diff --git a/Perspex.Base/Collections/PerspexList.cs b/Perspex.Base/Collections/PerspexList.cs
index b0775bd4a9..48e34e5ffc 100644
--- a/Perspex.Base/Collections/PerspexList.cs
+++ b/Perspex.Base/Collections/PerspexList.cs
@@ -115,6 +115,8 @@ namespace Perspex.Collections
 
         public void AddRange(IEnumerable<T> items)
         {
+            Contract.Requires<ArgumentNullException>(items != null);
+
             int index = this.inner.Count;
             this.inner.AddRange(items);
             this.NotifyAdd((items as IList) ?? items.ToList(), index);
@@ -155,6 +157,8 @@ namespace Perspex.Collections
 
         public void InsertRange(int index, IEnumerable<T> items)
         {
+            Contract.Requires<ArgumentNullException>(items != null);
+
             this.inner.InsertRange(index, items);
             this.NotifyAdd((items as IList) ?? items.ToList(), index);
         }
@@ -175,6 +179,8 @@ namespace Perspex.Collections
 
         public void RemoveAll(IEnumerable<T> items)
         {
+            Contract.Requires<ArgumentNullException>(items != null);
+
             List<T> removed = new List<T>();
 
             foreach (var i in items)
diff --git a/Tests/Perspex.Base.UnitTests/Collections/PerspexListTests.cs b/Tests/Perspex.Base.UnitTests/Collections/PerspexListTests.cs
new file mode 100644
index 0000000000..4518fda7db
--- /dev/null
+++ b/Tests/Perspex.Base.UnitTests/Collections/PerspexListTests.cs
@@ -0,0 +1,185 @@
+// -----------------------------------------------------------------------
+// <copyright file="PerspexListTests.cs" company="Steven Kirk">
+// Copyright 2015 MIT Licence. See licence.md for more information.
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace Perspex.Base.UnitTests
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Collections.Specialized;
+    using System.Linq;
+    using Perspex.Collections;
+    using Xunit;
+
+    public class PerspexListTests
+    {
+        [Fact]
+        public void Items_Passed_To_Constructor_Should_Appear_In_List()
+        {
+            var items = new[] { 1, 2, 3 };
+            var target = new PerspexList<int>(items);
+
+            Assert.Equal(items, target);
+        }
+
+        [Fact]
+        public void AddRange_With_Null_Should_Throw_Exception()
+        {
+            var target = new PerspexList<int>();
+
+            Assert.Throws<ArgumentNullException>(() => target.AddRange(null));
+        }
+
+        [Fact]
+        public void RemoveAll_With_Null_Should_Throw_Exception()
+        {
+            var target = new PerspexList<int>();
+
+            Assert.Throws<ArgumentNullException>(() => target.RemoveAll(null));
+        }
+
+        [Fact]
+        public void InsertRange_With_Null_Should_Throw_Exception()
+        {
+            var target = new PerspexList<int>();
+
+            Assert.Throws<ArgumentNullException>(() => target.InsertRange(1, null));
+        }
+
+        [Fact]
+        public void InsertRange_Past_End_Should_Throw_Exception()
+        {
+            var target = new PerspexList<int>();
+
+            Assert.Throws<ArgumentOutOfRangeException>(() => target.InsertRange(1, new List<int>() { 1 }));
+        }
+
+        [Fact]
+        public void Adding_Item_Should_Raise_CollectionChanged()
+        {
+            var target = new PerspexList<int>(new[] { 1, 2 });
+            var raised = false;
+
+            target.CollectionChanged += (s, e) =>
+            {
+                Assert.Equal(target, s);
+                Assert.Equal(NotifyCollectionChangedAction.Add, e.Action);
+                Assert.Equal(new[] { 3 }, e.NewItems.Cast<int>());
+                Assert.Equal(2, e.NewStartingIndex);
+
+                raised = true;
+            };
+
+            target.Add(3);
+
+            Assert.True(raised);
+        }
+
+        [Fact]
+        public void Adding_Items_Should_Raise_CollectionChanged()
+        {
+            var target = new PerspexList<int>(new[] { 1, 2 });
+            var raised = false;
+
+            target.CollectionChanged += (s, e) =>
+            {
+                Assert.Equal(target, s);
+                Assert.Equal(NotifyCollectionChangedAction.Add, e.Action);
+                Assert.Equal(new[] { 3, 4 }, e.NewItems.Cast<int>());
+                Assert.Equal(2, e.NewStartingIndex);
+
+                raised = true;
+            };
+
+            target.AddRange(new[] { 3, 4 });
+
+            Assert.True(raised);
+        }
+
+        [Fact]
+        public void Inserting_Item_Should_Raise_CollectionChanged()
+        {
+            var target = new PerspexList<int>(new[] { 1, 2 });
+            var raised = false;
+
+            target.CollectionChanged += (s, e) =>
+            {
+                Assert.Equal(target, s);
+                Assert.Equal(NotifyCollectionChangedAction.Add, e.Action);
+                Assert.Equal(new[] { 3 }, e.NewItems.Cast<int>());
+                Assert.Equal(1, e.NewStartingIndex);
+
+                raised = true;
+            };
+
+            target.Insert(1, 3);
+
+            Assert.True(raised);
+        }
+
+        [Fact]
+        public void Inserting_Items_Should_Raise_CollectionChanged()
+        {
+            var target = new PerspexList<int>(new[] { 1, 2 });
+            var raised = false;
+
+            target.CollectionChanged += (s, e) =>
+            {
+                Assert.Equal(target, s);
+                Assert.Equal(NotifyCollectionChangedAction.Add, e.Action);
+                Assert.Equal(new[] { 3, 4 }, e.NewItems.Cast<int>());
+                Assert.Equal(1, e.NewStartingIndex);
+
+                raised = true;
+            };
+
+            target.InsertRange(1, new[] { 3, 4 });
+
+            Assert.True(raised);
+        }
+
+        [Fact]
+        public void Removing_Item_Should_Raise_CollectionChanged()
+        {
+            var target = new PerspexList<int>(new[] { 1, 2, 3 });
+            var raised = false;
+
+            target.CollectionChanged += (s, e) =>
+            {
+                Assert.Equal(target, s);
+                Assert.Equal(NotifyCollectionChangedAction.Remove, e.Action);
+                Assert.Equal(new[] { 3 }, e.OldItems.Cast<int>());
+                Assert.Equal(2, e.OldStartingIndex);
+
+                raised = true;
+            };
+
+            target.Remove(3);
+
+            Assert.True(raised);
+        }
+
+        [Fact]
+        public void Clearing_Items_Should_Raise_CollectionChanged_Remove()
+        {
+            var target = new PerspexList<int>(new[] { 1, 2, 3 });
+            var raised = false;
+
+            target.CollectionChanged += (s, e) =>
+            {
+                Assert.Equal(target, s);
+                Assert.Equal(NotifyCollectionChangedAction.Remove, e.Action);
+                Assert.Equal(new[] { 1, 2, 3 }, e.OldItems.Cast<int>());
+                Assert.Equal(0, e.OldStartingIndex);
+
+                raised = true;
+            };
+
+            target.Clear();
+
+            Assert.True(raised);
+        }
+    }
+}
diff --git a/Tests/Perspex.Base.UnitTests/Perspex.Base.UnitTests.csproj b/Tests/Perspex.Base.UnitTests/Perspex.Base.UnitTests.csproj
index 60eff76db2..abbb9e8365 100644
--- a/Tests/Perspex.Base.UnitTests/Perspex.Base.UnitTests.csproj
+++ b/Tests/Perspex.Base.UnitTests/Perspex.Base.UnitTests.csproj
@@ -70,6 +70,7 @@
     <Otherwise />
   </Choose>
   <ItemGroup>
+    <Compile Include="Collections\PerspexListTests.cs" />
     <Compile Include="PerspexPropertyTests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="PerspexObjectTests.cs" />