diff --git a/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticleCategoryAdminListConfigurator.php b/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticleCategoryAdminListConfigurator.php
index d7bc057f83..733b36d274 100644
--- a/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticleCategoryAdminListConfigurator.php
+++ b/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticleCategoryAdminListConfigurator.php
@@ -75,7 +75,7 @@ public function getQuery()
     {
         $query = parent::getQuery();
 
-        if (!is_null($query)) {
+        if (!\is_null($query)) {
             $query->setHint(
                 \Doctrine\ORM\Query::HINT_CUSTOM_OUTPUT_WALKER,
                 'Gedmo\\Translatable\\Query\\TreeWalker\\TranslationWalker'
diff --git a/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticlePageAdminListConfigurator.php b/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticlePageAdminListConfigurator.php
index 1453d38dec..0b32643798 100644
--- a/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticlePageAdminListConfigurator.php
+++ b/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticlePageAdminListConfigurator.php
@@ -157,7 +157,7 @@ public function getOverviewPage()
         $repository = $this->getOverviewPageRepository();
         $pages = $repository->findActiveOverviewPages();
 
-        if (isset($pages) && count($pages) > 0) {
+        if (isset($pages) && \count($pages) > 0) {
             return $pages[0];
         }
 
diff --git a/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticleTagAdminListConfigurator.php b/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticleTagAdminListConfigurator.php
index 56cf2984c4..7de81e8672 100644
--- a/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticleTagAdminListConfigurator.php
+++ b/src/Kunstmaan/ArticleBundle/AdminList/AbstractArticleTagAdminListConfigurator.php
@@ -75,7 +75,7 @@ public function getQuery()
     {
         $query = parent::getQuery();
 
-        if (!is_null($query)) {
+        if (!\is_null($query)) {
             $query->setHint(
                 \Doctrine\ORM\Query::HINT_CUSTOM_OUTPUT_WALKER,
                 'Gedmo\\Translatable\\Query\\TreeWalker\\TranslationWalker'
diff --git a/src/Kunstmaan/ArticleBundle/Entity/AbstractAuthor.php b/src/Kunstmaan/ArticleBundle/Entity/AbstractAuthor.php
index 19ea35ecaa..86e835deb2 100644
--- a/src/Kunstmaan/ArticleBundle/Entity/AbstractAuthor.php
+++ b/src/Kunstmaan/ArticleBundle/Entity/AbstractAuthor.php
@@ -15,7 +15,7 @@ class AbstractAuthor extends AbstractEntity
      */
     public function __construct()
     {
-        if (get_class($this) === AbstractAuthor::class) {
+        if (\get_class($this) === AbstractAuthor::class) {
             @trigger_error(sprintf('Instantiating the "%s" class is deprecated in KunstmaanArticleBundle 5.1 and will be made abstract in KunstmaanArticleBundle 6.0. Extend your implementation from this class instead.', __CLASS__), E_USER_DEPRECATED);
         }
     }
diff --git a/src/Kunstmaan/ArticleBundle/Entity/AbstractCategory.php b/src/Kunstmaan/ArticleBundle/Entity/AbstractCategory.php
index f19b05829c..9dddaacfcd 100644
--- a/src/Kunstmaan/ArticleBundle/Entity/AbstractCategory.php
+++ b/src/Kunstmaan/ArticleBundle/Entity/AbstractCategory.php
@@ -15,7 +15,7 @@ class AbstractCategory extends AbstractEntity implements Translatable
      */
     public function __construct()
     {
-        if (get_class($this) === AbstractCategory::class) {
+        if (\get_class($this) === AbstractCategory::class) {
             @trigger_error(sprintf('Instantiating the "%s" class is deprecated in KunstmaanArticleBundle 5.1 and will be made abstract in KunstmaanArticleBundle 6.0. Extend your implementation from this class instead.', __CLASS__), E_USER_DEPRECATED);
         }
     }
diff --git a/src/Kunstmaan/ArticleBundle/Entity/AbstractTag.php b/src/Kunstmaan/ArticleBundle/Entity/AbstractTag.php
index 8450ead574..7ca6e7529e 100644
--- a/src/Kunstmaan/ArticleBundle/Entity/AbstractTag.php
+++ b/src/Kunstmaan/ArticleBundle/Entity/AbstractTag.php
@@ -15,7 +15,7 @@ class AbstractTag extends AbstractEntity implements Translatable
      */
     public function __construct()
     {
-        if (get_class($this) === AbstractTag::class) {
+        if (\get_class($this) === AbstractTag::class) {
             @trigger_error(sprintf('Instantiating the "%s" class is deprecated in KunstmaanArticleBundle 5.1 and will be made abstract in KunstmaanArticleBundle 6.0. Extend your implementation from this class instead.', __CLASS__), E_USER_DEPRECATED);
         }
     }
diff --git a/src/Kunstmaan/ArticleBundle/Router/TagCategoryRouter.php b/src/Kunstmaan/ArticleBundle/Router/TagCategoryRouter.php
index d11eaf81c4..6948cea5ae 100644
--- a/src/Kunstmaan/ArticleBundle/Router/TagCategoryRouter.php
+++ b/src/Kunstmaan/ArticleBundle/Router/TagCategoryRouter.php
@@ -3,7 +3,6 @@
 namespace Kunstmaan\ArticleBundle\Router;
 
 use Kunstmaan\NodeBundle\Router\SlugRouter;
-use Symfony\Component\Routing\Route;
 use Symfony\Component\Routing\RouteCollection;
 use Symfony\Component\Translation\TranslatorInterface;
 
@@ -14,7 +13,7 @@ class TagCategoryRouter extends SlugRouter
      */
     public function getRouteCollection()
     {
-        if (!is_null($this->routeCollection)) {
+        if (!\is_null($this->routeCollection)) {
             return $this->routeCollection;
         }
         $this->routeCollection = new RouteCollection();
diff --git a/src/Kunstmaan/ArticleBundle/Tests/unit/AdminList/AbstractArticleAuthorAdminListConfiguratorTest.php b/src/Kunstmaan/ArticleBundle/Tests/unit/AdminList/AbstractArticleAuthorAdminListConfiguratorTest.php
index bf557dbc80..35d9823d5e 100644
--- a/src/Kunstmaan/ArticleBundle/Tests/unit/AdminList/AbstractArticleAuthorAdminListConfiguratorTest.php
+++ b/src/Kunstmaan/ArticleBundle/Tests/unit/AdminList/AbstractArticleAuthorAdminListConfiguratorTest.php
@@ -30,7 +30,7 @@ protected function setUp()
 
         $acl = $this->createMock(AclHelper::class);
 
-        $this->object = new AbstractArticleAuthorAdminListConfigurator($em, $acl, 'nl', 'admin');
+        $this->object = new AbstractArticleAuthorAdminListConfigurator($em, $acl, 'nl');
     }
 
     public function testGetters()
diff --git a/src/Kunstmaan/ArticleBundle/Tests/unit/AdminList/AbstractArticlePageAdminListConfiguratorTest.php b/src/Kunstmaan/ArticleBundle/Tests/unit/AdminList/AbstractArticlePageAdminListConfiguratorTest.php
index 36bc75fbfe..138134a833 100644
--- a/src/Kunstmaan/ArticleBundle/Tests/unit/AdminList/AbstractArticlePageAdminListConfiguratorTest.php
+++ b/src/Kunstmaan/ArticleBundle/Tests/unit/AdminList/AbstractArticlePageAdminListConfiguratorTest.php
@@ -107,7 +107,6 @@ public function testGetUrls()
         $this->assertEquals('KunstmaanNodeBundle_nodes_edit', $url['path']);
         $this->assertCount(1, $url['params']);
         $this->assertEquals(1314, $url['params']['id']);
-        $url = $this->object->getEditUrlFor($item);
 
         $url = $this->object->getDeleteUrlFor($item);
 
diff --git a/src/Kunstmaan/ArticleBundle/Tests/unit/Entity/AbstractArticleOverviewPageTest.php b/src/Kunstmaan/ArticleBundle/Tests/unit/Entity/AbstractArticleOverviewPageTest.php
index 42ef2c0b94..0e03dd83b4 100644
--- a/src/Kunstmaan/ArticleBundle/Tests/unit/Entity/AbstractArticleOverviewPageTest.php
+++ b/src/Kunstmaan/ArticleBundle/Tests/unit/Entity/AbstractArticleOverviewPageTest.php
@@ -23,7 +23,7 @@ public function testGettersAndSetters()
         $entity = new ArticleOverViewPage();
         $this->assertEquals('KunstmaanArticleBundle:AbstractArticleOverviewPage:service', $entity->getControllerAction());
         $this->assertEquals('KunstmaanArticleBundle:AbstractArticleOverviewPage:view.html.twig', $entity->getDefaultView());
-        $this->assertTrue(is_array($entity->getPossibleChildTypes()));
-        $this->assertTrue(is_array($entity->getPagePartAdminConfigurations()));
+        $this->assertInternalType('array', $entity->getPossibleChildTypes());
+        $this->assertInternalType('array', $entity->getPagePartAdminConfigurations());
     }
 }
diff --git a/src/Kunstmaan/ArticleBundle/Tests/unit/Entity/AbstractArticlePageTest.php b/src/Kunstmaan/ArticleBundle/Tests/unit/Entity/AbstractArticlePageTest.php
index aec33fffca..ecd7a22441 100644
--- a/src/Kunstmaan/ArticleBundle/Tests/unit/Entity/AbstractArticlePageTest.php
+++ b/src/Kunstmaan/ArticleBundle/Tests/unit/Entity/AbstractArticlePageTest.php
@@ -31,7 +31,7 @@ public function testGettersAndSetters()
         $this->assertEquals('NASA', $entity->getTitle());
         $this->assertInstanceOf(DateTime::class, $entity->getDate());
         $this->assertEquals(AbstractArticlePageAdminType::class, $entity->getAdminType());
-        $this->assertTrue(is_array($entity->getPossibleChildTypes()));
-        $this->assertTrue(is_array($entity->getPagePartAdminConfigurations()));
+        $this->assertInternalType('array', $entity->getPossibleChildTypes());
+        $this->assertInternalType('array', $entity->getPagePartAdminConfigurations());
     }
 }
diff --git a/src/Kunstmaan/ArticleBundle/Tests/unit/PagePartAdmin/AbstractArticleOverviewPagePagePartAdminConfiguratorTest.php b/src/Kunstmaan/ArticleBundle/Tests/unit/PagePartAdmin/AbstractArticleOverviewPagePagePartAdminConfiguratorTest.php
index caf6d78163..7ffb68ac8f 100644
--- a/src/Kunstmaan/ArticleBundle/Tests/unit/PagePartAdmin/AbstractArticleOverviewPagePagePartAdminConfiguratorTest.php
+++ b/src/Kunstmaan/ArticleBundle/Tests/unit/PagePartAdmin/AbstractArticleOverviewPagePagePartAdminConfiguratorTest.php
@@ -18,7 +18,7 @@ public function testGettersAndSetters()
         $this->assertEquals('main', $entity->getContext());
         $this->assertEquals('', $entity->getWidgetTemplate());
         $types = $entity->getPossiblePagePartTypes();
-        $this->assertTrue(is_array($types));
+        $this->assertInternalType('array', $types);
         foreach ($types as $type) {
             $this->assertArrayHasKey('name', $type);
             $this->assertArrayHasKey('class', $type);
diff --git a/src/Kunstmaan/ArticleBundle/Tests/unit/PagePartAdmin/AbstractArticlePagePagePartAdminConfiguratorTest.php b/src/Kunstmaan/ArticleBundle/Tests/unit/PagePartAdmin/AbstractArticlePagePagePartAdminConfiguratorTest.php
index 950b84c9fd..41e1b25819 100644
--- a/src/Kunstmaan/ArticleBundle/Tests/unit/PagePartAdmin/AbstractArticlePagePagePartAdminConfiguratorTest.php
+++ b/src/Kunstmaan/ArticleBundle/Tests/unit/PagePartAdmin/AbstractArticlePagePagePartAdminConfiguratorTest.php
@@ -18,7 +18,7 @@ public function testGettersAndSetters()
         $this->assertEquals('main', $entity->getContext());
         $this->assertEquals('', $entity->getWidgetTemplate());
         $types = $entity->getPossiblePagePartTypes();
-        $this->assertTrue(is_array($types));
+        $this->assertInternalType('array', $types);
         foreach ($types as $type) {
             $this->assertArrayHasKey('name', $type);
             $this->assertArrayHasKey('class', $type);
diff --git a/src/Kunstmaan/ArticleBundle/Twig/ArticleTwigExtension.php b/src/Kunstmaan/ArticleBundle/Twig/ArticleTwigExtension.php
index e141c18c36..00848a1efe 100644
--- a/src/Kunstmaan/ArticleBundle/Twig/ArticleTwigExtension.php
+++ b/src/Kunstmaan/ArticleBundle/Twig/ArticleTwigExtension.php
@@ -34,7 +34,7 @@ public function __construct(EntityManagerInterface $em, RouterInterface $router)
         $this->em = $em;
         $this->router = $router;
 
-        if (func_num_args() > 2) {
+        if (\func_num_args() > 2) {
             @trigger_error(sprintf('Passing the "request_stack" service as the third argument in "%s" is deprecated in KunstmaanArticleBundle 5.1 and will be removed in KunstmaanArticleBundle 6.0. Remove the "request_stack" argument from your service definition.', __METHOD__), E_USER_DEPRECATED);
         }
     }
@@ -190,7 +190,7 @@ protected function articleRouteExists($type, $locale)
         $routeName = sprintf('_slug_%s_%s', $type, $locale);
 
         try {
-            return !is_null($this->router->getRouteCollection()->get($routeName));
+            return !\is_null($this->router->getRouteCollection()->get($routeName));
         } catch (\Exception $e) {
             return false;
         }