diff --git a/app/Http/Controllers/Admin/FieldMonsterCrudController.php b/app/Http/Controllers/Admin/FieldMonsterCrudController.php
index 64f2a8d47..0e1459ace 100644
--- a/app/Http/Controllers/Admin/FieldMonsterCrudController.php
+++ b/app/Http/Controllers/Admin/FieldMonsterCrudController.php
@@ -33,6 +33,7 @@ protected function setupCreateOperation()
         Widget::add()->type('script')->content('assets/js/monster/test-unrequire-field.js');
         Widget::add()->type('script')->content('assets/js/monster/test-custom-field.js');
         Widget::add()->type('script')->content('assets/js/monster/test-onchange-field.js');
+        Widget::add()->type('script')->content('assets/js/monster/test-readonly-field.js');
     }
 
     protected function setupFieldsForTopScenarios()
diff --git a/public/assets/js/monster/test-readonly-field.js b/public/assets/js/monster/test-readonly-field.js
new file mode 100644
index 000000000..b010bd9dd
--- /dev/null
+++ b/public/assets/js/monster/test-readonly-field.js
@@ -0,0 +1,27 @@
+/**
+ * This file tests the crud.field('name').readonly() method
+ * on all Monster field types, assuming the fields.js
+ * file is already loaded.
+ */
+
+$('nav[aria-label=breadcrumb]').append('<a class="btn btn-warning ml-1 mb-4" href="javascript:testCrudFieldReadonlyOn()">readonlyOn()</a>');
+$('nav[aria-label=breadcrumb]').append('<a class="btn btn-warning ml-1 mb-4" href="javascript:testCrudFieldReadonlyOff()">readonlyOff()</a>');
+
+function testCrudFieldReadonlyOn() {
+    // go through all Monster fields and disable them
+    for (var i = 0; i <= monsterFields.length - 1; i++) {
+        crud.field(monsterFields[i]).readonly();
+    }
+
+    alert('Calling readonly() on all monster fields. If you can see a field that is NOT readonly... then readonly() might not work on it, please investigate.');
+}
+
+function testCrudFieldReadonlyOff() {
+    // go through all Monster fields and disable them
+    for (var i = 0; i <= monsterFields.length - 1; i++) {
+        crud.field(monsterFields[i]).readonly(false);
+    }
+
+    alert('Calling readonly(false) on all monster fields. If you can see a field that is STILL readonly after... then readonly() might not work on it, please investigate.');
+}
+