diff --git a/application/forms/Config/Authentication/AutologinBackendForm.php b/application/forms/Config/Authentication/AutologinBackendForm.php
index 4f4df73e3..05e1f201d 100644
--- a/application/forms/Config/Authentication/AutologinBackendForm.php
+++ b/application/forms/Config/Authentication/AutologinBackendForm.php
@@ -82,7 +82,7 @@ class AutologinBackendForm extends Form
      *
      * @return  bool            Whether validation succeeded or not
      */
-    public function isValidAuthenticationBackend(Form $form)
+    public static function isValidAuthenticationBackend(Form $form)
     {
         return true;
     }
diff --git a/application/forms/Config/Authentication/DbBackendForm.php b/application/forms/Config/Authentication/DbBackendForm.php
index 23335f8fa..9e000753c 100644
--- a/application/forms/Config/Authentication/DbBackendForm.php
+++ b/application/forms/Config/Authentication/DbBackendForm.php
@@ -88,7 +88,7 @@ class DbBackendForm extends Form
      */
     public function onSuccess(Request $request)
     {
-        if (false === $this->isValidAuthenticationBackend($this)) {
+        if (false === static::isValidAuthenticationBackend($this)) {
             return false;
         }
     }
@@ -100,7 +100,7 @@ class DbBackendForm extends Form
      *
      * @return  bool            Whether validation succeeded or not
      */
-    public function isValidAuthenticationBackend(Form $form)
+    public static function isValidAuthenticationBackend(Form $form)
     {
         $element = $form->getElement('resource');
 
diff --git a/application/forms/Config/Authentication/LdapBackendForm.php b/application/forms/Config/Authentication/LdapBackendForm.php
index 6056b0911..a93141f37 100644
--- a/application/forms/Config/Authentication/LdapBackendForm.php
+++ b/application/forms/Config/Authentication/LdapBackendForm.php
@@ -108,7 +108,7 @@ class LdapBackendForm extends Form
      */
     public function onSuccess(Request $request)
     {
-        if (false === $this->isValidAuthenticationBackend($this)) {
+        if (false === static::isValidAuthenticationBackend($this)) {
             return false;
         }
     }
@@ -120,7 +120,7 @@ class LdapBackendForm extends Form
      *
      * @return  bool            Whether validation succeeded or not
      */
-    public function isValidAuthenticationBackend(Form $form)
+    public static function isValidAuthenticationBackend(Form $form)
     {
         $element = $form->getElement('resource');
 
diff --git a/application/forms/Config/AuthenticationBackendConfigForm.php b/application/forms/Config/AuthenticationBackendConfigForm.php
index e81382cd4..1e893fd00 100644
--- a/application/forms/Config/AuthenticationBackendConfigForm.php
+++ b/application/forms/Config/AuthenticationBackendConfigForm.php
@@ -201,7 +201,7 @@ class AuthenticationBackendConfigForm extends ConfigForm
     {
         if (($el = $this->getElement('force_creation')) === null || false === $el->isChecked()) {
             $backendForm = $this->getBackendForm($this->getElement('type')->getValue());
-            if (false === $backendForm->isValidAuthenticationBackend($this)) {
+            if (false === $backendForm::isValidAuthenticationBackend($this)) {
                 $this->addElement($this->getForceCreationCheckbox());
                 return false;
             }
diff --git a/application/forms/Config/Resource/DbResourceForm.php b/application/forms/Config/Resource/DbResourceForm.php
index 4fd7297d9..686013386 100644
--- a/application/forms/Config/Resource/DbResourceForm.php
+++ b/application/forms/Config/Resource/DbResourceForm.php
@@ -103,7 +103,7 @@ class DbResourceForm extends Form
      */
     public function onSuccess(Request $request)
     {
-        if (false === $this->isValidResource($this)) {
+        if (false === static::isValidResource($this)) {
             return false;
         }
     }
@@ -115,7 +115,7 @@ class DbResourceForm extends Form
      *
      * @return  bool            Whether validation succeeded or not
      */
-    public function isValidResource(Form $form)
+    public static function isValidResource(Form $form)
     {
         try {
             $resource = ResourceFactory::createResource(new Zend_Config($form->getValues()));
diff --git a/application/forms/Config/Resource/LdapResourceForm.php b/application/forms/Config/Resource/LdapResourceForm.php
index 6196f3a17..6dacc6bea 100644
--- a/application/forms/Config/Resource/LdapResourceForm.php
+++ b/application/forms/Config/Resource/LdapResourceForm.php
@@ -89,7 +89,7 @@ class LdapResourceForm extends Form
      */
     public function onSuccess(Request $request)
     {
-        if (false === $this->isValidResource($this)) {
+        if (false === static::isValidResource($this)) {
             return false;
         }
     }
@@ -101,7 +101,7 @@ class LdapResourceForm extends Form
      *
      * @return  bool            Whether validation succeeded or not
      */
-    public function isValidResource(Form $form)
+    public static function isValidResource(Form $form)
     {
         try {
             $resource = ResourceFactory::createResource(new Zend_Config($form->getValues()));
diff --git a/application/forms/Config/Resource/LivestatusResourceForm.php b/application/forms/Config/Resource/LivestatusResourceForm.php
index 92534f220..3314ca284 100644
--- a/application/forms/Config/Resource/LivestatusResourceForm.php
+++ b/application/forms/Config/Resource/LivestatusResourceForm.php
@@ -50,7 +50,7 @@ class LivestatusResourceForm extends Form
      */
     public function onSuccess(Request $request)
     {
-        if (false === $this->isValidResource($this)) {
+        if (false === static::isValidResource($this)) {
             return false;
         }
     }
@@ -62,7 +62,7 @@ class LivestatusResourceForm extends Form
      *
      * @return  bool            Whether validation succeeded or not
      */
-    public function isValidResource(Form $form)
+    public static function isValidResource(Form $form)
     {
         try {
             $resource = ResourceFactory::createResource(new Zend_Config($form->getValues()));
diff --git a/application/forms/Config/ResourceConfigForm.php b/application/forms/Config/ResourceConfigForm.php
index 8e677cf8b..51677b12f 100644
--- a/application/forms/Config/ResourceConfigForm.php
+++ b/application/forms/Config/ResourceConfigForm.php
@@ -135,7 +135,7 @@ class ResourceConfigForm extends ConfigForm
     {
         if (($el = $this->getElement('force_creation')) === null || false === $el->isChecked()) {
             $resourceForm = $this->getResourceForm($this->getElement('type')->getValue());
-            if (method_exists($resourceForm, 'isValidResource') && false === $resourceForm->isValidResource($this)) {
+            if (method_exists($resourceForm, 'isValidResource') && false === $resourceForm::isValidResource($this)) {
                 $this->addElement($this->getForceCreationCheckbox());
                 return false;
             }
diff --git a/test/php/application/forms/Config/Authentication/DbBackendFormTest.php b/test/php/application/forms/Config/Authentication/DbBackendFormTest.php
index 3364dff60..7474d2703 100644
--- a/test/php/application/forms/Config/Authentication/DbBackendFormTest.php
+++ b/test/php/application/forms/Config/Authentication/DbBackendFormTest.php
@@ -37,7 +37,7 @@ class DbBackendFormTest extends BaseTestCase
         $form->populate(array('resource' => 'test_db_backend'));
 
         $this->assertTrue(
-            $form->isValidAuthenticationBackend($form),
+            DbBackendForm::isValidAuthenticationBackend($form),
             'DbBackendForm claims that a valid authentication backend with users is not valid'
         );
     }
@@ -59,7 +59,7 @@ class DbBackendFormTest extends BaseTestCase
         $form->populate(array('resource' => 'test_db_backend'));
 
         $this->assertFalse(
-            $form->isValidAuthenticationBackend($form),
+            DbBackendForm::isValidAuthenticationBackend($form),
             'DbBackendForm claims that an invalid authentication backend without users is valid'
         );
     }
diff --git a/test/php/application/forms/Config/Authentication/LdapBackendFormTest.php b/test/php/application/forms/Config/Authentication/LdapBackendFormTest.php
index 0335d1f82..c38f26376 100644
--- a/test/php/application/forms/Config/Authentication/LdapBackendFormTest.php
+++ b/test/php/application/forms/Config/Authentication/LdapBackendFormTest.php
@@ -37,7 +37,7 @@ class LdapBackendFormTest extends BaseTestCase
         $form->populate(array('resource' => 'test_ldap_backend'));
 
         $this->assertTrue(
-            $form->isValidAuthenticationBackend($form),
+            LdapBackendForm::isValidAuthenticationBackend($form),
             'LdapBackendForm claims that a valid authentication backend with users is not valid'
         );
     }
@@ -58,7 +58,7 @@ class LdapBackendFormTest extends BaseTestCase
         $form->populate(array('resource' => 'test_ldap_backend'));
 
         $this->assertFalse(
-            $form->isValidAuthenticationBackend($form),
+            LdapBackendForm::isValidAuthenticationBackend($form),
             'LdapBackendForm claims that an invalid authentication backend without users is valid'
         );
     }
diff --git a/test/php/application/forms/Config/Resource/DbResourceFormTest.php b/test/php/application/forms/Config/Resource/DbResourceFormTest.php
index 1b624c49f..a962375b5 100644
--- a/test/php/application/forms/Config/Resource/DbResourceFormTest.php
+++ b/test/php/application/forms/Config/Resource/DbResourceFormTest.php
@@ -30,10 +30,8 @@ class DbResourceFormTest extends BaseTestCase
             Mockery::mock()->shouldReceive('getConnection')->atMost()->twice()->andReturn(Mockery::self())->getMock()
         );
 
-        $form = new DbResourceForm();
-
         $this->assertTrue(
-            $form->isValidResource($form),
+            DbResourceForm::isValidResource(new DbResourceForm()),
             'ResourceForm claims that a valid db resource is not valid'
         );
     }
@@ -48,10 +46,8 @@ class DbResourceFormTest extends BaseTestCase
             Mockery::mock()->shouldReceive('getConnection')->once()->andThrow('\Exception')->getMock()
         );
 
-        $form = new DbResourceForm();
-
         $this->assertFalse(
-            $form->isValidResource($form),
+            DbResourceForm::isValidResource(new DbResourceForm()),
             'ResourceForm claims that an invalid db resource is valid'
         );
     }
diff --git a/test/php/application/forms/Config/Resource/LdapResourceFormTest.php b/test/php/application/forms/Config/Resource/LdapResourceFormTest.php
index 078a11146..b17a01a06 100644
--- a/test/php/application/forms/Config/Resource/LdapResourceFormTest.php
+++ b/test/php/application/forms/Config/Resource/LdapResourceFormTest.php
@@ -30,10 +30,8 @@ class LdapResourceFormTest extends BaseTestCase
             Mockery::mock()->shouldReceive('connect')->getMock()
         );
 
-        $form = new LdapResourceForm();
-
         $this->assertTrue(
-            $form->isValidResource($form),
+            LdapResourceForm::isValidResource(new LdapResourceForm()),
             'ResourceForm claims that a valid ldap resource is not valid'
         );
     }
@@ -48,10 +46,8 @@ class LdapResourceFormTest extends BaseTestCase
             Mockery::mock()->shouldReceive('connect')->once()->andThrow('\Exception')->getMock()
         );
 
-        $form = new LdapResourceForm();
-
         $this->assertFalse(
-            $form->isValidResource($form),
+            LdapResourceForm::isValidResource(new LdapResourceForm()),
             'ResourceForm claims that an invalid ldap resource is valid'
         );
     }
diff --git a/test/php/application/forms/Config/Resource/LivestatusResourceFormTest.php b/test/php/application/forms/Config/Resource/LivestatusResourceFormTest.php
index 300adebed..5748d7c53 100644
--- a/test/php/application/forms/Config/Resource/LivestatusResourceFormTest.php
+++ b/test/php/application/forms/Config/Resource/LivestatusResourceFormTest.php
@@ -31,10 +31,8 @@ class LivestatusResourceFormTest extends BaseTestCase
                 ->shouldReceive('disconnect')->getMock()
         );
 
-        $form = new LivestatusResourceForm();
-
         $this->assertTrue(
-            $form->isValidResource($form),
+            LivestatusResourceForm::isValidResource(new LivestatusResourceForm()),
             'ResourceForm claims that a valid livestatus resource is not valid'
         );
     }
@@ -49,10 +47,8 @@ class LivestatusResourceFormTest extends BaseTestCase
             Mockery::mock()->shouldReceive('connect')->once()->andThrow('\Exception')->getMock()
         );
 
-        $form = new LivestatusResourceForm();
-
         $this->assertFalse(
-            $form->isValidResource($form),
+            LivestatusResourceForm::isValidResource(new LivestatusResourceForm()),
             'ResourceForm claims that an invalid livestatus resource is valid'
         );
     }