diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f9db9b5..9cc075c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,9 +12,15 @@ jobs:
     needs: ruby-versions
     name: build (${{ matrix.ruby }} / ${{ matrix.os }})
     strategy:
+      fail-fast: false
       matrix:
         ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
         os: [ ubuntu-latest, macos-latest ]
+        # CRuby < 2.6 does not support macos-arm64, so test those on amd64 instead
+        exclude:
+        - { os: macos-latest, ruby: '2.5' }
+        include:
+        - { os: macos-13, ruby: '2.5' }
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4