diff --git a/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonAnonTest.php b/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonAnonTest.php
new file mode 100644
index 0000000..6e1938f
--- /dev/null
+++ b/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonAnonTest.php
@@ -0,0 +1,137 @@
+<?php
+
+namespace Drupal\Tests\hal\Functional\EntityResource\BlockContent;
+
+use Drupal\Core\Cache\Cache;
+use Drupal\Tests\hal\Functional\EntityResource\HalEntityNormalizationTrait;
+use Drupal\Tests\rest\Functional\AnonResourceTestTrait;
+use Drupal\Tests\rest\Functional\EntityResource\BlockContent\BlockContentResourceTestBase;
+
+/**
+ * @group hal
+ */
+class BlockContentHalJsonAnonTest extends BlockContentResourceTestBase {
+
+  use HalEntityNormalizationTrait;
+  use AnonResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['hal'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'hal_json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/hal+json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedNormalizedEntity() {
+    $default_normalization = parent::getExpectedNormalizedEntity();
+
+    $normalization = $this->applyHalFieldNormalization($default_normalization);
+
+    return $normalization + [
+      '_links' => [
+        'self' => [
+          'href' => $this->baseUrl . '/block/1?_format=hal_json',
+        ],
+        'type' => [
+          'href' => $this->baseUrl . '/rest/type/block_content/basic',
+        ],
+      ],
+      'body' => [
+        [
+          'value' => 'The name "llama" was adopted by European settlers from native Peruvians.',
+          'format' => 'plain_text',
+          'summary' => NULL,
+          'lang' => 'en',
+        ],
+      ],
+      'changed' => [
+        [
+          'value' => $this->entity->getChangedTime(),
+          'lang' => 'en',
+        ],
+      ],
+      'default_langcode' => [
+        [
+          'value' => TRUE,
+          'lang' => 'en',
+        ],
+      ],
+      'id' => [
+        [
+          'value' => $this->entity->id(),
+        ],
+      ],
+      'info' => [
+        [
+          'value' => 'Llama',
+          'lang' => 'en',
+        ],
+      ],
+      'langcode' => [
+        [
+          'value' => 'en',
+          'lang' => 'en',
+        ],
+      ],
+      'revision_created' => [
+        [
+          'value' => (int) $this->entity->getRevisionCreationTime(),
+        ],
+      ],
+      'revision_id' => [
+        [
+          'value' => $this->entity->getRevisionId(),
+        ],
+      ],
+      'revision_translation_affected' => [
+        [
+          'value' => TRUE,
+          'lang' => 'en',
+        ],
+      ],
+      'type' => [
+        [
+          'target_id' => 'basic',
+        ],
+      ],
+      'uuid' => [
+        [
+          'value' => $this->entity->uuid(),
+        ],
+      ],
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getNormalizedPostEntity() {
+    return parent::getNormalizedPostEntity() + [
+      '_links' => [
+        'type' => [
+          'href' => $this->baseUrl . '/rest/type/block_content/basic',
+        ],
+      ],
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedCacheContexts() {
+    // The 'url.site' cache context is added for '_links' in the response.
+    return Cache::mergeTags(parent::getExpectedCacheContexts(), ['url.site']);
+  }
+
+}
diff --git a/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonBasicAuthTest.php b/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonBasicAuthTest.php
new file mode 100644
index 0000000..94d3ff4
--- /dev/null
+++ b/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonBasicAuthTest.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Drupal\Tests\hal\Functional\EntityResource\BlockContent;
+
+use Drupal\Tests\rest\Functional\BasicAuthResourceTestTrait;
+
+/**
+ * @group hal
+ */
+class BlockContentHalJsonBasicAuthTest extends BlockContentHalJsonAnonTest {
+
+  use BasicAuthResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['basic_auth'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'basic_auth';
+
+}
diff --git a/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonCookieTest.php b/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonCookieTest.php
new file mode 100644
index 0000000..9cc0f25
--- /dev/null
+++ b/core/modules/hal/tests/src/Functional/EntityResource/BlockContent/BlockContentHalJsonCookieTest.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace Drupal\Tests\hal\Functional\EntityResource\BlockContent;
+
+use Drupal\Tests\rest\Functional\CookieResourceTestTrait;
+
+/**
+ * @group hal
+ */
+class BlockContentHalJsonCookieTest extends BlockContentHalJsonAnonTest {
+
+  use CookieResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'cookie';
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonAnonTest.php b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonAnonTest.php
new file mode 100644
index 0000000..16688cb
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonAnonTest.php
@@ -0,0 +1,24 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\BlockContent;
+
+use Drupal\Tests\rest\Functional\AnonResourceTestTrait;
+
+/**
+ * @group rest
+ */
+class BlockContentJsonAnonTest extends BlockContentResourceTestBase {
+
+  use AnonResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/json';
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonBasicAuthTest.php b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonBasicAuthTest.php
new file mode 100644
index 0000000..c804632
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonBasicAuthTest.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\BlockContent;
+
+use Drupal\Tests\rest\Functional\BasicAuthResourceTestTrait;
+
+/**
+ * @group rest
+ */
+class BlockContentJsonBasicAuthTest extends BlockContentResourceTestBase {
+
+  use BasicAuthResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['basic_auth'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'basic_auth';
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonCookieTest.php b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonCookieTest.php
new file mode 100644
index 0000000..75bb3c2
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentJsonCookieTest.php
@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\BlockContent;
+
+use Drupal\Tests\rest\Functional\CookieResourceTestTrait;
+
+/**
+ * @group rest
+ */
+class BlockContentJsonCookieTest extends BlockContentResourceTestBase {
+
+  use CookieResourceTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $format = 'json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $mimeType = 'application/json';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $auth = 'cookie';
+
+}
diff --git a/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentResourceTestBase.php
new file mode 100644
index 0000000..4d30111
--- /dev/null
+++ b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentResourceTestBase.php
@@ -0,0 +1,150 @@
+<?php
+
+namespace Drupal\Tests\rest\Functional\EntityResource\BlockContent;
+
+use Drupal\block_content\Entity\BlockContent;
+use Drupal\block_content\Entity\BlockContentType;
+use Drupal\Tests\rest\Functional\EntityResource\EntityResourceTestBase;
+
+/**
+ * ResourceTestBase for BlockContent entity.
+ */
+abstract class BlockContentResourceTestBase extends EntityResourceTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['block_content'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $entityTypeId = 'block_content';
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $patchProtectedFieldNames = [
+    'id',
+    'revision_id',
+    'changed',
+  ];
+
+  /**
+   * @var \Drupal\block_content\BlockContentInterface
+   */
+  protected $entity;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUpAuthorization($method) {
+    $this->grantPermissionsToTestedRole(['administer blocks']);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function createEntity() {
+    $block_content_type = BlockContentType::create([
+      'id' => 'basic',
+      'label' => 'basic',
+      'revision' => FALSE,
+    ]);
+    $block_content_type->save();
+    block_content_add_body_field($block_content_type->id());
+
+    // Create a "Llama" custom block.
+    $block_content = BlockContent::create([
+      'info' => 'Llama',
+      'type' => 'basic',
+      'body' => [
+        'value' => 'The name "llama" was adopted by European settlers from native Peruvians.',
+        'format' => 'plain_text',
+      ],
+    ]);
+
+    $block_content->setChangedTime(123456789)
+      ->setRevisionCreationTime(123456789)
+      ->save();
+
+    return $block_content;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedNormalizedEntity() {
+    return [
+      'id' => [
+        [
+          'value' => 1,
+        ],
+      ],
+      'uuid' => [
+        [
+          'value' => $this->entity->uuid(),
+        ],
+      ],
+      'langcode' => [
+        [
+          'value' => 'en',
+        ],
+      ],
+      'type' => [
+        [
+          'target_id' => 'basic',
+          'target_type' => 'block_content_type',
+          'target_uuid' => BlockContentType::load('basic')->uuid(),
+        ],
+      ],
+      'info' => [
+        [
+          'value' => 'Llama',
+        ],
+      ],
+      'revision_log' => [],
+      'changed' => [
+        [
+          'value' => $this->entity->getChangedTime(),
+        ],
+      ],
+      'revision_id' => [
+        [
+          'value' => 1,
+        ],
+      ],
+      'revision_created' => [
+        [
+          'value' => (int) $this->entity->getRevisionCreationTime(),
+        ],
+      ],
+      'revision_user' => [],
+      'revision_translation_affected' => [
+        [
+          'value' => TRUE,
+        ],
+      ],
+      'default_langcode' => [
+        [
+          'value' => TRUE,
+        ],
+      ],
+      'body' => [
+        [
+          'value' => 'The name "llama" was adopted by European settlers from native Peruvians.',
+          'format' => 'plain_text',
+          'summary' => NULL,
+        ],
+      ],
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getNormalizedPostEntity() {
+    return [];
+  }
+
+}