.../Kernel/EntityEmbedFilterTranslationTest.php    | 64 +++++++---------------
 1 file changed, 20 insertions(+), 44 deletions(-)

diff --git a/tests/src/Kernel/EntityEmbedFilterTranslationTest.php b/tests/src/Kernel/EntityEmbedFilterTranslationTest.php
index 7d55fb2..0863a7a 100644
--- a/tests/src/Kernel/EntityEmbedFilterTranslationTest.php
+++ b/tests/src/Kernel/EntityEmbedFilterTranslationTest.php
@@ -30,38 +30,10 @@ class EntityEmbedFilterTranslationTest extends EntityEmbedFilterTestBase {
     $this->node = $this->container->get('entity.manager')
       ->getStorage('node')
       ->load($this->node->id());
-  }
 
-  /**
-   * Test translation title.
-   */
-  public function testFilterTranslationTitle() {
-    $content = $this->createEmbedCode([
-      'data-entity-type' => 'node',
-      'data-entity-uuid' => 'e7a3e1fe-b69b-417e-8ee4-c80cb7640e63',
-      'data-view-mode' => 'teaser',
-      'data-entity-embed-display' => 'entity_reference:entity_reference_label',
-      'data-entity-embed-settings' => '{"link":"0"}',
-    ]);
-
-    // Assert that title of embedded entity is unaffected when embedded entity
-    // lacks a matching translation.
-    $expected_title = $this->node->getTitle();
-    $this->applyFilter($content, 'en');
-    $this->assertRaw($expected_title);
-    $this->applyFilter($content, 'pt-br');
-    $this->assertRaw($expected_title);
-
-    // Translate the embedded entity to the same language as the context (i.e.
-    // the language of the host entity).
     $this->node->addTranslation('pt-br')
       ->setTitle('Embed em portugues')
       ->save();
-
-    // Assert that title is translated when embedded entity has a matching
-    // translation.
-    $this->applyFilter($content, 'pt-br');
-    $this->assertRaw($this->node->getTranslation('pt-br')->getTitle());
   }
 
   /**
@@ -69,22 +41,14 @@ class EntityEmbedFilterTranslationTest extends EntityEmbedFilterTestBase {
    *
    * @dataProvider providerTestFilterTranslations
    */
-  public function testFilterTranslations($text_langcode, $data_langcode, $expected_title_langcode) {
-    $text = $this->createEmbedCode( [
+  public function testFilterTranslations($text_langcode, array $additional_attributes, $expected_title_langcode) {
+    $text = $this->createEmbedCode([
       'data-entity-type' => 'node',
       'data-entity-uuid' => 'e7a3e1fe-b69b-417e-8ee4-c80cb7640e63',
       'data-view-mode' => 'teaser',
       'data-entity-embed-display' => 'entity_reference:entity_reference_label',
       'data-entity-embed-settings' => '{"link":"0"}',
-      'data-langcode' => $data_langcode,
-    ]);
-
-    // Translate the embedded entity to the same language as the context (i.e.
-    // the language of the host entity).
-    $this->node->addTranslation('pt-br')
-      ->setTitle('Embed em portugues')
-      ->save();
-
+    ] + $additional_attributes);
     $this->applyFilter($text, $text_langcode);
     $this->assertRaw($this->node->getTranslation($expected_title_langcode)->getTitle());
   }
@@ -93,14 +57,26 @@ class EntityEmbedFilterTranslationTest extends EntityEmbedFilterTestBase {
    * Data provider for testFilterTranslations.
    */
   public function providerTestFilterTranslations() {
+    $embedded_entity_translation_languages = ['en', 'pt-br'];
+
     foreach (['en', 'pt-br', 'nl'] as $text_langcode) {
+      // When no `data-langcode` attribute is specified, the text language
+      // (which is set to the host entity's language) is respected. If that
+      // translation does not exist, it falls back to the default translation of
+      // the embedded entity.
+      yield ["text_langcode=$text_langcode (✅) ⇒ $text_langcode" =>
+        $text_langcode,
+        [],
+        in_array($text_langcode, $embedded_entity_translation_languages) ? $text_langcode : 'en',
+      ];
+
       // When the embedded entity has a translation for the language code in the
       // `data-langcode` attribute, that translation is used, regardless of the
       // language of the text (which is set to the language of the host entity).
-      foreach (['en', 'pt-br'] as $data_langcode) {
+      foreach ($embedded_entity_translation_languages as $data_langcode) {
         yield "text_langcode=$text_langcode (✅); data-langcode=$data_langcode (✅) ⇒ $data_langcode" => [
           $text_langcode,
-          $data_langcode,
+          ['data-langcode' => $data_langcode],
           $data_langcode,
         ];
       }
@@ -110,15 +86,15 @@ class EntityEmbedFilterTranslationTest extends EntityEmbedFilterTestBase {
       // of the embedded entity.
       yield "text_langcode=$text_langcode (✅); data-langcode=nl (🚫) ⇒ en" => [
         $text_langcode,
-        'nl',
+        ['data-langcode' => 'nl'],
         'en',
       ];
 
       // When specifying a invalid language code, it falls back to the default
       // translation of the embedded entity.
       yield "text_langcode=$text_langcode (✅); data-langcode=non-existing-and-even-invalid-langcode (🚫) ⇒ en" => [
-        'text_langcode' => $text_langcode,
-        'data-langcode' => 'non-existing-and-even-invalid-langcode',
+        $text_langcode,
+        ['data-langcode' => 'non-existing-and-even-invalid-langcode'],
         'en',
       ];
     }