diff --git a/.hyperhive/review-classifier.yml b/.hyperhive/review-classifier.yml
index 7b9da6d9..3874f7e2 100644
--- a/.hyperhive/review-classifier.yml
+++ b/.hyperhive/review-classifier.yml
@@ -72,8 +72,10 @@ classifications:
       operator sees, so adding or changing one needs none of these. A diff
       that changes nothing an operator or user sees makes the question not
       applicable: a pure internal refactor, a move between modules or
-      crates, a rename of private items, or an edit to comments and doc
-      comments.
+      crates, a rename of private items, an edit to comments and doc
+      comments, or a purely visual restyle that adds, removes, moves or
+      renames no control or label and changes no behaviour, such as colours,
+      contrast, spacing or a keyboard focus ring.
     polarity: positive
     threshold: 65
   - name: one-purpose