@@ -90,10 +90,16 @@
 
 - (void)testCopy
 {
 	OTAssertEqualObjects([[_dictionary copy] autorelease], _dictionary);
 }
+
+- (void)testMutableCopy
+{
+	OTAssertEqualObjects(
+	    [[_dictionary mutableCopy] autorelease], _dictionary);
+}
 
 - (void)testValueForKey
 {
 	OTAssertEqualObjects([_dictionary valueForKey: keys[0]], objects[0]);
 	OTAssertEqualObjects([_dictionary valueForKey: keys[1]], objects[1]);