actions: force PHPUnit 9

PHPUnit 10 is incompatible with our tests. Not worth adapting anymore.

diff --git a/.github/workflows/ci-tests.yml b/.github/workflows/ci-tests.yml
index 1f6f1bb7924b2df05ef7607d13237091c54b4e7f..3fe0b9d81d326925b64024f3567e0e0676e5c241 100644 (file)
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -72,7 +72,7 @@ jobs:
               uses: shivammathur/setup-php@v2
               with:
                   php-version: ${{ matrix.php }}
-                  tools: phpunit, phpcs, composer
+                  tools: phpunit:9, phpcs, composer
                   ini-values: opcache.jit=disable
 
             - uses: actions/setup-python@v4