diff --git a/.github/workflows/pyrefly-diff-comment.yml b/.github/workflows/pyrefly-diff-comment.yml
index b9790945f9..b21aa17483 100644
--- a/.github/workflows/pyrefly-diff-comment.yml
+++ b/.github/workflows/pyrefly-diff-comment.yml
@@ -77,8 +77,15 @@ jobs:
             }
 
             const body = diff.trim()
-              ? `### Pyrefly Diff (base → PR)\\n\\`\\`\\`diff\\n${diff}\\n\\`\\`\\``
-              : '### Pyrefly Diff\\nNo changes detected.';
+              ? `### Pyrefly Diff
+<details>
+<summary>base → PR</summary>
+
+\`\`\`diff
+${diff}
+\`\`\`
+</details>`
+              : '### Pyrefly Diff\nNo changes detected.';
 
             await github.rest.issues.createComment({
               issue_number: prNumber,
diff --git a/.github/workflows/pyrefly-diff.yml b/.github/workflows/pyrefly-diff.yml
index 7dc407c11c..0311187d44 100644
--- a/.github/workflows/pyrefly-diff.yml
+++ b/.github/workflows/pyrefly-diff.yml
@@ -74,7 +74,14 @@ jobs:
             }
 
             const body = diff.trim()
-              ? `### Pyrefly Diff (base → PR)\n\`\`\`diff\n${diff}\n\`\`\``
+              ? `### Pyrefly Diff
+<details>
+<summary>base → PR</summary>
+
+\`\`\`diff
+${diff}
+\`\`\`
+</details>`
               : '### Pyrefly Diff\nNo changes detected.';
 
             await github.rest.issues.createComment({