diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 66fcb1b77..7651bcfae 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -3,6 +3,9 @@ on:
   push:
     branches: master
   pull_request:
+permissions:
+  contents: read
+
 jobs:
   tests:
     runs-on: ${{ matrix.os }}