diff --git a/.github/workflows/test-diffcalc.yml b/.github/workflows/test-diffcalc.yml
index 3d80f08ebf..48e1e238c1 100644
--- a/.github/workflows/test-diffcalc.yml
+++ b/.github/workflows/test-diffcalc.yml
@@ -1,3 +1,8 @@
+# Listens to new PR comments containing "!pp check", and runs diffcalc across the PR and master to produce a table of differences.
+# Usage:
+# !pp check 0     : Runs only the osu! ruleset
+# !pp check 0 1   : Runs the osu! and taiko rulesets.
+
 name: Diffcalc Consistency Checks
 on:
   issue_comment:
@@ -18,8 +23,8 @@ jobs:
     if: |
       contains(github.event.comment.html_url, '/pull/') &&
       contains(github.event.comment.body, '!pp check') &&
-      ${{ github.event.comment.author_association == 'MEMBER' }}
-
+      ${{ github.event.comment.author_association == 'MEMBER' }} &&
+      contains(github.event.comment.body, ${{ matrix.ruleset.id }})
 
     strategy:
       fail-fast: false