[
    MyTestClass1(x=1),
    MyTestClass1(x=1, y=2, z=3),
    MyTestClass2(x=10),
    MyTestClass2(x=10, y=20, z=30),
    MyTestClass3(x=1),
    MyTestClass3(x=1, y=2, z=3),
    MyTestClass3(x=1, y=2, z=3),
]