diff --git a/tests/strategies/test_moving_average_crossover.py b/tests/strategies/test_moving_average_crossover.py
index 7b3aedc..cb67271 100644
--- a/tests/strategies/test_moving_average_crossover.py
+++ b/tests/strategies/test_moving_average_crossover.py
@@ -1,3 +1,6 @@
+"""
+Tests for the Moving Average Crossover strategy class.
+"""
 from datetime import date, timedelta
 
 import polars as pl