private void performSimpleTestWithCharacterSet(String jdbcUrl) throws SQLException {
        HikariDataSource datasource1 = verifyCharacterSet(jdbcUrl);
        HikariDataSource datasource2 = verifyCharacterSet(jdbcUrl);
        datasource1.close();
        datasource2.close();
    }
This method intentionally verifies encoding twice to ensure that the query string parameters are used when
Connections are created from cached containers.

@param jdbcUrl
@throws SQLException
modules/jdbc-test/src/main/java/org/testcontainers/jdbc/AbstractJDBCDriverTest.java