diff --git a/test_helpers.py b/tests/test_helpers.py
similarity index 98%
rename from test_helpers.py
rename to tests/test_helpers.py
index 1c82be45..ee798921 100644
--- a/test_helpers.py
+++ b/tests/test_helpers.py
@@ -1,3 +1,7 @@
+"""
+Tests for various datasette helper functions.
+"""
+
 from datasette import app
 import pytest
 import json