I have fixtures with this code:

$post = new Post(
    $date,
    $faker->slug,
    $faker->sentence(4)
);

if ($faker->boolean(60)) {
    $post->publish($date);
}

And in 3.8.2 only I get errors for every usage of method boolean():

ERROR: UndefinedMagicMethod - BlogFixture.php:42:25 - Magic method Faker\Generator::boolean does not exist
if ($faker->boolean(60)) {

but other magic methods like sentence() above work correctly.

All methods are specified in Faker's PHPDoc.