diff --git a/library/Director/Data/Db/ServiceSetQueryBuilder.php b/library/Director/Data/Db/ServiceSetQueryBuilder.php
index 7841d1ee..597fe0e6 100644
--- a/library/Director/Data/Db/ServiceSetQueryBuilder.php
+++ b/library/Director/Data/Db/ServiceSetQueryBuilder.php
@@ -27,6 +27,8 @@ class ServiceSetQueryBuilder
     /** @var \Zend_Db_Adapter_Abstract */
     protected $db;
 
+    protected $searchColumns = [];
+
     /**
      * @param ?UuidInterface $uuid
      */
diff --git a/library/Director/Test/TestSuiteLint.php b/library/Director/Test/TestSuiteLint.php
index 41941eb5..0010c286 100644
--- a/library/Director/Test/TestSuiteLint.php
+++ b/library/Director/Test/TestSuiteLint.php
@@ -10,6 +10,8 @@ class TestSuiteLint extends TestSuite
 
     protected $failed;
 
+    protected $result = [];
+
     public function run()
     {
         $this->checked = $this->failed = array();
diff --git a/library/Director/Test/TestSuiteUnit.php b/library/Director/Test/TestSuiteUnit.php
index 8156ebaa..93dc6925 100644
--- a/library/Director/Test/TestSuiteUnit.php
+++ b/library/Director/Test/TestSuiteUnit.php
@@ -4,6 +4,8 @@ namespace Icinga\Module\Director\Test;
 
 abstract class TestSuiteUnit
 {
+    private $testdoxFile;
+
     public function run()
     {
     }
@@ -15,7 +17,7 @@ abstract class TestSuiteUnit
     public function __destruct()
     {
         if ($this->testdoxFile && file_exists($this->testdoxFile)) {
-            unlink($this->testDoxfile);
+            unlink($this->testdoxFile);
         }
     }
 
diff --git a/library/Director/Web/Form/IplElement/ExtensibleSetElement.php b/library/Director/Web/Form/IplElement/ExtensibleSetElement.php
index a4dbb207..5df4983e 100644
--- a/library/Director/Web/Form/IplElement/ExtensibleSetElement.php
+++ b/library/Director/Web/Form/IplElement/ExtensibleSetElement.php
@@ -26,6 +26,8 @@ class ExtensibleSetElement extends BaseHtmlElement
 
     private $description;
 
+    private $descriptions;
+
     private $multiOptions;
 
     private $validOptions;