Installation failed - Requirements could not be resolved

[eleftrik]

I know this isn't a specific problem of this package, but I kindly ask for your help.

I've a Laravel 7 project with this composer.json:

"require-dev": { ... "phpunit/phpunit": "^8.5" }, ... "minimum-stability": "dev", "prefer-stable": true,

When I run composer require phpunit/php-timer, I got this error:

Using version ^3.0 for phpunit/php-timer
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- phpunit/phpunit 8.5.2 requires phpunit/php-timer ^2.1.2 -> satisfiable by phpunit/php-timer[2.1.2] but these conflict with your requirements or minimum-stability.
- phpunit/phpunit 8.5.2 requires phpunit/php-timer ^2.1.2 -> satisfiable by phpunit/php-timer[2.1.2] but these conflict with your requirements or minimum-stability.
- phpunit/phpunit 8.5.2 requires phpunit/php-timer ^2.1.2 -> satisfiable by phpunit/php-timer[2.1.2] but these conflict with your requirements or minimum-stability.
- Installation request for phpunit/phpunit (locked at 8.5.2, required as ^8.5) -> satisfiable by phpunit/phpunit[8.5.2].

What can I do to install this package?

Thank you very much for any help.

[sebastianbergmann]

This is not a discussion or support forum, sorry.

[eleftrik]

Sorry @sebastianbergmann, you're absolutely right.

By the way, I had only to better read the error.
Solved running composer require phpunit/php-timer "^2.1.2"