diff --git a/modules/simpletest/tests/form.test b/modules/simpletest/tests/form.test
index 49b561a63f4..23af5f4c7fc 100644
--- a/modules/simpletest/tests/form.test
+++ b/modules/simpletest/tests/form.test
@@ -240,14 +240,14 @@ class FormsTestCase extends DrupalWebTestCase {
     $values = drupal_json_decode($this->drupalPost(NULL, array('required_checkbox' => 1), t('Submit')));
     $expected_values = array(
       'disabled_checkbox_on' => 'disabled_checkbox_on',
-      'disabled_checkbox_off' => '',
+      'disabled_checkbox_off' => 0,
       'checkbox_on' => 'checkbox_on',
-      'checkbox_off' => '',
+      'checkbox_off' => 0,
       'zero_checkbox_on' => '0',
-      'zero_checkbox_off' => '',
+      'zero_checkbox_off' => 0,
     );
     foreach ($expected_values as $widget => $expected_value) {
-      $this->assertEqual($values[$widget], $expected_value, format_string('Checkbox %widget returns expected value (expected: %expected, got: %value)', array(
+      $this->assertIdentical($values[$widget], $expected_value, format_string('Checkbox %widget returns expected value (expected: %expected, got: %value)', array(
         '%widget' => var_export($widget, TRUE),
         '%expected' => var_export($expected_value, TRUE),
         '%value' => var_export($values[$widget], TRUE),