diff --git a/.github/workflows/maven-ci.yml b/.github/workflows/maven-ci.yml
index 34446b6..872d6c5 100644
--- a/.github/workflows/maven-ci.yml
+++ b/.github/workflows/maven-ci.yml
@@ -6,32 +6,6 @@ jobs:
   build:
     runs-on: ubuntu-latest
     services:
-      mysql:
-        image: mysql
-        env:
-          MYSQL_ROOT_PASSWORD: casbin_test
-          MYSQL_DATABASE: casbin
-          MYSQL_USER: casbin_test
-          MYSQL_PASSWORD: TEST_casbin
-        ports:
-          - 3306:3306
-        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=3
-      postgres:
-        image: postgres
-        env:
-          POSTGRES_DB: casbin
-          POSTGRES_USER: casbin_test
-          POSTGRES_PASSWORD: TEST_casbin
-        ports:
-          - 5432:5432
-        options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 5
-      sqlserver:
-        image: mcr.microsoft.com/mssql/server:2019-latest
-        env:
-          SA_PASSWORD: 9G3iqmzQDw9zCXII
-          ACCEPT_EULA: Y
-        ports:
-          - 1433:1433
       mongodb:
         image: mongo
         ports:
@@ -44,17 +18,6 @@ jobs:
         with:
           fetch-depth: '0'
 
-      - name: Install mssql-tools
-        run: |
-          curl https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -
-          curl https://packages.microsoft.com/config/ubuntu/16.04/prod.list | sudo tee /etc/apt/sources.list.d/msprod.list
-          sudo apt-get update
-          sudo apt-get install mssql-tools unixodbc-dev
-          echo 'export PATH="$PATH:/opt/mssql-tools/bin"' >> ~/.bash_profile
-
-      - name: Create database for sqlserver
-        run: sqlcmd -S 127.0.0.1,1433 -U sa -P '9G3iqmzQDw9zCXII' -Q "CREATE DATABASE casbin"
-
       - name: Set up JDK 1.8
         uses: actions/setup-java@v1
         with: