diff --git a/resources/views/portal/ninja2020/invoices/payment.blade.php b/resources/views/portal/ninja2020/invoices/payment.blade.php
index 2673b298d1c8..4f2b8451855f 100644
--- a/resources/views/portal/ninja2020/invoices/payment.blade.php
+++ b/resources/views/portal/ninja2020/invoices/payment.blade.php
@@ -100,6 +100,7 @@
                                                     type="text"
                                                     class="input mt-0 mr-4 relative"
                                                     name="payable_invoices[{{$key}}][amount]"
+                                                    dusk="underpayment-input"
                                                     value="{{ $invoice->partial > 0 ? $invoice->partial : $invoice->balance }}"/>
                                             </label>
                                         </div>