Index: Core/Common/src/Core.Common.Gui/Forms/ProgressDialog/ActivityProgressDialog.cs
===================================================================
diff -u -r49c5da81f49a23dd6e66526d264a08bf510e6963 -rb995146e05c59a90ab32d316c3cf62cd5b31159e
--- Core/Common/src/Core.Common.Gui/Forms/ProgressDialog/ActivityProgressDialog.cs	(.../ActivityProgressDialog.cs)	(revision 49c5da81f49a23dd6e66526d264a08bf510e6963)
+++ Core/Common/src/Core.Common.Gui/Forms/ProgressDialog/ActivityProgressDialog.cs	(.../ActivityProgressDialog.cs)	(revision b995146e05c59a90ab32d316c3cf62cd5b31159e)
@@ -54,6 +54,8 @@
         {
             InitializeComponent();
 
+            MinimizeBox = true; // Allows for minimizing the dialog parent in case of long-lasting activities
+
             this.activities = activities ?? Enumerable.Empty<Activity>();
         }
 
Index: Core/Common/test/Core.Common.Gui.Test/Core.Common.Gui.Test.csproj
===================================================================
diff -u -r2d5e2d09b0cb1a7f48e1b0a067d332347c89d4a8 -rb995146e05c59a90ab32d316c3cf62cd5b31159e
--- Core/Common/test/Core.Common.Gui.Test/Core.Common.Gui.Test.csproj	(.../Core.Common.Gui.Test.csproj)	(revision 2d5e2d09b0cb1a7f48e1b0a067d332347c89d4a8)
+++ Core/Common/test/Core.Common.Gui.Test/Core.Common.Gui.Test.csproj	(.../Core.Common.Gui.Test.csproj)	(revision b995146e05c59a90ab32d316c3cf62cd5b31159e)
@@ -100,6 +100,7 @@
     <Compile Include="Forms\MessageWindow\MessageWindowDialogTest.cs" />
     <Compile Include="Forms\MessageWindow\MessageWindowLogAppenderTest.cs" />
     <Compile Include="Forms\MessageWindow\MessageWindowTest.cs" />
+    <Compile Include="Forms\ProgressDialog\ActivityProgressDialogTest.cs" />
     <Compile Include="Forms\PropertyGridView\PropertyResolverTest.cs" />
     <Compile Include="Forms\RichTextFileTest.cs" />
     <Compile Include="Forms\RichTextViewTest.cs" />
Index: Core/Common/test/Core.Common.Gui.Test/Forms/ProgressDialog/ActivityProgressDialogTest.cs
===================================================================
diff -u
--- Core/Common/test/Core.Common.Gui.Test/Forms/ProgressDialog/ActivityProgressDialogTest.cs	(revision 0)
+++ Core/Common/test/Core.Common.Gui.Test/Forms/ProgressDialog/ActivityProgressDialogTest.cs	(revision b995146e05c59a90ab32d316c3cf62cd5b31159e)
@@ -0,0 +1,63 @@
+// Copyright (C) Stichting Deltares 2016. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Windows.Forms;
+using Core.Common.Base.Service;
+using Core.Common.Controls.Dialogs;
+using Core.Common.Gui.Forms.ProgressDialog;
+using NUnit.Framework;
+using Rhino.Mocks;
+
+namespace Core.Common.Gui.Test.Forms.ProgressDialog
+{
+    [TestFixture]
+    public class ActivityProgressDialogTest
+    {
+        [SetUp]
+        public void SetUp()
+        {
+            SynchronizationContext.SetSynchronizationContext(new SynchronizationContext()); 
+        }
+
+        [Test]
+        public void Constructor_ExpectedValues()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var window = mocks.Stub<IWin32Window>();
+
+            mocks.ReplayAll();
+
+            // Call
+            using (var dialog = new ActivityProgressDialog(window, Enumerable.Empty<Activity>()))
+            {
+                // Assert
+                Assert.IsInstanceOf<DialogBase>(dialog);
+                Assert.IsTrue(dialog.MinimizeBox);
+            }
+
+            mocks.VerifyAll();
+        }
+    }
+}