diff --git a/core/modules/content_moderation/tests/src/Kernel/ContentModerationSyncingTest.php b/core/modules/content_moderation/tests/src/Kernel/ContentModerationSyncingTest.php
index 1a61d7cd51..1f53c38fe6 100644
--- a/core/modules/content_moderation/tests/src/Kernel/ContentModerationSyncingTest.php
+++ b/core/modules/content_moderation/tests/src/Kernel/ContentModerationSyncingTest.php
@@ -110,4 +110,39 @@ public function testMultipleRevisionStateChangedDuringSync() {
     $this->assertTrue($entity->isDefaultRevision());
   }
 
+  /**
+   * Test modifying a previous revision during a sync.
+   */
+  public function testUpdatingPreviousRevisionDuringSync() {
+    $storage = $this->container->get('entity_type.manager')->getStorage('entity_test_mulrevpub');
+
+    $entity = EntityTestMulRevPub::create([
+      'moderation_state' => 'published',
+      'name' => 'foo',
+    ]);
+    $entity->save();
+    $original_revision_id = $entity->getRevisionId();
+
+    $entity->name = 'bar';
+    $entity->save();
+
+    // Sync a change to the 'name' on the original revision ID.
+    $original_revision = $storage->loadRevision($original_revision_id);
+    $original_revision->setSyncing(TRUE);
+    $original_revision->name = 'baz';
+    $original_revision->save();
+
+    // The names of each revision should reflect two revisions, the original one
+    // having been updated during a sync.
+    $all_revision_names = array_map(function($revision_id) use ($storage) {
+      return $storage->loadRevision($revision_id)->name->value;
+    }, array_keys($storage->getQuery()
+        ->allRevisions()
+        ->condition('id', $entity->id())
+        ->sort('revision_id', 'ASC')
+        ->execute())
+    );
+    $this->assertEquals(['baz', 'bar'], $all_revision_names);
+  }
+
 }