Schema for PHPUnit 9.5 is not available

[alexius]

Try to run tests on newly installed Lumen Framework and get this error "Schema for PHPUnit 9.5 is not available".

My composer.json for the project:

{
    "name": "api/service",
    "description": "API Service.",
    "keywords": ["framework", "laravel", "lumen"],
    "license": "MIT",
    "type": "project",
    "require": {
        "php": "^7.4|^8.0",
        "flipbox/lumen-generator": "^8.2",
        "intervention/image": "^2.6",
        "laravel/lumen-framework": "^8.0"
    },
    "require-dev": {
        "fakerphp/faker": "^1.9.1",
        "league/flysystem": "^1.0",
        "mockery/mockery": "^1.3.1",
        "phpunit/phpunit": "^9.3"
    },
    "autoload": {
        "psr-4": {
            "App\\": "app/",
            "Database\\Factories\\": "database/factories/",
            "Database\\Seeders\\": "database/seeders/"
        }
    },
    "autoload-dev": {
        "classmap": [
          "tests/"
        ]
    },
    "config": {
        "preferred-install": "dist",
        "sort-packages": true,
        "optimize-autoloader": true
    },
    "minimum-stability": "dev",
    "prefer-stable": true,
    "scripts": {
        "post-root-package-install": [
            "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
        ]
    }
}

Installed version in project you can see on picture:

There is no 9.5.xsd file in the folder of PHPUnit:

Maybe this is a reason.

How can I resolve this problem?

Thank you.

[sebastianbergmann]

The files in the schema folder are the schemas for older versions. The phpunit.xsd file in the root directory is the schema for the current version.

[alexius]

Yes, I know, thanks.

I didn't make any changes in phpunit folder. It's fresh installed and I got this error. In phpunit.xml I have:

<?xml version="1.0" encoding="UTF-8"?>
<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
         bootstrap="vendor/autoload.php"
         colors="true"
>
    <testsuites>
        <testsuite name="Application Test Suite">
            <directory suffix="Test.php">./tests</directory>
        </testsuite>
    </testsuites>
    <php>
        <env name="APP_ENV" value="testing"/>
        <env name="CACHE_DRIVER" value="array"/>
        <env name="QUEUE_CONNECTION" value="sync"/>
        <env name="DB_CONNECTION" value="sqlite"/>
    </php>
</phpunit>

I use the command for running the tests: vendor/bin/phpunit
What to do to resolve an issue?

Thank you.

[alexius]

As I understood the problem is in determination of the path of phpunit.xsd file in SchemaFinder class.

Here you have in path() function:
return __DIR__ . '/../../phpunit/';

But you need to go two folders upper:

So if i change to:
return __DIR__ . '/../../../../phpunit/';
the error is gone.

I don't know if it's a right decision.