PHPUnit on Production

Hi,

CodeIgniter 4.5.1

I'm getting the following message on my production server after deploying with GIT

Code:

Warning: require(/home/project/vendor/composer/../phpunit/phpunit/src/Framework/Assert/Functions.php): Failed to open stream: No such file or directory in /home/project/vendor/composer/autoload_real.php on line 55

Note: I've edited the actual project folder names above.

I've removed "phpunit/phpunit": "^9.5"  from composer.json "require-dev" and run composer update, but it seems that something is still adding it to the composer.lock file

I also have this entry in .gitignore

Code:

# Don't save phpunit under version control.
phpunit

Any help/pointers would be appreciated