Fatal error: Trait "Consolidation\SiteAlias\FixtureFactory" not found in /var/www/html/vendor/consolidation/site-alias/tests/SiteAliasFileDiscoveryTest.php on line 6

[apotek]

When running phpunit on a project that requires robo, we get an inability to find one of the traits.

phpunit is invoked as follows

XDEBUG_MODE=coverage phpunit --debug --verbose .

Error is:

Fatal error: Trait "Consolidation\SiteAlias\FixtureFactory" not found in /var/www/html/vendor/consolidation/site-alias/tests/SiteAliasFileDiscoveryTest.php on line 6

Versions:

$ robo --version
Robo 5.1.1
$ phpunit --version
PHPUnit 9.6.31 by Sebastian Bergmann and contributors.

Our project's composer autoload and optimizer section:

    "autoload": {
        "psr-4": {
            "Usher\\": "src"
        }
    },
...
...
...
    "config": {
...
...

        "optimize-autoloader": true

Our robo require:

        "consolidation/robo": "^1.4 || ^2 || ^3 || ^4 || ^5",