core/modules/ckeditor5/ckeditor5.ckeditor5.yml     |  4 +++-
 .../src/Plugin/CKEditor5PluginDefinition.php       | 28 +++++++++++-----------
 .../src/Plugin/CKEditor5PluginManager.php          |  8 +++----
 3 files changed, 21 insertions(+), 19 deletions(-)

diff --git a/core/modules/ckeditor5/ckeditor5.ckeditor5.yml b/core/modules/ckeditor5/ckeditor5.ckeditor5.yml
index a8195efcd0..05d0031750 100644
--- a/core/modules/ckeditor5/ckeditor5.ckeditor5.yml
+++ b/core/modules/ckeditor5/ckeditor5.ckeditor5.yml
@@ -117,7 +117,9 @@ ckeditor5_sourceEditing:
     class: \Drupal\ckeditor5\Plugin\CKEditor5Plugin\SourceEditing
     # This is the only CKEditor 5 plugin allowed to generate a superset of elements.
     # @see \Drupal\ckeditor5\Plugin\CKEditor5Plugin\SourceEditing::getElementsSubset()
-    elements: ['<*>']
+    # @see \Drupal\ckeditor5\Plugin\CKEditor5PluginDefinition::validateDrupalAspects()
+    # @see \Drupal\ckeditor5\Plugin\CKEditor5PluginManager::getProvidedElements()
+    elements: []
     library: core/ckeditor5.sourceEditing
     admin_library: ckeditor5/admin.sourceEditing
     toolbar_items:
diff --git a/core/modules/ckeditor5/src/Plugin/CKEditor5PluginDefinition.php b/core/modules/ckeditor5/src/Plugin/CKEditor5PluginDefinition.php
index 0222d76f2f..8e0aab0e68 100644
--- a/core/modules/ckeditor5/src/Plugin/CKEditor5PluginDefinition.php
+++ b/core/modules/ckeditor5/src/Plugin/CKEditor5PluginDefinition.php
@@ -122,25 +122,25 @@ private function validateDrupalAspects(string $id, array $definition): void {
     if (!isset($definition['drupal']['elements'])) {
       throw new InvalidPluginDefinitionException($id, sprintf('The "%s" CKEditor 5 plugin definition must contain a "drupal.elements" key.', $id));
     }
+    // ckeditor5_sourceEditing is the edge case here: it is the only plugin that
+    // is allowed to return a superset. It's a special case because it is
+    // through configuring this particular plugin that additional HTML tags can
+    // be allowed.
+    // Even though its plugin definition says an empty list of tags is
+    // supported, this is a little lie to convey that this plugin is capable of
+    // supporting any HTML tag … but which ones are actually supported depends
+    // on the configuration.
+    // This also means that without any configuration, it does not support any
+    // HTML tags.
+    // @see \Drupal\ckeditor5\Plugin\CKEditor5PluginManager::getProvidedElements()
+    elseif ($definition['id'] === 'ckeditor5_sourceEditing') {
+      assert($definition['drupal']['elements'] === []);
+    }
     elseif ($definition['drupal']['elements'] !== FALSE && !(is_array($definition['drupal']['elements']) && !empty($definition['drupal']['elements']) && Inspector::assertAllStrings($definition['drupal']['elements']))) {
       throw new InvalidPluginDefinitionException($id, sprintf('The "%s" CKEditor 5 plugin definition has a "drupal.elements" value that is neither a list of HTML tags/attributes nor false.', $id));
     }
     elseif (is_array($definition['drupal']['elements'])) {
       foreach ($definition['drupal']['elements'] as $index => $element) {
-        // ckeditor5_sourceEditing is the edge case here: it is the only plugin
-        // that is allowed to return a superset. It's a special case because it
-        // is through configuring this particular plugin that additional HTML
-        // tags can be allowed.
-        // Even though its plugin definition says '<*>' is supported, this is a
-        // little lie to convey that this plugin is capable of supporting any
-        // HTML tag … but which ones are actually supported depends on the
-        // configuration.
-        // This also means that without any configuration, it does not support
-        // any HTML tags.
-        // @see \Drupal\ckeditor5\Plugin\CKEditor5PluginManager::getProvidedElements()
-        if ($definition['id'] === 'ckeditor5_sourceEditing') {
-          continue;
-        }
         $parsed = HTMLRestrictions::fromString($element);
         if ($parsed->isEmpty()) {
           throw new InvalidPluginDefinitionException($id, sprintf('The "%s" CKEditor 5 plugin definition has a value at "drupal.elements.%d" that is not an HTML tag with optional attributes: "%s". Expected structure: "<tag allowedAttribute="allowedValue1 allowedValue2">".', $id, $index, $element));
diff --git a/core/modules/ckeditor5/src/Plugin/CKEditor5PluginManager.php b/core/modules/ckeditor5/src/Plugin/CKEditor5PluginManager.php
index 8f628a9035..19733426bd 100644
--- a/core/modules/ckeditor5/src/Plugin/CKEditor5PluginManager.php
+++ b/core/modules/ckeditor5/src/Plugin/CKEditor5PluginManager.php
@@ -318,10 +318,10 @@ public function getProvidedElements(array $plugin_ids = [], EditorInterface $edi
         // that is allowed to return a superset. It's a special case because it
         // is through configuring this particular plugin that additional HTML
         // tags can be allowed.
-        // Even though its plugin definition says '<*>' is supported, this is a
-        // little lie to convey that this plugin is capable of supporting any
-        // HTML tag … but which ones are actually supported depends on the
-        // configuration.
+        // Even though its plugin definition says an empty list of tags is
+        // supported, this is a little lie to convey that this plugin is capable
+        // of supporting any HTML tag … but which ones are actually supported
+        // depends on the configuration.
         // This also means that without any configuration, it does not support
         // any HTML tags.
         if ($id === 'ckeditor5_sourceEditing') {