diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 915cc5b..2e22d41 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # actions/checkout@v6 see https://github.com/actions/checkout/releases/tag/v6
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # actions/checkout@v6 see https://github.com/actions/checkout/releases/tag/v6
       with:
         fetch-depth: 0 # fetch everything
     - name: Set up Ruby
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b2d0ad2..b49a811 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -46,7 +46,7 @@ jobs:
       BUNDLE_GEMFILE: ${{ matrix.gemfile }}
 
     steps:
-    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # actions/checkout@v6 see https://github.com/actions/checkout/releases/tag/v6
+    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # actions/checkout@v6 see https://github.com/actions/checkout/releases/tag/v6
     - name: Set up Ruby
       uses: ruby/setup-ruby@afeafc3d1ab54a631816aba4c914a0081c12ff2f # ruby/setup-ruby@v1 see https://github.com/ruby/setup-ruby/tree/v1
       with:
diff --git a/gemfiles/Gemfile.rails61 b/gemfiles/Gemfile.rails61
index 8fdb206..a82521f 100644
--- a/gemfiles/Gemfile.rails61
+++ b/gemfiles/Gemfile.rails61
@@ -10,3 +10,6 @@ gem 'sqlite3', '~> 1.7'
 
 # Latest concurrent-ruby breaks Rails < 7.1. See https://github.com/rails/rails/issues/54260
 gem 'concurrent-ruby', '1.3.4'
+
+# Rails <= 8.0 does not support minitest 6
+gem 'minitest', '>= 5.11', '< 6.0'
diff --git a/gemfiles/Gemfile.rails70 b/gemfiles/Gemfile.rails70
index 085807e..edf0478 100644
--- a/gemfiles/Gemfile.rails70
+++ b/gemfiles/Gemfile.rails70
@@ -10,3 +10,6 @@ gem 'sqlite3', '~> 1.7'
 
 # Latest concurrent-ruby breaks Rails < 7.1. See https://github.com/rails/rails/issues/54260
 gem 'concurrent-ruby', '1.3.4'
+
+# Rails <= 8.0 does not support minitest 6
+gem 'minitest', '>= 5.11', '< 6.0'
diff --git a/gemfiles/Gemfile.rails71 b/gemfiles/Gemfile.rails71
index 50624d7..b3b57e7 100644
--- a/gemfiles/Gemfile.rails71
+++ b/gemfiles/Gemfile.rails71
@@ -6,3 +6,6 @@ gem 'rails', '~> 7.1.0'
 
 # sqlite3 2.x is not supported on ruby 3.0
 gem 'sqlite3', '~> 1.7'
+
+# Rails <= 8.0 does not support minitest 6
+gem 'minitest', '>= 5.11', '< 6.0'
diff --git a/gemfiles/Gemfile.rails72 b/gemfiles/Gemfile.rails72
index 778829b..b263f6b 100644
--- a/gemfiles/Gemfile.rails72
+++ b/gemfiles/Gemfile.rails72
@@ -3,3 +3,6 @@ source 'https://rubygems.org'
 gemspec path: '..'
 
 gem 'rails', '~> 7.2.0'
+
+# Rails <= 8.0 does not support minitest 6
+gem 'minitest', '>= 5.11', '< 6.0'