diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4c7c06d..6c10886 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -32,9 +32,14 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby }}
           bundler-cache: true # 'bundle install' and cache
-      - name: Ensure new-enough RubyGems
+      - name: Ensure new-enough RubyGems for Ruby 2.6
         run: gem update --system
-        if: ${{ matrix.ruby == '2.6' || matrix.ruby == '2.5' }}
+        if: ${{ matrix.ruby == '2.6' }}
+      - name: Ensure new-enough RubyGems for Ruby 2.5
+        run: |
+          gem install -v "~> 3.3.26"
+          update_rubygems
+        if: ${{ matrix.ruby == '2.5' }}
       - name: Run test
         run: bundle exec rake
         env: