diff --git a/.github/workflows/phpunit-tests-run.yml b/.github/workflows/phpunit-tests-run.yml
index 843a950481..af03911f4a 100644
--- a/.github/workflows/phpunit-tests-run.yml
+++ b/.github/workflows/phpunit-tests-run.yml
@@ -165,6 +165,7 @@ jobs:
 
       # __fakegroup__ is excluded to force PHPUnit to ignore the <exclude> settings in phpunit.xml.dist.
       - name: Run (Xdebug) tests
+        if: ${{ inputs.php != '8.3' }}
         run: LOCAL_PHP_XDEBUG=true node ./tools/local-env/scripts/docker.js run php ./vendor/bin/phpunit -v --group xdebug --exclude-group __fakegroup__
 
       - name: Ensure version-controlled files are not modified or deleted
diff --git a/.github/workflows/phpunit-tests.yml b/.github/workflows/phpunit-tests.yml
index 9c399d51ed..7edf916080 100644
--- a/.github/workflows/phpunit-tests.yml
+++ b/.github/workflows/phpunit-tests.yml
@@ -45,7 +45,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        php: [ '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2' ]
+        php: [ '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3' ]
         db-type: [ 'mysql' ]
         db-version: [ '5.7', '8.0' ]
         multisite: [ false, true ]
@@ -97,7 +97,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        php: [ '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2' ]
+        php: [ '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3' ]
         db-type: [ 'mariadb' ]
         db-version: [ '10.4', '10.6', '10.11', '11.0' ]
         multisite: [ false, true ]