public function testFormButton(): void
{
    $client = static::createClient();

    $client->request('GET', '/');

    $client->submitForm('My button', ['name' => 'John']);
    $client->submitForm('btn_id', ['name' => 'John']);
    $client->submitForm('btn_name', ['name' => 'John']);
    $client->submitForm('btn_value', ['name' => 'John']); // this fails
}

// Crawler.php

public function selectButton(string $value): static
{
    return $this->filterRelativeXPath(
        sprintf('descendant-or-self::input[((contains(%1$s, "submit") or contains(%1$s, "button")) and contains(concat(\' \', normalize-space(string(@value)), \' \'), %2$s)) or (contains(%1$s, "image") and contains(concat(\' \', normalize-space(string(@alt)), \' \'), %2$s)) or @id=%3$s or @name=%3$s] | descendant-or-self::button[contains(concat(\' \', normalize-space(string(.)), \' \'), %2$s) or @id=%3$s or @name=%3$s]', 'translate(@type, "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "abcdefghijklmnopqrstuvwxyz")', static::xpathLiteral(' '.$value.' '), static::xpathLiteral($value))
    );
}