diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 555b1fcaf..90262f428 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -2,11 +2,12 @@ name: Benchmark
 
 on:
   issue_comment:
-    types: [created]
+    types: created
 
 jobs:
   benchmark_base:
-    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/run-benchmark')
+    # On pull requests and if the comment starts with `/run-benchmark`
+    if: github.event.issue.pull_request != null && startsWith(github.event.comment.body, '/run-benchmark')
     runs-on: self-hosted
 
     steps: