diff --git a/.github/workflows/phpunit-object-store-primary.yml b/.github/workflows/phpunit-object-store-primary.yml
new file mode 100644
index 0000000000000..a9ef4e31e4e26
--- /dev/null
+++ b/.github/workflows/phpunit-object-store-primary.yml
@@ -0,0 +1,119 @@
+# SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
+name: PHPUnit primary object store
+on:
+  pull_request:
+  schedule:
+    - cron: "15 2 * * *"
+
+concurrency:
+  group: phpunit-object-store-primary-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  changes:
+    runs-on: ubuntu-latest-low
+
+    outputs:
+      src: ${{ steps.changes.outputs.src}}
+
+    steps:
+      - uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
+        id: changes
+        continue-on-error: true
+        with:
+          filters: |
+            src:
+              - '.github/workflows/**'
+              - '3rdparty/**'
+              - '**/appinfo/**'
+              - '**/lib/**'
+              - '**/templates/**'
+              - '**/tests/**'
+              - 'vendor/**'
+              - 'vendor-bin/**'
+              - '.php-cs-fixer.dist.php'
+              - 'composer.json'
+              - 'composer.lock'
+              - '**.php'
+
+  object-store-primary-tests-minio:
+    runs-on: ubuntu-latest
+    needs: changes
+
+    if: ${{ github.repository_owner != 'nextcloud-gmbh' && needs.changes.outputs.src != 'false' }}
+
+    strategy:
+      # do not stop on another job's failure
+      fail-fast: false
+      matrix:
+        php-versions: ['8.1']
+        key: ['s3', 's3-multibucket']
+
+    name: php${{ matrix.php-versions }}-${{ matrix.key }}-minio
+
+    services:
+      cache:
+        image: ghcr.io/nextcloud/continuous-integration-redis:latest
+        ports:
+          - 6379:6379/tcp
+        options: --health-cmd="redis-cli ping" --health-interval=10s --health-timeout=5s --health-retries=3
+
+      minio:
+        image: bitnami/minio
+        env:
+          MINIO_ROOT_USER: nextcloud
+          MINIO_ROOT_PASSWORD: bWluaW8tc2VjcmV0LWtleS1uZXh0Y2xvdWQ=
+          MINIO_DEFAULT_BUCKETS: nextcloud
+        ports:
+          - "9000:9000"
+
+    steps:
+      - name: Checkout server
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+        with:
+          submodules: true
+
+      - name: Set up php ${{ matrix.php-versions }}
+        uses: shivammathur/setup-php@c5fc0d8281aba02c7fda07d3a70cc5371548067d #v2.25.2
+        with:
+          php-version: ${{ matrix.php-versions }}
+          extensions: mbstring, fileinfo, intl, sqlite, pdo_sqlite, zip, gd
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Nextcloud
+        env:
+          OBJECT_STORE: ${{ matrix.key }}
+          OBJECT_STORE_KEY: nextcloud
+          OBJECT_STORE_SECRET: bWluaW8tc2VjcmV0LWtleS1uZXh0Y2xvdWQ=
+        run: |
+          composer install
+          cp tests/redis.config.php config/
+          cp tests/preseed-config.php config/config.php
+          ./occ maintenance:install --verbose --database=sqlite --database-name=nextcloud --database-host=127.0.0.1 --database-user=root --database-pass=rootpassword --admin-user admin --admin-pass password
+          php -f tests/enable_all.php | grep -i -C9999 error && echo "Error during app setup" && exit 1 || exit 0
+
+      - name: Wait for S3
+        run: |
+          sleep 10
+          curl -f -m 1 --retry-connrefused --retry 10 --retry-delay 10 http://localhost:9000/minio/health/ready
+
+      - name: PHPUnit
+        run: composer run test:db
+      - name: S3 logs
+        if: always()
+        run: |
+          docker ps -a
+          docker logs $(docker ps -aq | grep minio)
+
+
+  object-store-primary-summary:
+    runs-on: ubuntu-latest-low
+    needs: [changes,object-store-primary-tests-minio]
+
+    if: always()
+
+    steps:
+      - name: Summary status
+        run: if ${{ needs.changes.outputs.src != 'false' && needs.object-store-primary-tests-minio.result != 'success' }}; then exit 1; fi
diff --git a/tests/preseed-config.php b/tests/preseed-config.php
index 3095690e48369..1524861bf6c24 100644
--- a/tests/preseed-config.php
+++ b/tests/preseed-config.php
@@ -38,6 +38,21 @@
 			'use_path_style' => true
 		]
 	];
+} elseif (getenv('OBJECT_STORE') === 's3-multibucket') {
+	$CONFIG['objectstore_multibucket'] = [
+		'class' => 'OC\\Files\\ObjectStore\\S3',
+		'arguments' => [
+			'bucket' => 'nextcloud',
+			'autocreate' => true,
+			'key' => getenv('OBJECT_STORE_KEY') ?: 'nextcloud',
+			'secret' => getenv('OBJECT_STORE_SECRET') ?: 'nextcloud',
+			'hostname' => getenv('OBJECT_STORE_HOST') ?: 'localhost',
+			'port' => 9000,
+			'use_ssl' => false,
+			// required for some non amazon s3 implementations
+			'use_path_style' => true
+		]
+	];
 } elseif (getenv('OBJECT_STORE') === 'azure') {
 	$CONFIG['objectstore'] = [
 		'class' => 'OC\\Files\\ObjectStore\\Azure',