diff --git a/core/modules/config_translation/src/FormElement/PluralVariants.php b/core/modules/config_translation/src/FormElement/PluralVariants.php
index 0735a59..e13e628 100644
--- a/core/modules/config_translation/src/FormElement/PluralVariants.php
+++ b/core/modules/config_translation/src/FormElement/PluralVariants.php
@@ -38,8 +38,9 @@ protected function getSourceElement(LanguageInterface $source_language, $source_
     for ($i = 0; $i < $plurals; $i++) {
       $element[$i] = array(
         '#type' => 'inline_template',
-        '#template' => '<div class="form-item"><label>{{ label }}</label><span lang="{{ langcode }}">{{ value }}</span></div>',
+        '#template' => '<div id="{{ id }}" class="form-item"><label>{{ label }}</label><span lang="{{ langcode }}">{{ value }}</span></div>',
         '#context' => array(
+          'id' => 'edit-source-config-format-plural-string-' . $i,
           // @todo Should use better labels https://www.drupal.org/node/2499639
           'label' => $i == 0 ? $this->t('Singular form') : $this->formatPlural($i, 'First plural form', '@count. plural form'),
           'langcode' => $source_language->getId(),
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
index dd3e033..811a5f0 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
@@ -659,16 +659,16 @@ public function testPluralConfigStringsSourceElements() {
       $config->save();
 
       // Go to the translation page of the 'files' view.
-      $translation_url = 'admin/structure/views/view/files/translate/en/add';
+      $translation_url = 'admin/structure/views/view/files/translate/' . $langcode . '/add';
       $this->drupalGet($translation_url);
 
       // Check if the expected number of source elements are present.
       foreach ($data['expected'] as $index => $expected) {
         if ($expected) {
-          $this->assertRaw('edit-source-config-names-viewsviewfiles-display-default-display-options-fields-count-format-plural-string-' . $index);
+          $this->assertRaw('edit-source-config-format-plural-string-' . $index);
         }
         else {
-          $this->assertNoRaw('edit-source-config-names-viewsviewfiles-display-default-display-options-fields-count-format-plural-string-' . $index);
+          $this->assertNoRaw('edit-source-config-format-plural-string-' . $index);
         }
       }
     }