diff --git a/src/CoreBundle/Migrations/Schema/V200/Version20211008133540.php b/src/CoreBundle/Migrations/Schema/V200/Version20211008133540.php
index 75ebbafa54..1a3c15f80f 100644
--- a/src/CoreBundle/Migrations/Schema/V200/Version20211008133540.php
+++ b/src/CoreBundle/Migrations/Schema/V200/Version20211008133540.php
@@ -21,7 +21,7 @@ final class Version20211008133540 extends AbstractMigrationChamilo
         if ($table->hasColumn('c_tool_id')) {
             if (!$table->hasForeignKey('FK_D705267B1DF6B517')) {
                 $this->addSql(
-                    'ALTER TABLE c_tool_intro ADD CONSTRAINT FK_D705267B1DF6B517 FOREIGN KEY (c_tool_id) REFERENCES c_tool (iid);'
+                    'ALTER TABLE c_tool_intro ADD CONSTRAINT FK_D705267B1DF6B517 FOREIGN KEY (c_tool_id) REFERENCES c_tool (iid) ON DELETE CASCADE'
                 );
             }
             if (!$table->hasIndex('IDX_D705267B1DF6B517')) {
diff --git a/src/CourseBundle/Entity/CToolIntro.php b/src/CourseBundle/Entity/CToolIntro.php
index b018e7d2e3..4d6bea1cd1 100644
--- a/src/CourseBundle/Entity/CToolIntro.php
+++ b/src/CourseBundle/Entity/CToolIntro.php
@@ -78,7 +78,7 @@ class CToolIntro extends AbstractResource implements ResourceInterface, Resource
 
     /**
      * @ORM\ManyToOne(targetEntity="Chamilo\CourseBundle\Entity\CTool")
-     * @ORM\JoinColumn(name="c_tool_id", referencedColumnName="iid", nullable=false)
+     * @ORM\JoinColumn(name="c_tool_id", referencedColumnName="iid", nullable=false, onDelete="CASCADE")
      */
     #[Assert\NotNull]
     #[Groups(['c_tool_intro:read', 'c_tool_intro:write'])]
diff --git a/tests/CourseBundle/Repository/CToolIntroRepositoryTest.php b/tests/CourseBundle/Repository/CToolIntroRepositoryTest.php
index 3cc57fd3df..d4bd1f70a8 100644
--- a/tests/CourseBundle/Repository/CToolIntroRepositoryTest.php
+++ b/tests/CourseBundle/Repository/CToolIntroRepositoryTest.php
@@ -7,6 +7,7 @@ declare(strict_types=1);
 namespace Chamilo\Tests\CourseBundle\Repository;
 
 use Chamilo\CoreBundle\Entity\ResourceLink;
+use Chamilo\CoreBundle\Repository\Node\CourseRepository;
 use Chamilo\CourseBundle\Entity\CTool;
 use Chamilo\CourseBundle\Entity\CToolIntro;
 use Chamilo\CourseBundle\Repository\CToolIntroRepository;
@@ -19,9 +20,9 @@ class CToolIntroRepositoryTest extends AbstractApiTest
 
     public function testCreate(): void
     {
-        self::bootKernel();
-
         $em = $this->getEntityManager();
+
+        $courseRepo = self::getContainer()->get(CourseRepository::class);
         $repo = self::getContainer()->get(CToolIntroRepository::class);
 
         $this->assertSame(0, $repo->count([]));
@@ -46,16 +47,49 @@ class CToolIntroRepositoryTest extends AbstractApiTest
         $this->assertNotEmpty($intro->getIntroText());
         $this->assertNotNull($intro->getIid());
         $this->assertNotEmpty($intro->getResourceName());
-
         $this->assertSame(1, $repo->count([]));
+
+        // Delete intro.
         $repo->delete($intro);
         $this->assertSame(0, $repo->count([]));
+        $this->assertSame(1, $courseRepo->count([]));
     }
 
-    public function testCreateInSession(): void
+    public function testCreateAndDeleteCourse(): void
     {
-        self::bootKernel();
+        $em = $this->getEntityManager();
+
+        $courseRepo = self::getContainer()->get(CourseRepository::class);
+        $repo = self::getContainer()->get(CToolIntroRepository::class);
+
+        $course = $this->createCourse('new');
+        $teacher = $this->createUser('teacher');
+
+        /** @var CTool $courseTool */
+        $courseTool = $course->getTools()->first();
+
+        $intro = (new CToolIntro())
+            ->setIntroText('test')
+            ->setCourseTool($courseTool)
+            ->setParent($course)
+            ->setCreator($teacher)
+            ->addCourseLink($course)
+        ;
+        $this->assertHasNoEntityViolations($intro);
+        $em->persist($intro);
+        $em->flush();
 
+        $this->assertSame(1, $courseRepo->count([]));
+        $this->assertSame(1, $repo->count([]));
+
+        // Delete course.
+        $courseRepo->delete($course);
+        $this->assertSame(0, $repo->count([]));
+        $this->assertSame(0, $courseRepo->count([]));
+    }
+
+    public function testCreateInSession(): void
+    {
         $em = $this->getEntityManager();
         $repo = self::getContainer()->get(CToolIntroRepository::class);
 
@@ -84,7 +118,6 @@ class CToolIntroRepositoryTest extends AbstractApiTest
         $this->assertSame(1, $repo->count([]));
 
         // Create intro in session.
-
         $intro2 = (new CToolIntro())
             ->setIntroText('test in session')
             ->setCourseTool($courseTool)
@@ -218,7 +251,6 @@ class CToolIntroRepositoryTest extends AbstractApiTest
     public function testUpdateIntroApi(): void
     {
         $course = $this->createCourse('new');
-
         $token = $this->getUserToken();
 
         $resourceNodeId = $course->getResourceNode()->getId();