diff --git a/.github/workflows/test-macos.yaml b/.github/workflows/test-macos.yaml
index 2b05001b30a..efe3bf09e30 100644
--- a/.github/workflows/test-macos.yaml
+++ b/.github/workflows/test-macos.yaml
@@ -42,6 +42,8 @@ jobs:
           rubygems: 3.3.26
           bundler: 2.3.26 # needed to fix issue with steep on Ruby 3.0/3.1
       - run: bundle install
+      # Specify gem version for 3.4 because default version (3.6.0.dev)
+      # leads to an incorrect gem root path
       - if: ${{ matrix.ruby == '3.4' }}
-        run: gem update --system 3.5.21 # the latest gem causes 3.4 macos failues
+        run: gem update --system 3.5.21
       - run: bundle exec rake spec:main