When this option is selected, a special parameter can be added to checkout URLs to force the order to be processed using the test mode of the selected onsite/offsite method (if test mode is supported). This allows for test orders to be created and processed through a particular payment method on production sites without disrupting normal operations. The parameter name is <code>pso</code> and its value has to match the value entered below: </p> <p style="margin-left:10px; font-size:11px;"> <em>Override Key</em> <br/> <span style="font-family:courier;"> <input type='text' value='<?php echo $p->getProductionProcessorOverrideKey(); ?> ' id='test_production_processor_override_key' name='payment_service[test][production_processor_override_key]' style='width: 175px;' /> <input type='button' class="mm-ui-button blue" value='Generate' id='test_production_processor_override_key_generate'> </span> </p> <p style="font-size:11px; margin-left:10px; padding-right:20px;"> <em>Example On Demand Test Link</em> <br/> <span style="font-family:courier; font-size:11px;"> <?php echo MM_TestPaymentService::getExampleCheckoutLink(); ?> &<span style='font-weight: bold;'>pso=<span id='test_production_processor_override_key_example_key'><?php echo $p->getProductionProcessorOverrideKey() !== "" ? $p->getProductionProcessorOverrideKey() : "yourkey"; ?> </span></span> </span> </p> </div> --> </div> </div>