.../BlockContent/BlockContentResourceTestBase.php       | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentResourceTestBase.php b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentResourceTestBase.php
index 8b67cc6..6521c6e 100644
--- a/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentResourceTestBase.php
+++ b/core/modules/rest/tests/src/Functional/EntityResource/BlockContent/BlockContentResourceTestBase.php
@@ -4,6 +4,7 @@
 
 use Drupal\block_content\Entity\BlockContent;
 use Drupal\block_content\Entity\BlockContentType;
+use Drupal\Core\Cache\Cache;
 use Drupal\Tests\rest\Functional\BcTimestampNormalizerUnixTestTrait;
 use Drupal\Tests\rest\Functional\EntityResource\EntityResourceTestBase;
 
@@ -131,6 +132,7 @@ protected function getExpectedNormalizedEntity() {
           'value' => 'The name "llama" was adopted by European settlers from native Peruvians.',
           'format' => 'plain_text',
           'summary' => NULL,
+          'process_result' => "<p>The name &quot;llama&quot; was adopted by European settlers from native Peruvians.</p>\n",
         ],
       ],
       'status' => [
@@ -171,4 +173,19 @@ protected function getExpectedUnauthorizedAccessMessage($method) {
     return parent::getExpectedUnauthorizedAccessMessage($method);
   }
 
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedCacheTags() {
+    return Cache::mergeTags(parent::getExpectedCacheTags(), ['config:filter.format.plain_text']);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getExpectedCacheContexts() {
+    return Cache::mergeContexts(['url.site'], $this->container->getParameter('renderer.config')['required_cache_contexts']);
+  }
+
 }