diff -u b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
--- b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
+++ b/core/tests/Drupal/FunctionalTests/AssertLegacyTrait.php
@@ -611,12 +611,11 @@
       $found = FALSE;
       if ($fields) {
         foreach ($fields as $field) {
-          if ($field->getAttribute('type') == 'checkbox') {
-            // Checkbox with the correct checked state if the value was passed
-            // as a boolean.
-            $found = !is_bool($value) || $field->isChecked() === $value;
+          if ($field->getAttribute('value') == $value) {
+            // Input element with correct value.
+            $found = TRUE;
           }
-          elseif ($field->getTagName() == 'select' && $field->find('xpath', '//option[@value = ' . (new Escaper())->escapeLiteral($value) . ' and @selected = "selected"]')) {
+          elseif ($field->find('xpath', '//option[@value = ' . (new Escaper())->escapeLiteral($value) . ' and @selected = "selected"]')) {
             // Select element with an option.
             $found = TRUE;
           }
@@ -624,10 +623,6 @@
             // Text area with correct text.
             $found = TRUE;
           }
-          elseif ($field->getAttribute('value') == $value) {
-            // Input element with correct value.
-            $found = TRUE;
-          }
         }
       }
     }