diff --git a/lib/Doctrine/ORM/Tools/SchemaValidator.php b/lib/Doctrine/ORM/Tools/SchemaValidator.php
index df4138d5abe..ff38d458877 100644
--- a/lib/Doctrine/ORM/Tools/SchemaValidator.php
+++ b/lib/Doctrine/ORM/Tools/SchemaValidator.php
@@ -22,6 +22,7 @@
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\Mapping\ClassMetadataInfo;
 use Doctrine\DBAL\Types\Type;
+use function count;
 
 /**
  * Performs strict validation of the mapping schema
@@ -96,6 +97,12 @@ public function validateClass(ClassMetadataInfo $class)
             }
         }
 
+        if ($class->isEmbeddedClass && count($class->associationMappings) > 0) {
+            $ce[] = "Embeddable '" . $class->name . "' does not support associations";
+
+            return $ce;
+        }
+
         foreach ($class->associationMappings as $fieldName => $assoc) {
             if (!class_exists($assoc['targetEntity']) || $cmf->isTransient($assoc['targetEntity'])) {
                 $ce[] = "The target entity '" . $assoc['targetEntity'] . "' specified on " . $class->name . '#' . $fieldName . ' is unknown or not an entity.';
diff --git a/tests/Doctrine/Tests/ORM/Tools/SchemaValidatorTest.php b/tests/Doctrine/Tests/ORM/Tools/SchemaValidatorTest.php
index 682ee896d1a..76618d540a4 100644
--- a/tests/Doctrine/Tests/ORM/Tools/SchemaValidatorTest.php
+++ b/tests/Doctrine/Tests/ORM/Tools/SchemaValidatorTest.php
@@ -1,26 +1,26 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Doctrine\Tests\ORM\Tools;
 
 use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\Mapping\Embeddable;
+use Doctrine\ORM\Mapping\OneToOne;
 use Doctrine\ORM\Tools\SchemaValidator;
 use Doctrine\Tests\OrmTestCase;
 
 class SchemaValidatorTest extends OrmTestCase
 {
-    /**
-     * @var EntityManager
-     */
+    /** @var EntityManager */
     private $em = null;
 
-    /**
-     * @var SchemaValidator
-     */
+    /** @var SchemaValidator */
     private $validator = null;
 
     public function setUp()
     {
-        $this->em = $this->_getTestEntityManager();
+        $this->em        = $this->_getTestEntityManager();
         $this->validator = new SchemaValidator($this->em);
     }
 
@@ -36,7 +36,7 @@ public function testCmsModelSet(string $path)
         self::assertEmpty($this->validator->validateMapping());
     }
 
-    public function modelSetProvider(): array
+    public function modelSetProvider() : array
     {
         return [
             'cms'        => [__DIR__ . '/../../Models/CMS'],
@@ -61,7 +61,7 @@ public function testInvalidManyToManyJoinColumnSchema()
         $this->assertEquals(
             [
                 "The inverse join columns of the many-to-many table 'Entity1Entity2' have to contain to ALL identifier columns of the target entity 'Doctrine\Tests\ORM\Tools\InvalidEntity2', however 'key4' are missing.",
-                "The join columns of the many-to-many table 'Entity1Entity2' have to contain to ALL identifier columns of the source entity 'Doctrine\Tests\ORM\Tools\InvalidEntity1', however 'key2' are missing."
+                "The join columns of the many-to-many table 'Entity1Entity2' have to contain to ALL identifier columns of the source entity 'Doctrine\Tests\ORM\Tools\InvalidEntity1', however 'key2' are missing.",
             ],
             $ce
         );
@@ -80,7 +80,7 @@ public function testInvalidToOneJoinColumnSchema()
         $this->assertEquals(
             [
                 "The referenced column name 'id' has to be a primary key column on the target entity class 'Doctrine\Tests\ORM\Tools\InvalidEntity1'.",
-                "The join columns of the association 'assoc' have to match to ALL identifier columns of the target entity 'Doctrine\Tests\ORM\Tools\InvalidEntity1', however 'key1, key2' are missing."
+                "The join columns of the association 'assoc' have to match to ALL identifier columns of the target entity 'Doctrine\Tests\ORM\Tools\InvalidEntity1', however 'key1, key2' are missing.",
             ],
             $ce
         );
@@ -105,13 +105,15 @@ public function testValidOneToOneAsIdentifierSchema()
     public function testInvalidTripleAssociationAsKeyMapping()
     {
         $classThree = $this->em->getClassMetadata(DDC1649Three::class);
-        $ce = $this->validator->validateClass($classThree);
+        $ce         = $this->validator->validateClass($classThree);
 
         $this->assertEquals(
             [
-            "Cannot map association 'Doctrine\Tests\ORM\Tools\DDC1649Three#two as identifier, because the target entity 'Doctrine\Tests\ORM\Tools\DDC1649Two' also maps an association as identifier.",
-            "The referenced column name 'id' has to be a primary key column on the target entity class 'Doctrine\Tests\ORM\Tools\DDC1649Two'."
-            ], $ce);
+                "Cannot map association 'Doctrine\Tests\ORM\Tools\DDC1649Three#two as identifier, because the target entity 'Doctrine\Tests\ORM\Tools\DDC1649Two' also maps an association as identifier.",
+                "The referenced column name 'id' has to be a primary key column on the target entity class 'Doctrine\Tests\ORM\Tools\DDC1649Two'.",
+            ],
+            $ce
+        );
     }
 
     /**
@@ -120,13 +122,13 @@ public function testInvalidTripleAssociationAsKeyMapping()
     public function testInvalidBiDirectionalRelationMappingMissingInversedByAttribute()
     {
         $class = $this->em->getClassMetadata(DDC3274One::class);
-        $ce = $this->validator->validateClass($class);
+        $ce    = $this->validator->validateClass($class);
 
         $this->assertEquals(
             [
-                "The field Doctrine\Tests\ORM\Tools\DDC3274One#two is on the inverse side of a bi-directional " .
-                "relationship, but the specified mappedBy association on the target-entity " .
-                "Doctrine\Tests\ORM\Tools\DDC3274Two#one does not contain the required 'inversedBy=\"two\"' attribute."
+                'The field Doctrine\Tests\ORM\Tools\DDC3274One#two is on the inverse side of a bi-directional ' .
+                'relationship, but the specified mappedBy association on the target-entity ' .
+                "Doctrine\Tests\ORM\Tools\DDC3274Two#one does not contain the required 'inversedBy=\"two\"' attribute.",
             ],
             $ce
         );
@@ -138,12 +140,12 @@ public function testInvalidBiDirectionalRelationMappingMissingInversedByAttribut
     public function testInvalidOrderByInvalidField()
     {
         $class = $this->em->getClassMetadata(DDC3322One::class);
-        $ce = $this->validator->validateClass($class);
+        $ce    = $this->validator->validateClass($class);
 
         $this->assertEquals(
             [
-                "The association Doctrine\Tests\ORM\Tools\DDC3322One#invalidAssoc is ordered by a foreign field " .
-                "invalidField that is not a field on the target entity Doctrine\Tests\ORM\Tools\DDC3322ValidEntity1."
+                'The association Doctrine\Tests\ORM\Tools\DDC3322One#invalidAssoc is ordered by a foreign field ' .
+                'invalidField that is not a field on the target entity Doctrine\Tests\ORM\Tools\DDC3322ValidEntity1.',
             ],
             $ce
         );
@@ -155,12 +157,12 @@ public function testInvalidOrderByInvalidField()
     public function testInvalidOrderByCollectionValuedAssociation()
     {
         $class = $this->em->getClassMetadata(DDC3322Two::class);
-        $ce = $this->validator->validateClass($class);
+        $ce    = $this->validator->validateClass($class);
 
         $this->assertEquals(
             [
-                "The association Doctrine\Tests\ORM\Tools\DDC3322Two#invalidAssoc is ordered by a field oneToMany " .
-                "on Doctrine\Tests\ORM\Tools\DDC3322ValidEntity1 that is a collection-valued association."
+                'The association Doctrine\Tests\ORM\Tools\DDC3322Two#invalidAssoc is ordered by a field oneToMany ' .
+                'on Doctrine\Tests\ORM\Tools\DDC3322ValidEntity1 that is a collection-valued association.',
             ],
             $ce
         );
@@ -172,16 +174,30 @@ public function testInvalidOrderByCollectionValuedAssociation()
     public function testInvalidOrderByAssociationInverseSide()
     {
         $class = $this->em->getClassMetadata(DDC3322Three::class);
-        $ce = $this->validator->validateClass($class);
+        $ce    = $this->validator->validateClass($class);
 
         $this->assertEquals(
             [
-                "The association Doctrine\Tests\ORM\Tools\DDC3322Three#invalidAssoc is ordered by a field oneToOneInverse " .
-                "on Doctrine\Tests\ORM\Tools\DDC3322ValidEntity1 that is the inverse side of an association."
+                'The association Doctrine\Tests\ORM\Tools\DDC3322Three#invalidAssoc is ordered by a field oneToOneInverse ' .
+                'on Doctrine\Tests\ORM\Tools\DDC3322ValidEntity1 that is the inverse side of an association.',
             ],
             $ce
         );
     }
+
+    /**
+     * @group 8052
+     */
+    public function testInvalidAssociationInsideEmbeddable()
+    {
+        $class = $this->em->getClassMetadata(EmbeddableWithAssociation::class);
+        $ce    = $this->validator->validateClass($class);
+
+        $this->assertEquals(
+            ["Embeddable 'Doctrine\Tests\ORM\Tools\EmbeddableWithAssociation' does not support associations"],
+            $ce
+        );
+    }
 }
 
 /**
@@ -189,13 +205,9 @@ public function testInvalidOrderByAssociationInverseSide()
  */
 class InvalidEntity1
 {
-    /**
-     * @Id @Column
-     */
+    /** @Id @Column */
     protected $key1;
-    /**
-     * @Id @Column
-     */
+    /** @Id @Column */
     protected $key2;
     /**
      * @ManyToMany (targetEntity="InvalidEntity2")
@@ -212,19 +224,13 @@ class InvalidEntity1
  */
 class InvalidEntity2
 {
-    /**
-     * @Id @Column
-     */
+    /** @Id @Column */
     protected $key3;
 
-    /**
-     * @Id @Column
-     */
+    /** @Id @Column */
     protected $key4;
 
-    /**
-     * @ManyToOne(targetEntity="InvalidEntity1")
-     */
+    /** @ManyToOne(targetEntity="InvalidEntity1") */
     protected $assoc;
 }
 
@@ -236,7 +242,6 @@ class DDC1587ValidEntity1
 {
     /**
      * @var int
-     *
      * @Id @GeneratedValue
      * @Column(name="pk", type="integer")
      */
@@ -244,14 +249,12 @@ class DDC1587ValidEntity1
 
     /**
      * @var string
-     *
      * @Column(name="name", type="string", length=32)
      */
     private $name;
 
     /**
      * @var Identifier
-     *
      * @OneToOne(targetEntity="DDC1587ValidEntity2", cascade={"all"}, mappedBy="agent")
      * @JoinColumn(name="pk", referencedColumnName="pk_agent")
      */
@@ -266,7 +269,6 @@ class DDC1587ValidEntity2
 {
     /**
      * @var DDC1587ValidEntity1
-     *
      * @Id
      * @OneToOne(targetEntity="DDC1587ValidEntity1", inversedBy="identifier")
      * @JoinColumn(name="pk_agent", referencedColumnName="pk", nullable=false)
@@ -275,7 +277,6 @@ class DDC1587ValidEntity2
 
     /**
      * @var string
-     *
      * @Column(name="num", type="string", length=16, nullable=true)
      */
     private $num;
@@ -286,9 +287,7 @@ class DDC1587ValidEntity2
  */
 class DDC1649One
 {
-    /**
-     * @Id @Column @GeneratedValue
-     */
+    /** @Id @Column @GeneratedValue */
     public $id;
 }
 
@@ -316,14 +315,10 @@ class DDC1649Three
  */
 class DDC3274One
 {
-    /**
-     * @Id @Column @GeneratedValue
-     */
+    /** @Id @Column @GeneratedValue */
     private $id;
 
-    /**
-     * @OneToMany(targetEntity="DDC3274Two", mappedBy="one")
-     */
+    /** @OneToMany(targetEntity="DDC3274Two", mappedBy="one") */
     private $two;
 }
 
@@ -344,59 +339,37 @@ class DDC3274Two
  */
 class DDC3322ValidEntity1
 {
-    /**
-     * @Id @Column @GeneratedValue
-     */
+    /** @Id @Column @GeneratedValue */
     private $id;
 
-    /**
-     * @ManyToOne(targetEntity="DDC3322One", inversedBy="validAssoc")
-     */
+    /** @ManyToOne(targetEntity="DDC3322One", inversedBy="validAssoc") */
     private $oneValid;
 
-    /**
-     * @ManyToOne(targetEntity="DDC3322One", inversedBy="invalidAssoc")
-     */
+    /** @ManyToOne(targetEntity="DDC3322One", inversedBy="invalidAssoc") */
     private $oneInvalid;
 
-    /**
-     * @ManyToOne(targetEntity="DDC3322Two", inversedBy="validAssoc")
-     */
+    /** @ManyToOne(targetEntity="DDC3322Two", inversedBy="validAssoc") */
     private $twoValid;
 
-    /**
-     * @ManyToOne(targetEntity="DDC3322Two", inversedBy="invalidAssoc")
-     */
+    /** @ManyToOne(targetEntity="DDC3322Two", inversedBy="invalidAssoc") */
     private $twoInvalid;
 
-    /**
-     * @ManyToOne(targetEntity="DDC3322Three", inversedBy="validAssoc")
-     */
+    /** @ManyToOne(targetEntity="DDC3322Three", inversedBy="validAssoc") */
     private $threeValid;
 
-    /**
-     * @ManyToOne(targetEntity="DDC3322Three", inversedBy="invalidAssoc")
-     */
+    /** @ManyToOne(targetEntity="DDC3322Three", inversedBy="invalidAssoc") */
     private $threeInvalid;
 
-    /**
-     * @OneToMany(targetEntity="DDC3322ValidEntity2", mappedBy="manyToOne")
-     */
+    /** @OneToMany(targetEntity="DDC3322ValidEntity2", mappedBy="manyToOne") */
     private $oneToMany;
 
-    /**
-     * @ManyToOne(targetEntity="DDC3322ValidEntity2", inversedBy="oneToMany")
-     */
+    /** @ManyToOne(targetEntity="DDC3322ValidEntity2", inversedBy="oneToMany") */
     private $manyToOne;
 
-    /**
-     * @OneToOne(targetEntity="DDC3322ValidEntity2", mappedBy="oneToOneOwning")
-     */
+    /** @OneToOne(targetEntity="DDC3322ValidEntity2", mappedBy="oneToOneOwning") */
     private $oneToOneInverse;
 
-    /**
-     * @OneToOne(targetEntity="DDC3322ValidEntity2", inversedBy="oneToOneInverse")
-     */
+    /** @OneToOne(targetEntity="DDC3322ValidEntity2", inversedBy="oneToOneInverse") */
     private $oneToOneOwning;
 }
 
@@ -405,29 +378,19 @@ class DDC3322ValidEntity1
  */
 class DDC3322ValidEntity2
 {
-    /**
-     * @Id @Column @GeneratedValue
-     */
+    /** @Id @Column @GeneratedValue */
     private $id;
 
-    /**
-     * @ManyToOne(targetEntity="DDC3322ValidEntity1", inversedBy="oneToMany")
-     */
+    /** @ManyToOne(targetEntity="DDC3322ValidEntity1", inversedBy="oneToMany") */
     private $manyToOne;
 
-    /**
-     * @OneToMany(targetEntity="DDC3322ValidEntity1", mappedBy="manyToOne")
-     */
+    /** @OneToMany(targetEntity="DDC3322ValidEntity1", mappedBy="manyToOne") */
     private $oneToMany;
 
-    /**
-     * @OneToOne(targetEntity="DDC3322ValidEntity1", inversedBy="oneToOneInverse")
-     */
+    /** @OneToOne(targetEntity="DDC3322ValidEntity1", inversedBy="oneToOneInverse") */
     private $oneToOneOwning;
 
-    /**
-     * @OneToOne(targetEntity="DDC3322ValidEntity1", mappedBy="oneToOneOwning")
-     */
+    /** @OneToOne(targetEntity="DDC3322ValidEntity1", mappedBy="oneToOneOwning") */
     private $oneToOneInverse;
 }
 
@@ -436,9 +399,7 @@ class DDC3322ValidEntity2
  */
 class DDC3322One
 {
-    /**
-     * @Id @Column @GeneratedValue
-     */
+    /** @Id @Column @GeneratedValue */
     private $id;
 
     /**
@@ -459,9 +420,7 @@ class DDC3322One
  */
 class DDC3322Two
 {
-    /**
-     * @Id @Column @GeneratedValue
-     */
+    /** @Id @Column @GeneratedValue */
     private $id;
 
     /**
@@ -482,9 +441,7 @@ class DDC3322Two
  */
 class DDC3322Three
 {
-    /**
-     * @Id @Column @GeneratedValue
-     */
+    /** @Id @Column @GeneratedValue */
     private $id;
 
     /**
@@ -499,3 +456,12 @@ class DDC3322Three
      */
     private $invalidAssoc;
 }
+
+/**
+ * @Embeddable
+ */
+class EmbeddableWithAssociation
+{
+    /** @OneToOne(targetEntity="Doctrine\Tests\Models\ECommerce\ECommerceCart") */
+    private $cart;
+}