diff --git a/src/CoreBundle/Command/SonataDumpDoctrineMetaCommand.php b/src/CoreBundle/Command/SonataDumpDoctrineMetaCommand.php
index aa4d77c4..1aa967e9 100644
--- a/src/CoreBundle/Command/SonataDumpDoctrineMetaCommand.php
+++ b/src/CoreBundle/Command/SonataDumpDoctrineMetaCommand.php
@@ -144,7 +144,7 @@ private function filterMetadata(array $metadata, InputInterface $input, OutputIn
         if ($baseEntity) {
             $allowedMeta = array_filter(
                 $metadata,
-                function ($meta) use ($baseEntity) {
+                static function ($meta) use ($baseEntity) {
                     /* @var \Doctrine\ORM\Mapping\ClassMetadata $meta */
                     return $meta->rootEntityName === $baseEntity;
                 }
@@ -152,7 +152,7 @@ function ($meta) use ($baseEntity) {
         } elseif ($regex) {
             $allowedMeta = array_filter(
                 $metadata,
-                function ($meta) use ($regex) {
+                static function ($meta) use ($regex) {
                     /* @var \Doctrine\ORM\Mapping\ClassMetadata $meta */
                     return preg_match($regex, $meta->rootEntityName);
                 }
diff --git a/src/CoreBundle/Exporter/Exporter.php b/src/CoreBundle/Exporter/Exporter.php
index ad6f6041..8501a586 100644
--- a/src/CoreBundle/Exporter/Exporter.php
+++ b/src/CoreBundle/Exporter/Exporter.php
@@ -68,7 +68,7 @@ public function getResponse($format, $filename, SourceIteratorInterface $source)
                 throw new \RuntimeException('Invalid format');
         }
 
-        $callback = function () use ($source, $writer) {
+        $callback = static function () use ($source, $writer) {
             $handler = Handler::create($source, $writer);
             $handler->export();
         };
diff --git a/src/Form/Test/AbstractWidgetTestCase.php b/src/Form/Test/AbstractWidgetTestCase.php
index f8d97702..5deebc1d 100644
--- a/src/Form/Test/AbstractWidgetTestCase.php
+++ b/src/Form/Test/AbstractWidgetTestCase.php
@@ -166,7 +166,7 @@ final protected function renderWidget(FormView $view, array $vars = [])
      */
     final protected function cleanHtmlWhitespace($html)
     {
-        return preg_replace_callback('/\s*>([^<]+)</', function ($value) {
+        return preg_replace_callback('/\s*>([^<]+)</', static function ($value) {
             return '>'.trim($value[1]).'<';
         }, $html);
     }
@@ -178,7 +178,7 @@ final protected function cleanHtmlWhitespace($html)
      */
     final protected function cleanHtmlAttributeWhitespace($html)
     {
-        return preg_replace_callback('~<([A-Z0-9]+) \K(.*?)>~i', function ($m) {
+        return preg_replace_callback('~<([A-Z0-9]+) \K(.*?)>~i', static function ($m) {
             return preg_replace('~\s*~', '', $m[0]);
         }, $html);
     }
diff --git a/src/Form/Type/BasePickerType.php b/src/Form/Type/BasePickerType.php
index a8fdae9d..4c218ebf 100644
--- a/src/Form/Type/BasePickerType.php
+++ b/src/Form/Type/BasePickerType.php
@@ -124,7 +124,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
             if (false !== strpos($key, 'dp_')) {
                 // We remove 'dp_' and camelize the options names
                 $dpKey = substr($key, 3);
-                $dpKey = preg_replace_callback('/_([a-z])/', function ($c) {
+                $dpKey = preg_replace_callback('/_([a-z])/', static function ($c) {
                     return strtoupper($c[1]);
                 }, $dpKey);
 
diff --git a/src/Form/Type/BooleanType.php b/src/Form/Type/BooleanType.php
index dbb2a321..18caa9be 100644
--- a/src/Form/Type/BooleanType.php
+++ b/src/Form/Type/BooleanType.php
@@ -68,7 +68,7 @@ public function configureOptions(OptionsResolver $resolver)
                 'label_type_no' => self::TYPE_NO,
             ],
             // Use directly translation_domain in SonataCoreBundle 4.0
-            'translation_domain' => function (Options $options) {
+            'translation_domain' => static function (Options $options) {
                 if ($options['catalogue']) {
                     return $options['catalogue'];
                 }
diff --git a/src/Form/Type/ImmutableArrayType.php b/src/Form/Type/ImmutableArrayType.php
index 06965b5c..2cc20f65 100644
--- a/src/Form/Type/ImmutableArrayType.php
+++ b/src/Form/Type/ImmutableArrayType.php
@@ -61,7 +61,7 @@ public function configureOptions(OptionsResolver $resolver)
             'keys' => [],
         ]);
 
-        $resolver->setAllowedValues('keys', function ($value) {
+        $resolver->setAllowedValues('keys', static function ($value) {
             foreach ($value as $subValue) {
                 if (!$subValue instanceof FormBuilderInterface && (!\is_array($subValue) || 3 !== \count($subValue))) {
                     return false;
diff --git a/src/Form/Validator/Constraints/InlineConstraint.php b/src/Form/Validator/Constraints/InlineConstraint.php
index 0db51cf6..64d221bd 100755
--- a/src/Form/Validator/Constraints/InlineConstraint.php
+++ b/src/Form/Validator/Constraints/InlineConstraint.php
@@ -67,7 +67,7 @@ public function __wakeup()
             return;
         }
 
-        $this->method = function () {
+        $this->method = static function () {
         };
 
         $this->serializingWarning = true;
diff --git a/tests/CoreBundle/Form/EventListener/ResizeFormListenerTest.php b/tests/CoreBundle/Form/EventListener/ResizeFormListenerTest.php
index cae212c3..1279e535 100644
--- a/tests/CoreBundle/Form/EventListener/ResizeFormListenerTest.php
+++ b/tests/CoreBundle/Form/EventListener/ResizeFormListenerTest.php
@@ -197,7 +197,7 @@ public function testPreSubmitDataWithClosure()
 
         $data = ['baz' => 'caz'];
 
-        $closure = function () use ($data) {
+        $closure = static function () use ($data) {
             return $data['baz'];
         };
 
diff --git a/tests/CoreBundle/Form/Type/BooleanTypeTest.php b/tests/CoreBundle/Form/Type/BooleanTypeTest.php
index 7ef43c78..ba23d28b 100644
--- a/tests/CoreBundle/Form/Type/BooleanTypeTest.php
+++ b/tests/CoreBundle/Form/Type/BooleanTypeTest.php
@@ -52,7 +52,7 @@ public function testBuildForm()
             'catalogue' => 'SonataCoreBundle',
 
             // Use directly translation_domain in SonataCoreBundle 4.0
-            'translation_domain' => function (Options $options) {
+            'translation_domain' => static function (Options $options) {
                 if ($options['catalogue']) {
                     return $options['catalogue'];
                 }
diff --git a/tests/CoreBundle/Form/Type/EqualTypeTest.php b/tests/CoreBundle/Form/Type/EqualTypeTest.php
index b4ae6308..10b67979 100644
--- a/tests/CoreBundle/Form/Type/EqualTypeTest.php
+++ b/tests/CoreBundle/Form/Type/EqualTypeTest.php
@@ -60,7 +60,7 @@ public function testGetDefaultOptions()
 
         $mock->expects($this->exactly(0))
             ->method('trans')
-            ->will($this->returnCallback(function ($arg) {
+            ->will($this->returnCallback(static function ($arg) {
                 return $arg;
             })
             );
diff --git a/tests/CoreBundle/Form/Type/ImmutableArrayTypeTest.php b/tests/CoreBundle/Form/Type/ImmutableArrayTypeTest.php
index 498cce69..0ac2d01c 100644
--- a/tests/CoreBundle/Form/Type/ImmutableArrayTypeTest.php
+++ b/tests/CoreBundle/Form/Type/ImmutableArrayTypeTest.php
@@ -82,19 +82,19 @@ public function testCallback()
 
         $builder = $this->createMock(TestFormBuilderInterface::class);
         $builder->expects($this->once())->method('add')->with(
-            $this->callback(function ($name) {
+            $this->callback(static function ($name) {
                 return 'ttl' === $name;
             }),
-            $this->callback(function ($name) {
+            $this->callback(static function ($name) {
                 return TextType::class === $name;
             }),
-            $this->callback(function ($name) {
+            $this->callback(static function ($name) {
                 return $name === [1 => '1'];
             })
         );
 
         $self = $this;
-        $optionsCallback = function ($builder, $name, $type, $extra) use ($self) {
+        $optionsCallback = static function ($builder, $name, $type, $extra) use ($self) {
             $self->assertEquals(['foo', 'bar'], $extra);
             $self->assertEquals($name, 'ttl');
             $self->assertEquals($type, TextType::class);
diff --git a/tests/CoreBundle/Validator/Constraints/InlineConstraintTest.php b/tests/CoreBundle/Validator/Constraints/InlineConstraintTest.php
index 525d472f..8c5838de 100755
--- a/tests/CoreBundle/Validator/Constraints/InlineConstraintTest.php
+++ b/tests/CoreBundle/Validator/Constraints/InlineConstraintTest.php
@@ -34,14 +34,14 @@ public function testIsClosure()
         $constraint = new InlineConstraint(['service' => 'foo', 'method' => 'bar']);
         $this->assertFalse($constraint->isClosure());
 
-        $constraint = new InlineConstraint(['service' => 'foo', 'method' => function () {
+        $constraint = new InlineConstraint(['service' => 'foo', 'method' => static function () {
         }, 'serializingWarning' => true]);
         $this->assertTrue($constraint->isClosure());
     }
 
     public function testGetClosure()
     {
-        $closure = function () {
+        $closure = static function () {
             return 'FOO';
         };
 
@@ -75,7 +75,7 @@ public function testGetService()
 
     public function testClosureSerialization()
     {
-        $constraint = new InlineConstraint(['service' => 'foo', 'method' => function () {
+        $constraint = new InlineConstraint(['service' => 'foo', 'method' => static function () {
         }, 'serializingWarning' => true]);
 
         $expected = 'O:50:"Sonata\Form\Validator\Constraints\InlineConstraint":0:{}';
diff --git a/tests/CoreBundle/Validator/InlineValidatorTest.php b/tests/CoreBundle/Validator/InlineValidatorTest.php
index 73de12bc..7f417585 100644
--- a/tests/CoreBundle/Validator/InlineValidatorTest.php
+++ b/tests/CoreBundle/Validator/InlineValidatorTest.php
@@ -72,7 +72,7 @@ public function testValidateWithConstraintIsClosure()
 
         $constraint->expects($this->once())
             ->method('getClosure')
-            ->willReturn(function (ErrorElement $errorElement, $value) {
+            ->willReturn(static function (ErrorElement $errorElement, $value) {
                 throw new ValidatorException($errorElement->getSubject().' is equal to '.$value);
             });
 
diff --git a/tests/Form/EventListener/ResizeFormListenerTest.php b/tests/Form/EventListener/ResizeFormListenerTest.php
index eb58abd1..ba4a0834 100644
--- a/tests/Form/EventListener/ResizeFormListenerTest.php
+++ b/tests/Form/EventListener/ResizeFormListenerTest.php
@@ -177,7 +177,7 @@ public function testPreSubmitDataWithClosure()
 
         $data = ['baz' => 'caz'];
 
-        $closure = function () use ($data) {
+        $closure = static function () use ($data) {
             return $data['baz'];
         };
 
diff --git a/tests/Form/Type/BooleanTypeTest.php b/tests/Form/Type/BooleanTypeTest.php
index ca90a01a..6978d1af 100644
--- a/tests/Form/Type/BooleanTypeTest.php
+++ b/tests/Form/Type/BooleanTypeTest.php
@@ -49,7 +49,7 @@ public function testBuildForm()
             'catalogue' => 'SonataCoreBundle',
 
             // Use directly translation_domain in SonataCoreBundle 4.0
-            'translation_domain' => function (Options $options) {
+            'translation_domain' => static function (Options $options) {
                 if ($options['catalogue']) {
                     return $options['catalogue'];
                 }
diff --git a/tests/Form/Type/EqualTypeTest.php b/tests/Form/Type/EqualTypeTest.php
index 3c50bf2f..146750f9 100644
--- a/tests/Form/Type/EqualTypeTest.php
+++ b/tests/Form/Type/EqualTypeTest.php
@@ -57,7 +57,7 @@ public function testGetDefaultOptions()
 
         $mock->expects($this->exactly(0))
             ->method('trans')
-            ->will($this->returnCallback(function ($arg) {
+            ->will($this->returnCallback(static function ($arg) {
                 return $arg;
             })
             );
diff --git a/tests/Form/Type/ImmutableArrayTypeTest.php b/tests/Form/Type/ImmutableArrayTypeTest.php
index 2473aa67..7a2b34cc 100644
--- a/tests/Form/Type/ImmutableArrayTypeTest.php
+++ b/tests/Form/Type/ImmutableArrayTypeTest.php
@@ -79,19 +79,19 @@ public function testCallback()
 
         $builder = $this->createMock(TestFormBuilderInterface::class);
         $builder->expects($this->once())->method('add')->with(
-            $this->callback(function ($name) {
+            $this->callback(static function ($name) {
                 return 'ttl' === $name;
             }),
-            $this->callback(function ($name) {
+            $this->callback(static function ($name) {
                 return TextType::class === $name;
             }),
-            $this->callback(function ($name) {
+            $this->callback(static function ($name) {
                 return $name === [1 => '1'];
             })
         );
 
         $self = $this;
-        $optionsCallback = function ($builder, $name, $type, $extra) use ($self) {
+        $optionsCallback = static function ($builder, $name, $type, $extra) use ($self) {
             $self->assertEquals(['foo', 'bar'], $extra);
             $self->assertEquals($name, 'ttl');
             $self->assertEquals($type, TextType::class);
diff --git a/tests/Form/Validator/Constraints/InlineConstraintTest.php b/tests/Form/Validator/Constraints/InlineConstraintTest.php
index 7f8d3dcb..3e646c93 100755
--- a/tests/Form/Validator/Constraints/InlineConstraintTest.php
+++ b/tests/Form/Validator/Constraints/InlineConstraintTest.php
@@ -32,14 +32,14 @@ public function testIsClosure()
         $constraint = new InlineConstraint(['service' => 'foo', 'method' => 'bar']);
         $this->assertFalse($constraint->isClosure());
 
-        $constraint = new InlineConstraint(['service' => 'foo', 'method' => function () {
+        $constraint = new InlineConstraint(['service' => 'foo', 'method' => static function () {
         }, 'serializingWarning' => true]);
         $this->assertTrue($constraint->isClosure());
     }
 
     public function testGetClosure()
     {
-        $closure = function () {
+        $closure = static function () {
             return 'FOO';
         };
 
@@ -73,7 +73,7 @@ public function testGetService()
 
     public function testClosureSerialization()
     {
-        $constraint = new InlineConstraint(['service' => 'foo', 'method' => function () {
+        $constraint = new InlineConstraint(['service' => 'foo', 'method' => static function () {
         }, 'serializingWarning' => true]);
 
         $expected = 'O:50:"Sonata\Form\Validator\Constraints\InlineConstraint":0:{}';
diff --git a/tests/Form/Validator/InlineValidatorTest.php b/tests/Form/Validator/InlineValidatorTest.php
index 80bce98f..c4caf498 100644
--- a/tests/Form/Validator/InlineValidatorTest.php
+++ b/tests/Form/Validator/InlineValidatorTest.php
@@ -70,7 +70,7 @@ public function testValidateWithConstraintIsClosure()
 
         $constraint->expects($this->once())
             ->method('getClosure')
-            ->willReturn(function (ErrorElement $errorElement, $value) {
+            ->willReturn(static function (ErrorElement $errorElement, $value) {
                 throw new ValidatorException($errorElement->getSubject().' is equal to '.$value);
             });