diff --git a/devel/cover b/devel/cover
index b326e9c..972ee67 100755
--- a/devel/cover
+++ b/devel/cover
@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Coverage and unit tests!
+# Build a coverage-enabled darkhttpd, run unit tests and calculate coverage.
 #
 cd $(dirname $0)
 DIR=tmp.httpd.tests
diff --git a/devel/test.py b/devel/test.py
index 9dbda91..031dc71 100755
--- a/devel/test.py
+++ b/devel/test.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+# This is run by the "cover" script.
 import unittest
 import socket
 import signal
diff --git a/devel/test_forward.py b/devel/test_forward.py
index 103feef..4f5ae38 100755
--- a/devel/test_forward.py
+++ b/devel/test_forward.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+# This is run by the "cover" script.
 import unittest
 from test import TestHelper, Conn, parse
 
diff --git a/devel/test_server_id.py b/devel/test_server_id.py
index f35f76b..07b8f66 100755
--- a/devel/test_server_id.py
+++ b/devel/test_server_id.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+# This is run by the "cover" script.
 import unittest
 from test import TestHelper, Conn, parse