diff --git a/.env_sample b/.env_sample
index a5a10b0a..2833570f 100644
--- a/.env_sample
+++ b/.env_sample
@@ -1 +1,2 @@
 export POSTGRES_DATABASE_URL="postgres://postgres:password@localhost:5432/postgres"
+export MARIA_DATABASE_URL="mysql://maria:password@localhost:3306/maria"
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 67237654..2e3555ec 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -40,6 +40,17 @@ jobs:
         ports:
           - 6379:6379
 
+      mcaptcha-smtp:
+        image: maildev/maildev
+        env:
+          MAILDEV_WEB_PORT: "1080"
+          MAILDEV_INCOMING_USER: "admin"
+          MAILDEV_INCOMING_PASS: "password"
+        ports:
+          - 1080:1080
+          - 10025:1025
+
+
       maria:
         image: mariadb
         env: MARIADB_USER:maria
@@ -72,15 +83,14 @@ jobs:
       - name: load env
         run: |
           source .env_sample \
-            && echo "POSTGRES_DATABASE_URL=$POSTGRES_DATABASE_URL" >> $GITHUB_ENV 
+            && echo "POSTGRES_DATABASE_URL=$POSTGRES_DATABASE_URL" >> $GITHUB_ENV \
+            && echo "MARIA_DATABASE_URL=$MARIA_DATABASE_URL" >> $GITHUB_ENV
+
 
       - uses: actions/setup-node@v2
         with:
           node-version: "16.x"
 
-      - name: start smtp server
-        run: docker run -d -p 1080:1080 -p 10025:1025  maildev/maildev --incoming-user admin --incoming-pass password
-
       - name: Install ${{ matrix.version }}
         uses: actions-rs/toolchain@v1
         with:
@@ -98,6 +108,7 @@ jobs:
         run: make migrate
         env:
           POSTGRES_DATABASE_URL: "${{ env.POSTGRES_DATABASE_URL }}"
+          MARIA_DATABASE_URL: "${{ env.MARIA_DATABASE_URL }}"
 
       - name: build frontend
         run: make frontend
@@ -110,6 +121,7 @@ jobs:
           args: "-t 1200"
         env:
           POSTGRES_DATABASE_URL: "${{ env.POSTGRES_DATABASE_URL }}"
+          MARIA_DATABASE_URL: "${{ env.MARIA_DATABASE_URL }}"
           # GIT_HASH is dummy value. I guess build.rs is skipped in tarpaulin
           # execution so this value is required for preventing meta tests from
           # panicking
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 8dc82cca..4af78665 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -83,7 +83,8 @@ jobs:
       - name: load env
         run: |
           source .env_sample \
-            && echo "POSTGRES_DATABASE_URL=$POSTGRES_DATABASE_URL" >> $GITHUB_ENV
+            && echo "POSTGRES_DATABASE_URL=$POSTGRES_DATABASE_URL" >> $GITHUB_ENV \
+            && echo "MARIA_DATABASE_URL=$MARIA_DATABASE_URL" >> $GITHUB_ENV
 
       - uses: actions/setup-node@v2
         with:
@@ -100,12 +101,13 @@ jobs:
         run: make migrate
         env:
           POSTGRES_DATABASE_URL: "${{ env.POSTGRES_DATABASE_URL }}"
+          MARIA_DATABASE_URL: "${{ env.MARIA_DATABASE_URL }}"
 
       - name: build
         run: make
         env:
-          POSTGRES_DATABASE_URL:
-            "${{ env.POSTGRES_DATABASE_URL }}"
+          POSTGRES_DATABASE_URL: "${{ env.POSTGRES_DATABASE_URL }}"
+          MARIA_DATABASE_URL: "${{ env.MARIA_DATABASE_URL }}"
 
             #      - name: build frontend
             #        run: make frontend
@@ -117,6 +119,7 @@ jobs:
         run: make test
         env:
           POSTGRES_DATABASE_URL: "${{ env.POSTGRES_DATABASE_URL }}"
+          MARIA_DATABASE_URL: "${{ env.MARIA_DATABASE_URL }}"
 
       - name: Login to DockerHub
         if: (github.ref == 'refs/heads/master' || github.event_name == 'push') && github.repository == 'mCaptcha/mCaptcha'
@@ -134,6 +137,7 @@ jobs:
         run: make doc
         env:
           POSTGRES_DATABASE_URL: "${{ env.POSTGRES_DATABASE_URL }}"
+          MARIA_DATABASE_URL: "${{ env.MARIA_DATABASE_URL }}"
           GIT_HASH: 8e77345f1597e40c2e266cb4e6dee74888918a61 # dummy value
           COMPILED_DATE: "2021-07-21"