diff --git a/.github/workflows/php.yml b/.github/workflows/php.yml
index f18eab3..f85735f 100644
--- a/.github/workflows/php.yml
+++ b/.github/workflows/php.yml
@@ -8,6 +8,7 @@ on:
   pull_request:
     branches:
       - main
+      - release/*
 
 jobs:
   lint:
@@ -40,3 +41,17 @@ jobs:
       - name: PHP CodeSniffer
         if: success() || matrix.allow_failure
         run: phpcs -wps --colors
+
+      - name: Setup Libraries
+        run: |
+          mkdir -p _libraries
+          git clone --depth 1 -b snapshot/nightly https://github.com/Icinga/icinga-php-library.git _libraries/ipl
+          git clone --depth 1 -b snapshot/nightly https://github.com/Icinga/icinga-php-thirdparty.git _libraries/vendor
+          git clone --depth 1 https://github.com/Icinga/icingaweb2.git _icingaweb2
+          git clone --depth 1 https://github.com/Icinga/icingadb-web.git _icingaweb2/modules/icingadb
+          ln -s `pwd` _icingaweb2/modules/toplevelview
+
+      - name: PHPUnit
+        env:
+          ICINGAWEB_LIBDIR:  _libraries/
+        run: phpunit --verbose