This also seems to apply to unittest.mock in Python3.4.

I described my similar issue on SO: http://stackoverflow.com/questions/42212433/what-is-wrong-with-this-simple-py-test-use-case

It seems like it may be the same issue described here.

For reference, this is my repro case:

from unittest.mock import patch, call

    class Foo:
        def __init__(self):
            pass
        def my_method(self, value):
            pass
    
    def test_foo():
        with patch('test.Foo', autospec=True) as MockFoo:
            m = MockFoo()
            m.my_method(123)
            MockFoo.assert_has_calls([call(), call().my_method(123)])

It fails with:

    ...
    E               AssertionError: Calls not found.
    E               Expected: [call(), call().my_method(123)]
    E               Actual:   [call(), call().my_method(123)]

Which seems nonsensical to me.

Removing the `value` parameter and the `123` arguments in the test makes it pass(!)