diff --git a/core/tests/Drupal/FunctionalJavascriptTests/Core/Form/JavascriptStatesTest.php b/core/tests/Drupal/FunctionalJavascriptTests/Core/Form/JavascriptStatesTest.php
index 2d6f3f1430..9661433598 100644
--- a/core/tests/Drupal/FunctionalJavascriptTests/Core/Form/JavascriptStatesTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/Core/Form/JavascriptStatesTest.php
@@ -211,6 +211,37 @@ protected function doCheckboxTriggerTests() {
     // Only value1 should be disabled, value 2 should remain enabled.
     $this->assertTrue($radios_some_disabled_value1->hasAttribute('disabled'));
     $this->assertFalse($radios_some_disabled_value2->hasAttribute('disabled'));
+
+    // Change state: uncheck the checkbox.
+    $trigger->uncheck();
+    // Verify triggered state, which should match the initial state.
+    $this->assertTrue($textfield_invisible_element->isVisible());
+    $this->assertFalse($details->hasAttribute('open'));
+    $this->assertFalse($textfield_in_details->isVisible());
+    $this->assertFalse($textfield_required_element->hasAttribute('required'));
+    $this->assertFalse($checkbox_checked_element->isChecked());
+    $this->assertTrue($checkbox_unchecked_element->isChecked());
+    $this->assertFalse($checkbox_visible_element->isVisible());
+    $this->assertTrue($text_format_invisible_value->isVisible());
+    $this->assertTrue($text_format_invisible_format->isVisible());
+    $this->assertFalse($checkboxes_all_checked_element_value1->isChecked());
+    $this->assertFalse($checkboxes_all_checked_element_value2->isChecked());
+    $this->assertFalse($checkboxes_all_checked_element_value3->isChecked());
+    $this->assertFalse($checkboxes_some_checked_element_value1->isChecked());
+    $this->assertFalse($checkboxes_some_checked_element_value2->isChecked());
+    $this->assertFalse($checkboxes_some_checked_element_value3->isChecked());
+    $this->assertFalse($checkboxes_all_disabled_element_value1->hasAttribute('disabled'));
+    $this->assertFalse($checkboxes_all_disabled_element_value2->hasAttribute('disabled'));
+    $this->assertFalse($checkboxes_all_disabled_element_value3->hasAttribute('disabled'));
+    $this->assertFalse($checkboxes_some_disabled_element_value1->hasAttribute('disabled'));
+    $this->assertFalse($checkboxes_some_disabled_element_value2->hasAttribute('disabled'));
+    $this->assertFalse($checkboxes_some_disabled_element_value3->hasAttribute('disabled'));
+    $this->assertFalse($radios_checked_element->isChecked());
+    $this->assertEquals(NULL, $radios_checked_element->getValue());
+    $this->assertFalse($radios_all_disabled_value1->hasAttribute('disabled'));
+    $this->assertFalse($radios_all_disabled_value2->hasAttribute('disabled'));
+    $this->assertFalse($radios_some_disabled_value1->hasAttribute('disabled'));
+    $this->assertFalse($radios_some_disabled_value2->hasAttribute('disabled'));
   }
 
   /**