diff --git a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectSpatialTests.cs b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectSpatialTests.cs
index fffa3bd152..9fea3c63a7 100644
--- a/OpenSim/Region/Framework/Scenes/Tests/SceneObjectSpatialTests.cs
+++ b/OpenSim/Region/Framework/Scenes/Tests/SceneObjectSpatialTests.cs
@@ -111,8 +111,44 @@ namespace OpenSim.Region.Framework.Scenes.Tests
             Assert.That(childPart.GetWorldPosition(), Is.EqualTo(childPosition));
             Assert.That(childPart.RelativePosition, Is.EqualTo(childOffsetPosition));
             Assert.That(childPart.OffsetPosition, Is.EqualTo(childOffsetPosition));
+        }
 
-            // TODO: Write test for child part position after rotation.
+        [Test]
+        public void TestGetChildPartPositionAfterObjectRotation()
+        {
+            TestHelpers.InMethod();
+
+            Vector3 rootPartPosition = new Vector3(10, 20, 30);
+            Vector3 childOffsetPosition = new Vector3(2, 3, 4);
+
+            SceneObjectGroup so
+                = SceneHelpers.CreateSceneObject(2, m_ownerId, "obj1", 0x10);
+            so.AbsolutePosition = rootPartPosition;
+            so.Parts[1].OffsetPosition = childOffsetPosition;
+
+            m_scene.AddNewSceneObject(so, false);
+
+            so.UpdateGroupRotationR(Quaternion.CreateFromEulers(0, 0, -90 * Utils.DEG_TO_RAD));
+
+            // Calculate child absolute position.
+            Vector3 rotatedChildOffsetPosition
+                = new Vector3(childOffsetPosition.Y, -childOffsetPosition.X, childOffsetPosition.Z);
+
+            Vector3 childPosition = new Vector3(rootPartPosition + rotatedChildOffsetPosition);
+
+            SceneObjectPart childPart = so.Parts[1];
+
+            // FIXME: Should be childPosition after rotation?
+            Assert.That(childPart.AbsolutePosition, Is.EqualTo(rootPartPosition + childOffsetPosition));
+
+            Assert.That(childPart.GroupPosition, Is.EqualTo(rootPartPosition));
+            Assert.That(childPart.GetWorldPosition(), Is.EqualTo(childPosition));
+
+            // Relative to root part as (0, 0, 0)
+            Assert.That(childPart.RelativePosition, Is.EqualTo(childOffsetPosition));
+
+            // Relative to root part as (0, 0, 0)
+            Assert.That(childPart.OffsetPosition, Is.EqualTo(childOffsetPosition));
         }
     }
 }
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