Laravel7: Running integrations tests end in failure, NOT Found

Question

I am upgrading my Laravel app form L6 to L7 and when I try to run integration tests, it ends in failure. So here is my setup code:

protected function runCommand($command, array $arguments = [], OutputInterface $output = null)
    {
        $process = new Process([$command]);
        $process->setTimeout(120);
        $process->run();

        if ($process->isSuccessful()) {
            \Log::debug('successfully');
        } else {
            \Log::debug('NOT', [$process->getIncrementalErrorOutput()]);
        }
    }

Now as you can see, this method is running some commands and when the commnds run, these are the errors I get:

[2023-12-05 07:17:31] testing.DEBUG: NOT ["sh: 1: exec: mysql -hdb -uroot -psecret -e \"drop schema if exists phirater_tst; create schema phirater_tst default charset utf8 collate utf8_unicode_ci\": not found\n"] 
[2023-12-05 07:17:31] testing.DEBUG: NOT ["sh: 1: exec: ./artisan migrate --database=mysql_testing: not found\n"] 
[2023-12-05 07:17:31] testing.DEBUG: NOT ["sh: 1: exec: mysqldump -hdb -uroot -ppass --add-drop-table phirater_tst > /tmp/e1440949b437f065addb21be548316b4: not found\n"] 
[2023-12-05 07:17:31] testing.DEBUG: NOT ["sh: 1: exec: mysql -hdb -uroot -ppass phirater_tst < /tmp/e1440949b437f065addb21be548316b4: not found\n"]

I am on PHP 7.4 with L7 running in a docker container. What am I doing wrong here?

EDIT:

If I run these commands directly inside the container, these work fine.