The test for SQLAlchemy is broken

[laughingman7743]

============================= test session starts ==============================
platform linux -- Python 3.6.3, pytest-3.8.2, py-1.6.0, pluggy-0.7.1
rootdir: /home/travis/build/laughingman7743/PyAthena, inifile: setup.cfg
plugins: flake8-1.0.2, cov-2.6.0
collected 121 items
setup.py .                                                               [  0%]
pyathena/__init__.py .                                                   [  1%]
pyathena/async_cursor.py .                                               [  2%]
pyathena/common.py .                                                     [  3%]
pyathena/connection.py .                                                 [  4%]
pyathena/converter.py .                                                  [  4%]
pyathena/cursor.py .                                                     [  5%]
pyathena/error.py .                                                      [  6%]
pyathena/formatter.py .                                                  [  7%]
pyathena/model.py .                                                      [  8%]
pyathena/pandas_cursor.py .                                              [  9%]
pyathena/result_set.py .                                                 [  9%]
pyathena/sqlalchemy_athena.py .                                          [ 10%]
pyathena/util.py .                                                       [ 11%]
tests/__init__.py .                                                      [ 12%]
tests/conftest.py .                                                      [ 13%]
tests/test_async_cursor.py ...............                               [ 25%]
tests/test_cursor.py ................................                    [ 52%]
tests/test_formatter.py ......................                           [ 70%]
tests/test_pandas_cursor.py .................                            [ 84%]
tests/test_result_set.py ...                                             [ 86%]
tests/test_sqlalchemy_athena.py .....F.........                          [ 99%]
tests/util.py .                                                          [100%]
=================================== FAILURES ===================================
_____________________ TestSQLAlchemyAthena.test_has_table ______________________
self = <tests.test_sqlalchemy_athena.TestSQLAlchemyAthena testMethod=test_has_table>
engine = Engine(awsathena+rest://athena.[secure].amazonaws.com:443/test_pyathena_6msjtv4t1y?s3_staging_dir=[secure])
connection = <sqlalchemy.engine.base.Connection object at 0x7f2dfb800390>
    @with_engine
    def test_has_table(self, engine, connection):
        self.assertTrue(Table('one_row', MetaData(bind=engine)).exists())
>       self.assertFalse(Table('this_table_does_not_exist', MetaData(bind=engine)).exists())
E       AssertionError: True is not false
tests/test_sqlalchemy_athena.py:115: AssertionError