diff --git a/.php_cs.dist b/.php_cs.dist
index 338811d8..bc32a66b 100644
--- a/.php_cs.dist
+++ b/.php_cs.dist
@@ -43,6 +43,7 @@ $rules = [
     '@PHP71Migration:risky' => true,
     'compact_nullable_typehint' => true,
     'void_return' => null,
+    'static_lambda' => true,
     'strict_comparison' => true,
     'strict_param' => true,
     'php_unit_strict' => true,
diff --git a/src/DependencyInjection/SonataNotificationExtension.php b/src/DependencyInjection/SonataNotificationExtension.php
index 977ac937..23232164 100644
--- a/src/DependencyInjection/SonataNotificationExtension.php
+++ b/src/DependencyInjection/SonataNotificationExtension.php
@@ -468,7 +468,7 @@ protected function createAMQPBackend(ContainerBuilder $container, $exchange, $na
      */
     private function getQueuesParameters($name, array $queues)
     {
-        $params = array_unique(array_map(function ($q) use ($name) {
+        $params = array_unique(array_map(static function ($q) use ($name) {
             return $q[$name];
         }, $queues));
 
diff --git a/tests/Backend/PostponeRuntimeBackendTest.php b/tests/Backend/PostponeRuntimeBackendTest.php
index dcf2efff..cd5091c7 100644
--- a/tests/Backend/PostponeRuntimeBackendTest.php
+++ b/tests/Backend/PostponeRuntimeBackendTest.php
@@ -84,7 +84,7 @@ public function testLiveEnvironment(): void
 
         $phpunit = $this;
         $phpunit->passed = false;
-        $dispatcher->addListener('notification.demo', function (ConsumerEventInterface $event) use ($phpunit, $message): void {
+        $dispatcher->addListener('notification.demo', static function (ConsumerEventInterface $event) use ($phpunit, $message): void {
             $phpunit->assertSame($message, $event->getMessage());
 
             $phpunit->passed = true;
@@ -111,7 +111,7 @@ public function testRecursiveMessage(): void
         $phpunit->passed1 = false;
         $phpunit->passed2 = false;
 
-        $dispatcher->addListener('notification.demo1', function (ConsumerEventInterface $event) use ($phpunit, $message1, $message2, $backend, $dispatcher): void {
+        $dispatcher->addListener('notification.demo1', static function (ConsumerEventInterface $event) use ($phpunit, $message1, $message2, $backend, $dispatcher): void {
             $phpunit->assertSame($message1, $event->getMessage());
 
             $phpunit->passed1 = true;
@@ -119,7 +119,7 @@ public function testRecursiveMessage(): void
             $backend->publish($message2);
         });
 
-        $dispatcher->addListener('notification.demo2', function (ConsumerEventInterface $event) use ($phpunit, $message2): void {
+        $dispatcher->addListener('notification.demo2', static function (ConsumerEventInterface $event) use ($phpunit, $message2): void {
             $phpunit->assertSame($message2, $event->getMessage());
 
             $phpunit->passed2 = true;
diff --git a/tests/Entity/MessageManagerTest.php b/tests/Entity/MessageManagerTest.php
index 03f0ddb4..bc86ac56 100644
--- a/tests/Entity/MessageManagerTest.php
+++ b/tests/Entity/MessageManagerTest.php
@@ -59,7 +59,7 @@ public function testGetPager(): void
     {
         $self = $this;
         $this
-            ->getMessageManager(function ($qb) use ($self): void {
+            ->getMessageManager(static function ($qb) use ($self): void {
                 $qb->expects($self->once())->method('getRootAliases')->will($self->returnValue(['m']));
                 $qb->expects($self->never())->method('andWhere');
                 $qb->expects($self->once())->method('setParameters')->with([]);
@@ -78,7 +78,7 @@ public function testGetPagerWithInvalidSort(): void
 
         $self = $this;
         $this
-            ->getMessageManager(function ($qb) use ($self): void {
+            ->getMessageManager(static function ($qb) use ($self): void {
             })
             ->getPager([], 1, 10, ['invalid' => 'ASC']);
     }
@@ -87,7 +87,7 @@ public function testGetPagerWithMultipleSort(): void
     {
         $self = $this;
         $this
-            ->getMessageManager(function ($qb) use ($self): void {
+            ->getMessageManager(static function ($qb) use ($self): void {
                 $qb->expects($self->once())->method('getRootAliases')->will($self->returnValue(['m']));
                 $qb->expects($self->never())->method('andWhere');
                 $qb->expects($self->once())->method('setParameters')->with([]);
@@ -113,7 +113,7 @@ public function testGetPagerWithOpenedMessages(): void
     {
         $self = $this;
         $this
-            ->getMessageManager(function ($qb) use ($self): void {
+            ->getMessageManager(static function ($qb) use ($self): void {
                 $qb->expects($self->once())->method('getRootAliases')->will($self->returnValue(['m']));
                 $qb->expects($self->once())->method('andWhere')->with($self->equalTo('m.state = :state'));
                 $qb->expects($self->once())->method('setParameters')->with($self->equalTo([
@@ -127,7 +127,7 @@ public function testGetPagerWithCanceledMessages(): void
     {
         $self = $this;
         $this
-            ->getMessageManager(function ($qb) use ($self): void {
+            ->getMessageManager(static function ($qb) use ($self): void {
                 $qb->expects($self->once())->method('getRootAliases')->will($self->returnValue(['m']));
                 $qb->expects($self->once())->method('andWhere')->with($self->equalTo('m.state = :state'));
                 $qb->expects($self->once())->method('setParameters')->with($self->equalTo([
@@ -141,7 +141,7 @@ public function testGetPagerWithInProgressMessages(): void
     {
         $self = $this;
         $this
-            ->getMessageManager(function ($qb) use ($self): void {
+            ->getMessageManager(static function ($qb) use ($self): void {
                 $qb->expects($self->once())->method('getRootAliases')->will($self->returnValue(['m']));
                 $qb->expects($self->once())->method('andWhere')->with($self->equalTo('m.state = :state'));
                 $qb->expects($self->once())->method('setParameters')->with($self->equalTo([