Laravel 5.5 dusk could not work

I make a new laravel project.

composer create-project laravel/laravel testing_laravel
composer require laravel/dusk --dev 
php artisan serve
php artisan dusk

and then...

PHPUnit 6.3.1 by Sebastian Bergmann and contributors.

F                                                                   1 /         1 (100%)

Time: 1.12 seconds, Memory: 10.00MB

There was 1 failure:

1) Tests\Browser\ExampleTest::testBasicExample
Did not see expected text [Laravel] within element [body].
Failed asserting that false is true.

/Users/nobuhiroharada/work/laracast/testing_laravel/vendor/laravel/dusk/src/Concerns/MakesAssertions.php:274
/Users/nobuhiroharada/work/laracast/testing_laravel/vendor/laravel/dusk/src/Concerns/MakesAssertions.php:245
/Users/nobuhiroharada/work/laracast/testing_laravel/tests/Browser/ExampleTest.php:20
/Users/nobuhiroharada/work/laracast/testing_laravel/vendor/laravel/dusk/src/TestCase.php:92
/Users/nobuhiroharada/work/laracast/testing_laravel/tests/Browser/ExampleTest.php:21

FAILURES!
Tests: 1, Assertions: 1, Failures: 1.

Chrome browser is not lauching.

I am using.. macOS Sierra 10.12.1 localhost

"laravel/framework": "5.5.*", "laravel/dusk": "^2.0"

Google Chrome version: 61.0.3163.100 ChromeDriver 2.31.488774

Thank you very much for your help.

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