diff --git a/Dockerfile.postgres b/Dockerfile.postgres
index 5bf4a11..9039be2 100644
--- a/Dockerfile.postgres
+++ b/Dockerfile.postgres
@@ -43,7 +43,7 @@ RUN apk add --no-cache runit && \
         php81-pecl-apcu \
         ncurses \
         xz \
-    && ln -s /usr/bin/php81 /usr/bin/php \
+    && ln -s /usr/bin/php81 /usr/bin/php
 RUN curl https://getcomposer.org/composer-stable.phar --output /usr/local/bin/composer && \
     chmod +x /usr/local/bin/composer
 COPY start.sh /usr/local/bin/start.sh
@@ -52,7 +52,7 @@ COPY sync-pull.runit /etc/service/sync-pull/run
 COPY sync-push.runit /etc/service/sync-push/run
 VOLUME /dumps
 WORKDIR /sync
-COPY composer.* /sync
+COPY composer.* /sync/
 COPY syncer /sync/syncer
 COPY sync /sync/sync
 COPY start.sh /sync/start.sh
diff --git a/bake.hcl b/bake.hcl
index f80b53d..80d01ec 100644
--- a/bake.hcl
+++ b/bake.hcl
@@ -6,12 +6,12 @@ group "default" {
     "postgres-11",
     "postgres-10",
     "mariadb-10-9",
-    #"mariadb-10-8",
-    #"mariadb-10-7",
-    #"mariadb-10-6",
-    #"mariadb-10-5",
-    #"mariadb-10-4",
-    #"mariadb-10-3",
+    "mariadb-10-8",
+    "mariadb-10-7",
+    "mariadb-10-6",
+    "mariadb-10-5",
+    "mariadb-10-4",
+    "mariadb-10-3",
   ]
 }
 
diff --git a/docker-compose.yml b/docker-compose.yml
index 6c1fc8c..436186a 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -70,3 +70,29 @@ services:
       - minio
     volumes:
       - ./:/sync
+
+  mariadb-10.3:
+    image: benzine/mysql:10.3
+    build:
+      context: .
+      target: mysql
+      dockerfile: Dockerfile.mariadb
+      args:
+        MARIADB_VERSION: 10.3
+    environment:
+      MARIADB_RANDOM_ROOT_PASSWORD: "yes"
+      MARIADB_USER: example
+      MARIADB_PASSWORD: changeme
+      MARIADB_DATABASE: s3db
+      S3_ENDPOINT: http://minio:9000/
+      S3_API_KEY: *s3_key
+      S3_API_SECRET: *s3_secret
+      S3_USE_PATH_STYLE_ENDPOINT: "yes"
+      S3_BUCKET: "s3db"
+      S3_PREFIX: "test/mariadb/"
+    ports:
+      - "127.0.0.127:3306:3306"
+    depends_on:
+      - minio
+    volumes:
+      - ./:/sync