diff --git a/.github/workflows/multi-job-cache.yml b/.github/workflows/multi-job-cache.yml
index 1ef7422..8fa31cb 100644
--- a/.github/workflows/multi-job-cache.yml
+++ b/.github/workflows/multi-job-cache.yml
@@ -44,7 +44,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: ${{ github.actor == 'dependabot[bot]' && fromJSON('["ubuntu-latest"]') || fromJSON('["ubuntu-latest", "macos-latest", "windows-latest"]') }}
 
     name: Test multi-job cache (2) on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}