diff --git a/docs/test.rst b/docs/test.rst
index c6dac7d..e868d82 100644
--- a/docs/test.rst
+++ b/docs/test.rst
@@ -9,3 +9,5 @@ The `test` module offers extra functions for unit tests.
 
 .. autoclass:: django_marina.test.test_cases.ExtendedTestCase
    :members:
+
+.. autoclass:: django_marina.test.runners.TempMediaDiscoverRunner
diff --git a/src/django_marina/test/runners.py b/src/django_marina/test/runners.py
index e0315a2..23171d9 100644
--- a/src/django_marina/test/runners.py
+++ b/src/django_marina/test/runners.py
@@ -1,3 +1,4 @@
+import shutil
 import tempfile
 
 from django.conf import settings
@@ -31,4 +32,4 @@ def teardown_test_environment(self):
 
 
 class TempMediaDiscoverRunner(TempMediaMixin, DiscoverRunner):
-    """Use temporary files for media storage in tests."""
+    """Default Django DiscoverRunner, modified to write media files to a temp folder."""