diff --git a/.github/workflows/maven-verify.yml b/.github/workflows/maven-verify.yml
index e129d79..d1712ee 100644
--- a/.github/workflows/maven-verify.yml
+++ b/.github/workflows/maven-verify.yml
@@ -75,6 +75,10 @@ jobs:
           database: ${{ inputs.db-name }}
           port: ${{ inputs.db-port }}
 
+      - name: Test PostgreSQL connection
+        if: inputs.db-type == 'postgresql'
+        run: pg_isready --host=localhost --port=${{ inputs.db-port }} --dbname=${{ inputs.db-name }} --username=${{ inputs.db-username }}
+
       - # https://github.com/ankane/setup-mongodb
         # copied from FDP v1.17.2 build.yml
         # TODO: ankane/setup-mongodb is a one-man band, should we use an alternative?
diff --git a/.github/workflows/test-maven-verify.yml b/.github/workflows/test-maven-verify.yml
index a858ccc..3edd180 100644
--- a/.github/workflows/test-maven-verify.yml
+++ b/.github/workflows/test-maven-verify.yml
@@ -37,7 +37,7 @@ jobs:
             db_name: 'test'
             db_username: 'test'
             db_password: 'test'
-            db_port: 5432
+            db_port: 54321
     uses: ./.github/workflows/maven-verify.yml
     with:
       runner: ${{ matrix.runner }}