(_serviceProviderMock.Object, _designerFrame);
+        _siteMock.Setup(s => s.GetService(typeof(BehaviorService))).Returns(_behaviorService);
+        _siteMock.Setup(s => s.GetService(typeof(ToolStripAdornerWindowService))).Returns(null!);
+        _siteMock.Setup(s => s.GetService(typeof(DesignerActionService))).Returns(new Mock<DesignerActionService>(_siteMock.Object).Object);
+
+        Mock<INameCreationService> nameCreationServiceMock = new();
+        nameCreationServiceMock.Setup(n => n.IsValidName(It.IsAny<string>())).Returns(true);
+        _siteMock.Setup(s => s.GetService(typeof(INameCreationService))).Returns(nameCreationServiceMock.Object);
+        _designerActionUIService = new(_siteMock.Object);
+        _siteMock.Setup(s => s.GetService(typeof(DesignerActionUIService))).Returns(_designerActionUIService);
+
+        _serviceProviderMock.Setup(s => s.GetService(typeof(IDesignerHost))).Returns(_designerHostMock.Object);
+        _serviceProviderMock.Setup(s => s.GetService(typeof(IComponentChangeService))).Returns(new Mock<IComponentChangeService>().Object);
+
+        _designerHostMock.Setup(h => h.RootComponent).Returns(_menuStrip);
+        _designerHostMock.Setup(h => h.CreateTransaction(It.IsAny<string>())).Returns(_mockTransaction.Object);
+        _designerHostMock.Setup(h => h.GetService(typeof(IComponentChangeService))).Returns(_componentChangeServiceMock.Object);
+        _designerHostMock.Setup(h => h.AddService(typeof(ToolStripKeyboardHandlingService), It.IsAny<object>()));
+        _designerHostMock.Setup(h => h.AddService(typeof(ISupportInSituService), It.IsAny<object>()));
+        _designerHostMock.Setup(h => h.AddService(typeof(DesignerActionService), It.IsAny<object>()));
+        _designerHostMock.Setup(h => h.GetDesigner(_menuStrip)).Returns(_parentControlDesigner);
+        _designerHostMock.Setup(h => h.AddService(typeof(DesignerActionUIService), It.IsAny<object>()));
+        Mock<ToolStripMenuItem> toolStripMenuItemMock = new();
+        using ToolStripDropDownMenu toolStripDropDownMenu = new();
+        toolStripMenuItemMock.Object.DropDown = toolStripDropDownMenu;
+
+        string[] menuItemImageNames =
+        [
+            "file", "new", "open", "save", "saveAs", "print", "printPreview", "cut", "copy", "paste", "undo", "redo",
+            "delete", "selectAll", "edit", "exit", "saveAs", "saveAll", "tool", "tools", "customize", "options", "help",
+            "contents", "index", "search", "about", "cut", "copy", "Paste", "undo", "redo"
+        ];
+
+        foreach (string item in menuItemImageNames)
+        {
+            _designerHostMock.Setup(h => h.CreateComponent(typeof(ToolStripMenuItem), item + "ToolStripMenuItem")).Returns(toolStripMenuItemMock.Object);
+        }
+
+        _designerHostMock.Setup(h => h.CreateComponent(typeof(ToolStripSeparator), "toolStripSeparator")).Returns(new Mock<ToolStripSeparator>().Object);
+        _selectionServiceMock.Setup(s => s.GetComponentSelected(_menuStrip)).Returns(true);
+        _siteMock.Setup(s => s.GetService(typeof(ISelectionService))).Returns(_selectionServiceMock.Object);
+        _designerHostMock.Setup(h => h.AddService(typeof(ISelectionService), _selectionServiceMock.Object));
+        _serviceProviderMock.Setup(s => s.GetService(typeof(ISelectionService))).Returns(_selectionServiceMock.Object);
+        _selectionManager = new(_serviceProviderMock.Object, _behaviorService!);
+        _siteMock.Setup(s => s.GetService(typeof(SelectionManager))).Returns(_selectionManager);
+
+        _menuStrip.Site = _siteMock.Object;
+
+        _designer.Initialize(_menuStrip);
+        _parentControlDesigner.Initialize(_menuStrip);
+
+        IComponent[] components = [];
+        ComponentCollection componentCollection = new(components);
+        _selectionServiceMock.Setup(s => s.GetSelectedComponents()).Returns(components);
+
+        Mock<IContainer> containerMock = new();
+        containerMock.Setup(c => c.Components).Returns(componentCollection);
+        _designerHostMock.Setup(d => d.Container).Returns(containerMock.Object);
+    }
+
+    public void Dispose()
+    {
+        _menuStrip?.Dispose();
+        _parentControlDesigner.Dispose();
+        _behaviorService?.Dispose();
+        _selectionManager?.Dispose();
+        _designerFrame.Dispose();
+        _designer.Dispose();
+    }
+
+    [WinFormsFact]
+    public void StandardMenuStripVerb_Ctor()
+    {
+        StandardMenuStripVerb standardMenuStripVerb = new(_designer);
+        standardMenuStripVerb.Should().BeOfType<StandardMenuStripVerb>();
+        ToolStripDesigner toolStripDesigner = standardMenuStripVerb.TestAccessor().Dynamic._designer;
+        toolStripDesigner.Should().Be(_designer);
+    }
+
+    [WinFormsFact]
+    public void Ctor_ThrowsIfDesignerIsNull()
+    {
+        Action action = () => new StandardMenuStripVerb(null);
+        action.Should().Throw<ArgumentNullException>();
+    }
+
+    [WinFormsFact]
+    public void Ctor_ThrowsIfComponentOrSiteIsNull()
+    {
+        Action action = () =>
+        {
+            ToolStripDesigner toolStripDesigner = new();
+            toolStripDesigner.Initialize(new MenuStrip());
+
+            new StandardMenuStripVerb(toolStripDesigner);
+        };
+
+        action.Should().Throw<InvalidOperationException>();
+    }
+
+    [WinFormsFact]
+    public void Ctor_AssignsHostAndChangeServiceIfAvailable()
+    {
+        StandardMenuStripVerb standardMenuStripVerb = new(_designer);
+        IDesignerHost host = standardMenuStripVerb.TestAccessor().Dynamic._host;
+        IComponentChangeService changeService = standardMenuStripVerb.TestAccessor().Dynamic._changeService;
+
+        host.Should().BeSameAs(_designerHostMock.Object);
+        changeService.Should().BeSameAs(_componentChangeServiceMock.Object);
+    }
+}