diff --git a/tests/Database/Base.php b/tests/Database/Base.php
index 522eac3bc1..33ec8962a4 100644
--- a/tests/Database/Base.php
+++ b/tests/Database/Base.php
@@ -1537,11 +1537,24 @@ public function testExceptionIndexLimitInQueue()
      */
     public function testExceptionDuplicate(Document $document)
     {
+        $document->setAttribute('$id', 'duplicated');
+        static::getDatabase()->createDocument($document->getCollection(), $document);
+
         $this->expectException(DuplicateException::class);
+        static::getDatabase()->createDocument($document->getCollection(), $document);
+    }
 
-        $document->setAttribute('$id', 'duplicated');
-        
+    /**
+     * @depends testGetDocument
+     */
+    public function testExceptionCaseInsensitiveDuplicate(Document $document)
+    {
+        $document->setAttribute('$id', 'caseSensitive');
         static::getDatabase()->createDocument($document->getCollection(), $document);
+
+        $document->setAttribute('$id', 'CaseSensitive');
+
+        $this->expectException(DuplicateException::class);
         static::getDatabase()->createDocument($document->getCollection(), $document);
         
         return $document;