diff --git a/markdown-test/17-06-2025.md b/markdown-test/17-06-2025.md
index ec6b779..bae2851 100644
--- a/markdown-test/17-06-2025.md
+++ b/markdown-test/17-06-2025.md
@@ -52,6 +52,11 @@ _Курсив_
 > Пример кода:
 > `System.out.pringln("Hello, world!");`
 
+<details>
+  <summary>Test summary</summary>
+  Test text wow
+</details>
+
 # Список
 
 ---