diff --git a/CHANGELOG b/CHANGELOG
index f99debd..eaaeaf5 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,7 @@
 *SVN*
 
+* Add tests for Object.extend and Object.clone.  [Tobie Langel]
+
 * Add a test for Form.Observer.  [Christoph Sturm]
 
 * Make sure setting opacity works on elements that have "no layout" in IE.  [Thomas Fuchs]
diff --git a/test/unit/base.html b/test/unit/base.html
index 23a524c..c48777b 100644
--- a/test/unit/base.html
+++ b/test/unit/base.html
@@ -162,6 +162,27 @@
       assertEqual(baz, baz.quux());
     }},
 
+    testObjectExtend: function() { with(this) {
+      var object = {foo: 'foo', bar: [1, 2, 3]};
+      assertIdentical(object, Object.extend(object));
+      assertHashEqual({foo: 'foo', bar: [1, 2, 3]}, object);
+      assertIdentical(object, Object.extend(object, {bla: 123}));
+      assertHashEqual({foo: 'foo', bar: [1, 2, 3], bla: 123}, object);
+      assertHashEqual({foo: 'foo', bar: [1, 2, 3], bla: null},
+        Object.extend(object, {bla: null}));
+    }},
+
+    testObjectClone: function() { with(this) {
+      var object = {foo: 'foo', bar: [1, 2, 3]};
+      assertNotIdentical(object, Object.clone(object));
+      assertHashEqual(object, Object.clone(object));
+      assertHashEqual({}, Object.clone());
+      var clone = Object.clone(object);
+      delete clone.bar;
+      assertHashEqual({foo: 'foo'}, clone, 
+        "Optimizing Object.clone perf using prototyping doesn't allow properties to be deleted.");
+    }},
+
     testObjectInspect: function() { with(this) {
       assertEqual('undefined', Object.inspect());
       assertEqual('undefined', Object.inspect(undefined));