diff --git a/.hyperhive/review-classifier.yml b/.hyperhive/review-classifier.yml
index bb5f5fa2..709c0adf 100644
--- a/.hyperhive/review-classifier.yml
+++ b/.hyperhive/review-classifier.yml
@@ -33,12 +33,14 @@ classifications:
     threshold: 75
   - name: tests-with-behaviour
     description: >-
-      Every change to how the code behaves comes with a new or updated test
-      that exercises it. A diff whose changed files are all test code
-      (a fixture under `nix/module-eval/`, `nix/checks.nix`, a crate's
+      Every change to Rust or application code behaviour comes with a new or
+      updated test that exercises it. A diff whose changed files are all test
+      code (a fixture under `nix/module-eval/`, `nix/checks.nix`, a crate's
       `tests/` directory, or Rust inside `#[cfg(test)]` or a `#[test]`
-      function) changes no behaviour: the question is not applicable. A PR
-      that changes behaviour and tests together matches.
+      function) changes no behaviour: the question is not applicable. A NixOS
+      module assertion, a Grafana/alerting rule, or the literal text of a log
+      or tracing message is not held to this either. A PR that changes
+      behaviour and tests together matches.
     polarity: positive
     threshold: 65
   - name: docs-updated