diff --git a/README.md b/README.md
index a1817c8..87a1e50 100644
--- a/README.md
+++ b/README.md
@@ -135,7 +135,7 @@ Some extension has special requirements:
 - If you want to change the list of supported PHP versions for an already supported extension:
   1. change the `install-php-extensions` script
   2. update the `data/supported-extensions` file, adding the new PHP version to the existing line corresponding to the updated extension
-- If you change some code that affects one or more extensions, please add a line with `Test: extension1, extension2` to your (last) commit message.
+- If you change some code that affects one or more extensions, please add a line with `Test: extension1, extension2` to the message of one of the pull request commits.
   Here's an example of a commit message:
   ```
   Improve the GD and ZIP extensions