diff --git a/.github/actions/test-ruby/action.yml b/.github/actions/test-ruby/action.yml
index a63e9508..8c2fca40 100644
--- a/.github/actions/test-ruby/action.yml
+++ b/.github/actions/test-ruby/action.yml
@@ -26,6 +26,10 @@ inputs:
     required: false
     description: Reviewdog report
     default: 'false'
+  ADDITIONAL_SETUP:
+    type: string
+    default: '[]'
+    description: 'JSON array of additional setup commands'
 
 runs:
   using: "composite"
@@ -44,6 +48,17 @@ runs:
         bundler-cache: true
         ruby-version: ${{ inputs.RUBY_VERSION }}
 
+    - name: Additional Setup
+      if: inputs.ADDITIONAL_SETUP != '[]'
+      shell: bash
+      env:
+        ADDITIONAL_SETUP: ${{ inputs.ADDITIONAL_SETUP }}
+      run: |
+        echo "$ADDITIONAL_SETUP" | jq -r '.[]' | while read -r command; do
+          echo "Executing additional setup command: $command"
+          $command
+        done
+
     - uses: actions/cache@v4
       with:
         path: vendor/bundle
diff --git a/.github/workflows/ci-check.yml b/.github/workflows/ci-check.yml
index ad7c6039..eb15e93d 100644
--- a/.github/workflows/ci-check.yml
+++ b/.github/workflows/ci-check.yml
@@ -61,6 +61,10 @@ on:
       RUBY_RAKE_COMMANDS:
         type: string
         description: A comma-separated list of rake commands.
+      ADDITIONAL_SETUP:
+        type: string
+        default: '[]'
+        description: 'JSON array of additional setup commands'
       ZEITWERK:
         type: boolean
         description: Zeitwerk run.
@@ -199,6 +203,7 @@ jobs:
         RUBY_VERSION: ${{ inputs.RUBY_VERSION }}
         ENV_PATH: ${{ inputs.ENV_PATH }}
         RUBY_RAKE_COMMANDS: ${{ inputs.RUBY_RAKE_COMMANDS }}
+        ADDITIONAL_SETUP: ${{ inputs.ADDITIONAL_SETUP }}
         ZEITWERK: ${{ inputs.ZEITWERK }}
         BRAKEMAN: ${{ inputs.BRAKEMAN }}
         RUBOCOP: ${{ inputs.RUBOCOP }}
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 51c0c74f..b4ff3e30 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -115,6 +115,10 @@ on:
       RUBY_RAKE_COMMANDS:
         type: string
         description: A comma-separated list of rake commands.
+      ADDITIONAL_SETUP:
+        type: string
+        default: '[]'
+        description: 'JSON array of additional setup commands'
       ZEITWERK:
         type: boolean
         description: Zeitwerk run.
@@ -229,6 +233,7 @@ jobs:
       ENV_PATH: ${{ inputs.ENV_PATH }}
       TEST_CREATE_NETWORK: ${{ inputs.TEST_CREATE_NETWORK }}
       RUBY_RAKE_COMMANDS: ${{ inputs.RUBY_RAKE_COMMANDS }}
+      ADDITIONAL_SETUP: ${{ inputs.ADDITIONAL_SETUP }}
       ZEITWERK: ${{ inputs.ZEITWERK }}
       BRAKEMAN: ${{ inputs.BRAKEMAN }}
       RUBOCOP: ${{ inputs.RUBOCOP }}