diff --git a/lib/AppInfo/Application.php b/lib/AppInfo/Application.php
index 2506967..8441d04 100644
--- a/lib/AppInfo/Application.php
+++ b/lib/AppInfo/Application.php
@@ -2,12 +2,10 @@
 
 namespace OCA\OJSXC\AppInfo;
 
-use OC\Security\CSP\ContentSecurityPolicyManager;
 use OCA\OJSXC\Controller\ManagedServerController;
 use OCA\OJSXC\Middleware\ExternalApiMiddleware;
 use OCA\OJSXC\Config;
 use OCA\OJSXC\Listener\AddFeaturePolicyListener;
-use OCP\IContainer;
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
diff --git a/psalm.xml b/psalm.xml
index e7b226e..be69961 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -6,6 +6,7 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="https://getpsalm.org/schema/config"
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    errorBaseline="tests/psalm-baseline.xml"
 >
     <projectFiles>
         <directory name="lib" />
diff --git a/tests/psalm-baseline.xml b/tests/psalm-baseline.xml
new file mode 100644
index 0000000..c5ed372
--- /dev/null
+++ b/tests/psalm-baseline.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<files psalm-version="4.17.0@6f4707aa41c9174353a6434bba3fc8840f981d9c">
+  <file src="lib/AppInfo/Application.php">
+    <InvalidArgument occurrences="1">
+      <code>registerEventListener</code>
+    </InvalidArgument>
+  </file>
+</files>