diff --git a/docs/features/lesson-management.md b/docs/features/lesson-management.md
index dbf5f25..19edd71 100644
--- a/docs/features/lesson-management.md
+++ b/docs/features/lesson-management.md
@@ -198,6 +198,7 @@ Each lesson contains:
 - [x] Create Application/Services/LevelService.cs
 - [x] Create Application/Services/LessonService.cs
 - [x] Create Application/Services/ProgressService.cs
+- [x] Write unit tests for services (30 tests)
 - [ ] Create Application/Services/LevelService.cs
 - [ ] Create Application/Services/LessonService.cs
 - [ ] Create Application/Services/ProgressService.cs