diff --git a/tests/test_schema_generator.py b/tests/test_schema_generator.py
index 5cdc834..b40bf5f 100644
--- a/tests/test_schema_generator.py
+++ b/tests/test_schema_generator.py
@@ -1,3 +1,4 @@
+"""Tests for OpenAPI schema generation."""
 import pytest
 import json
 import yaml