diff --git a/.gitmodules b/.gitmodules
index 4943841..e3c76c4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -19,3 +19,6 @@
 [submodule "l10n/importer"]
 	path = l10n/importer
 	url = gitea:museum-digital/translations-importer.git
+[submodule "classes/MD_QA"]
+	path = classes/MD_QA
+	url = gitea:museum-digital/MD_QA.git
diff --git a/classes/MD_QA b/classes/MD_QA
new file mode 160000
index 0000000..10d5759
--- /dev/null
+++ b/classes/MD_QA
@@ -0,0 +1 @@
+Subproject commit 10d575901625a2393e6c349df0a9a3e7b4dcbfac
diff --git a/composer.json b/composer.json
index 03f289e..aebb81a 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,10 @@
 {
     "require": {
         "phpmailer/phpmailer": "^6.1",
-        "phpunit/phpunit": "^9.4"
+        "phpunit/phpunit": "^9.4",
+        "phpstan/phpstan": "^0.12.57",
+        "phpstan/phpstan-strict-rules": "^0.12.5",
+        "ergebnis/phpstan-rules": "^0.15.3",
+        "phpstan/phpstan-deprecation-rules": "^0.12.5"
     }
 }
diff --git a/scripts/checkCodeQuality.sh b/scripts/checkCodeQuality.sh
index f679637..f65bc1a 100644
--- a/scripts/checkCodeQuality.sh
+++ b/scripts/checkCodeQuality.sh
@@ -28,7 +28,7 @@ echo "phpcs-errors:$PHPCS_RESULT";
 
 # Run PHPUnit
 
-PHPUNIT_TEST_BASE_DIR="$SCRIPT_DIR/../csvxml.imports.museum-digital.org"
+PHPUNIT_TEST_BASE_DIR="$SCRIPT_DIR/../"
 
 $(php $PHPUNIT_TEST_BASE_DIR/vendor/bin/phpunit --stderr -c $PHPUNIT_TEST_BASE_DIR/tests/config.xml --testdox $PHPUNIT_TEST_BASE_DIR/tests)
 PHPUNIT_EC=$?
@@ -39,8 +39,8 @@ else
     echo "phpunit-status:successful";
 fi
 
-PHPSTAN_TEST_BASE_DIR="/var/www/vhosts/museum-digital.de/sandkasten.museum-digital.de"
-PHPSTAN_CONF_BASE_DIR="/var/www/vhosts/museum-digital.de/csvxml.imports.museum-digital.org"
+PHPSTAN_TEST_BASE_DIR="$SCRIPT_DIR/../"
+PHPSTAN_CONF_BASE_DIR="$SCRIPT_DIR/../"
 
 PHPSTAN_ERRORS=$(php $PHPSTAN_TEST_BASE_DIR/vendor/bin/phpstan analyze --error-format raw -c $PHPSTAN_CONF_BASE_DIR/phpstan.neon -l 8 | wc -l)
 echo "phpstan-errors:$PHPSTAN_ERRORS"