diff -u b/core/modules/filter/src/Element/TextFormat.php b/core/modules/filter/src/Element/TextFormat.php
--- b/core/modules/filter/src/Element/TextFormat.php
+++ b/core/modules/filter/src/Element/TextFormat.php
@@ -165,8 +165,7 @@
       }
     }
 
-    // Set the #states property of the filter format element to the same value
-    // as the value element, if the value element has #states set.
+    // If the value element has #states set, copy it to the format element.
     if (isset($element['value']['#states'])) {
       $element['format']['#states'] = $element['value']['#states'];
     }
diff -u b/core/tests/Drupal/FunctionalJavascriptTests/Core/Form/JavascriptStatesTest.php b/core/tests/Drupal/FunctionalJavascriptTests/Core/Form/JavascriptStatesTest.php
--- b/core/tests/Drupal/FunctionalJavascriptTests/Core/Form/JavascriptStatesTest.php
+++ b/core/tests/Drupal/FunctionalJavascriptTests/Core/Form/JavascriptStatesTest.php
@@ -88,10 +88,10 @@
     $this->assertNotEmpty($checkbox_unchecked_element);
     $checkbox_visible_element = $page->findField('checkbox_visible_when_checkbox_trigger_checked');
     $this->assertNotEmpty($checkbox_visible_element);
-    $text_format_invisible_when_checkbox_trigger_checked_value = $page->findField('text_format_invisible_when_checkbox_trigger_checked[value]');
-    $text_format_invisible_when_checkbox_trigger_checked_format = $page->findField('text_format_invisible_when_checkbox_trigger_checked[format]');
-    $this->assertNotEmpty($text_format_invisible_when_checkbox_trigger_checked_value);
-    $this->assertNotEmpty($text_format_invisible_when_checkbox_trigger_checked_format);
+    $text_format_invisible_value = $page->findField('text_format_invisible_when_checkbox_trigger_checked[value]');
+    $this->assertNotEmpty($text_format_invisible_value);
+    $text_format_invisible_format = $page->findField('text_format_invisible_when_checkbox_trigger_checked[format]');
+    $this->assertNotEmpty($text_format_invisible_format);
 
     // Verify initial state.
     $this->assertTrue($textfield_invisible_element->isVisible());
@@ -101,8 +101,8 @@
     $this->assertFalse($checkbox_checked_element->isChecked());
     $this->assertTrue($checkbox_unchecked_element->isChecked());
     $this->assertFalse($checkbox_visible_element->isVisible());
-    $this->assertTrue($text_format_invisible_when_checkbox_trigger_checked_value->isVisible());
-    $this->assertTrue($text_format_invisible_when_checkbox_trigger_checked_format->isVisible());
+    $this->assertTrue($text_format_invisible_value->isVisible());
+    $this->assertTrue($text_format_invisible_format->isVisible());
 
     // Change state: check the checkbox.
     $trigger->check();
@@ -114,8 +114,8 @@
     $this->assertTrue($checkbox_checked_element->isChecked());
     $this->assertFalse($checkbox_unchecked_element->isChecked());
     $this->assertTrue($checkbox_visible_element->isVisible());
-    $this->assertFalse($text_format_invisible_when_checkbox_trigger_checked_value->isVisible());
-    $this->assertFalse($text_format_invisible_when_checkbox_trigger_checked_format->isVisible());
+    $this->assertFalse($text_format_invisible_value->isVisible());
+    $this->assertFalse($text_format_invisible_format->isVisible());
   }
 
   /**