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 cdc7ea1e3ec60ed41c04ce4c355e7869c3f03282..3c5f1c91a46707e626ce24c66fec1e2c912e0b97 100644 (file)
--- a/.github/workflows/ci-tests.yml
+++ b/.github/workflows/ci-tests.yml
@@ -69,7 +69,7 @@ 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