diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c7c16ec6..b6547820 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,6 +10,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   test-oldsphinx:
     runs-on: ${{ matrix.os }}-latest