diff --git a/extensions/jdbc/jdbc-postgresql/deployment/src/test/java/io/quarkus/jdbc/postgresql/deployment/DevServicesPostgresqlDatasourceNamedWithUsernameTestCase.java b/extensions/jdbc/jdbc-postgresql/deployment/src/test/java/io/quarkus/jdbc/postgresql/deployment/DevServicesPostgresqlDatasourceNamedWithUsernameTestCase.java
new file mode 100644
index 0000000000000..e888609d19b6c
--- /dev/null
+++ b/extensions/jdbc/jdbc-postgresql/deployment/src/test/java/io/quarkus/jdbc/postgresql/deployment/DevServicesPostgresqlDatasourceNamedWithUsernameTestCase.java
@@ -0,0 +1,48 @@
+package io.quarkus.jdbc.postgresql.deployment;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
+
+import java.sql.Connection;
+
+import javax.inject.Inject;
+import javax.inject.Named;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.agroal.api.AgroalDataSource;
+import io.agroal.api.configuration.AgroalConnectionPoolConfiguration;
+import io.quarkus.test.QuarkusUnitTest;
+
+public class DevServicesPostgresqlDatasourceNamedWithUsernameTestCase {
+
+    @RegisterExtension
+    static QuarkusUnitTest test = new QuarkusUnitTest()
+            .withEmptyApplication()
+            .overrideConfigKey("quarkus.datasource.\"DB2\".db-kind", "postgresql")
+            .overrideConfigKey("quarkus.datasource.\"DB2\".username", "foo")
+            .overrideConfigKey("quarkus.datasource.\"DB2\".password", "foo");
+
+    @Inject
+    @Named("DB2")
+    AgroalDataSource dataSource;
+
+    @Test
+    public void testDatasource() throws Exception {
+        AgroalConnectionPoolConfiguration configuration = null;
+
+        try {
+            configuration = dataSource.getConfiguration().connectionPoolConfiguration();
+        } catch (NullPointerException e) {
+            // we catch the NPE here as we have a proxycd and we can't test dataSource directly
+            fail("Datasource should not be null");
+        }
+        assertTrue(configuration.connectionFactoryConfiguration().jdbcUrl().contains("jdbc:postgresql:"));
+        assertEquals("foo", configuration.connectionFactoryConfiguration().principal().getName());
+
+        try (Connection connection = dataSource.getConnection()) {
+        }
+    }
+}