diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 07721a37c9e3..ad1109a26bcb 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.operating-system }}
     strategy:
       matrix:
-        operating-system: ['ubuntu-18.04', 'ubuntu-20.04', 'ubuntu-22.04']
+        operating-system: ['ubuntu-20.04', 'ubuntu-22.04']
         php-versions: ['8.1']
         phpunit-versions: ['latest']