diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md
index d51bdecd..94116532 100644
--- a/PULL_REQUEST_TEMPLATE.md
+++ b/PULL_REQUEST_TEMPLATE.md
@@ -2,7 +2,9 @@
 READ THIS: Before creating a pull request, please consider the following first.
 
 * The most important thing you can do is write tests. Code without tests
-  probably doesn't work, and will almost certainly stop working later on.
+  probably doesn't work, and will almost certainly stop working later on. Pull
+  requests without tests probably won't be accepted, although there are some
+  exceptions.
 * Read the Contributing guide linked above first.
 * If you are adding a new linter, remember to update the README.md file and
   doc/ale.txt first.