diff --git a/src/View/Widget/Radio.php b/src/View/Widget/Radio.php
index e384e79d363..ca42f67fd52 100644
--- a/src/View/Widget/Radio.php
+++ b/src/View/Widget/Radio.php
@@ -78,6 +78,8 @@ public function __construct($templates, $label) {
  * - `val` - A string of the option to mark as selected.
  * - `label` - Either false to disable label generation, or
  *   an array of attributes for all labels.
+ * - `required` - Set to true to add the required attribute
+ *   on all generated radios.
  *
  * @param array $data The data to build radio buttons with.
  * @return string
@@ -152,6 +154,10 @@ protected function _renderInput($val, $text, $data) {
 			$radio['id'] = $this->_id($radio);
 		}
 
+		if (isset($data['val']) && is_bool($data['val'])) {
+			$data['val'] = $data['val'] ? 1 : 0;
+		}
+
 		if (isset($data['val']) && strval($data['val']) === strval($radio['value'])) {
 			$radio['checked'] = true;
 		}
@@ -159,6 +165,9 @@ protected function _renderInput($val, $text, $data) {
 		if ($this->_isDisabled($radio, $data['disabled'])) {
 			$radio['disabled'] = true;
 		}
+		if (!empty($data['required'])) {
+			$radio['required'] = true;
+		}
 
 		$input = $this->_templates->format('radio', [
 			'name' => $radio['name'],
diff --git a/tests/TestCase/View/Helper/FormHelperTest.php b/tests/TestCase/View/Helper/FormHelperTest.php
index 09f3b2ebd50..ba3f88ad2d6 100644
--- a/tests/TestCase/View/Helper/FormHelperTest.php
+++ b/tests/TestCase/View/Helper/FormHelperTest.php
@@ -4274,139 +4274,17 @@ public function testRadio() {
 
 		$result = $this->Form->radio('Model.field', array('option A', 'option B'), array('name' => 'Model[custom]'));
 		$expected = array(
-			'input' => array('type' => 'hidden', 'name' => 'Model[custom]', 'value' => ''),
-			array('input' => array('type' => 'radio', 'name' => 'Model[custom]', 'value' => '0', 'id' => 'model-field-0')),
-			array('label' => array('for' => 'model-field-0')),
+			array('input' => array('type' => 'hidden', 'name' => 'Model[custom]', 'value' => '')),
+			array('input' => array('type' => 'radio', 'name' => 'Model[custom]', 'value' => '0', 'id' => 'model-custom-0')),
+			array('label' => array('for' => 'model-custom-0')),
 			'option A',
 			'/label',
-			array('input' => array('type' => 'radio', 'name' => 'Model[custom]', 'value' => '1', 'id' => 'model-field-1')),
-			array('label' => array('for' => 'model-field-1')),
+			array('input' => array('type' => 'radio', 'name' => 'Model[custom]', 'value' => '1', 'id' => 'model-custom-1')),
+			array('label' => array('for' => 'model-custom-1')),
 			'option B',
 			'/label',
 		);
 		$this->assertTags($result, $expected);
-
-		$result = $this->Form->radio(
-			'Model.field',
-			array('a>b' => 'first', 'a<b' => 'second', 'a"b' => 'third')
-		);
-		$expected = array(
-			'input' => array(
-				'type' => 'hidden', 'name' => 'data[Model][field]',
-				'value' => '',
-			),
-			array('input' => array('type' => 'radio', 'name' => 'data[Model][field]',
-				'id' => 'model-field-a-b', 'value' => 'a&gt;b')),
-			array('label' => array('for' => 'model-field-a-b')),
-			'first',
-			'/label',
-			array('input' => array('type' => 'radio', 'name' => 'data[Model][field]',
-				'id' => 'ModelFieldAB1', 'value' => 'a&lt;b')),
-			array('label' => array('for' => 'model-field-ab2')),
-			'second',
-			'/label',
-			array('input' => array('type' => 'radio', 'name' => 'data[Model][field]',
-				'id' => 'model-field-ab2', 'value' => 'a&quot;b')),
-			array('label' => array('for' => 'model-field-ab2')),
-			'third',
-			'/label',
-		);
-		$this->assertTags($result, $expected);
-	}
-
-/**
- * Test marking radio buttons as required.
- *
- * @return void
- */
-	public function testRadioRequired() {
-		$this->article['required'] = [
-			'published' => true,
-		];
-		$this->Form->create($this->article);
-
-		$result = $this->Form->radio('published', array('option A', 'optionB'));
-		$expected = array(
-			'input' => array('type' => 'hidden', 'name' => 'published', 'value' => ''),
-			array('input' => array('type' => 'radio', 'name' => 'published', 'value' => '0', 'id' => 'published-0', 'required' => 'required')),
-			'label' => array('for' => 'published-0'),
-			'option A',
-			'/label',
-			array('input' => array('type' => 'radio', 'name' => 'published', 'value' => '1', 'id' => 'published-1', 'required' => 'required')),
-			'label' => array('for' => 'published-1'),
-			'option B',
-			'/label',
-		);
-		$this->assertTags($result, $expected);
-	}
-
-/**
- * Test that radios with a 0 value are selected under the correct conditions.
- * Also ensure that values that are booleanish are handled correctly.
- *
- * @return void
- */
-	public function testRadioOptionWithBooleanishValues() {
-		$expected = array(
-			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '1', 'id' => 'model-field-1')),
-			array('label' => array('for' => 'model-field-1')),
-			'Yes',
-			'/label',
-			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '0', 'id' => 'model-field-0', 'checked' => 'checked')),
-			array('label' => array('for' => 'model-field-0')),
-			'No',
-			'/label',
-			'/fieldset'
-		);
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'), array('value' => '0'));
-		$this->assertTags($result, $expected);
-
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'), array('value' => 0));
-		$this->assertTags($result, $expected);
-
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'), array('value' => false));
-		$this->assertTags($result, $expected);
-
-		$expected = array(
-			'input' => array('type' => 'hidden', 'name' => 'Model[field]', 'value' => ''),
-			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '1', 'id' => 'model-field-1')),
-			array('label' => array('for' => 'model-field-1')),
-			'Yes',
-			'/label',
-			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '0', 'id' => 'model-field-0')),
-			array('label' => array('for' => 'ModelField0')),
-			'No',
-			'/label',
-			'/fieldset'
-		);
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'), array('value' => null));
-		$this->assertTags($result, $expected);
-
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'), array('value' => ''));
-		$this->assertTags($result, $expected);
-
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'));
-		$this->assertTags($result, $expected);
-
-		$expected = array(
-			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'checked' => 'checked', 'value' => '1', 'id' => 'model-field-1')),
-			array('label' => array('for' => 'model-field-1')),
-			'Yes',
-			'/label',
-			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '0', 'id' => 'model-field-0')),
-			array('label' => array('for' => 'model-field-0')),
-			'No',
-			'/label',
-			'/fieldset'
-		);
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'), array('value' => 1));
-		$this->assertTags($result, $expected);
-
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'), array('value' => '1'));
-		$this->assertTags($result, $expected);
-
-		$result = $this->Form->radio('Model.field', array('1' => 'Yes', '0' => 'No'), array('value' => true));
-		$this->assertTags($result, $expected);
 	}
 
 /**
diff --git a/tests/TestCase/View/Widget/RadioTest.php b/tests/TestCase/View/Widget/RadioTest.php
index 4d30235e9b6..ad17241d46a 100644
--- a/tests/TestCase/View/Widget/RadioTest.php
+++ b/tests/TestCase/View/Widget/RadioTest.php
@@ -150,15 +150,117 @@ public function testRenderIdSuffixGeneration() {
 				'type' => 'radio',
 				'name' => 'Thing[value]',
 				'value' => 'a&lt;b',
-				'id' => 'thing-value-a-b2',
+				'id' => 'thing-value-a-b1',
 			]],
-			['label' => ['for' => 'thing-value-a-b2']],
+			['label' => ['for' => 'thing-value-a-b1']],
 			'Second',
 			'/label',
 		];
 		$this->assertTags($result, $expected);
 	}
 
+/**
+ * Test rendering checks the right option with booleanish values.
+ *
+ * @return void
+ */
+	public function testRenderBooleanishValues() {
+		$label = new Label($this->templates);
+		$radio = new Radio($this->templates, $label);
+		$data = [
+			'name' => 'Model[field]',
+			'options' => ['1' => 'Yes', '0' => 'No'],
+			'val' => '0'
+		];
+		$result = $radio->render($data);
+		$expected = array(
+			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '1', 'id' => 'model-field-1')),
+			array('label' => array('for' => 'model-field-1')),
+			'Yes',
+			'/label',
+			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '0', 'id' => 'model-field-0', 'checked' => 'checked')),
+			array('label' => array('for' => 'model-field-0')),
+			'No',
+			'/label',
+		);
+		$this->assertTags($result, $expected);
+
+		$data['val'] = 0;
+		$result = $radio->render($data);
+		$this->assertTags($result, $expected);
+
+		$data['val'] = false;
+		$result = $radio->render($data);
+		$this->assertTags($result, $expected);
+
+		$expected = array(
+			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '1', 'id' => 'model-field-1')),
+			array('label' => array('for' => 'model-field-1')),
+			'Yes',
+			'/label',
+			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '0', 'id' => 'model-field-0')),
+			array('label' => array('for' => 'model-field-0')),
+			'No',
+			'/label',
+		);
+		$data['val'] = null;
+		$result = $radio->render($data);
+		$this->assertTags($result, $expected);
+
+		$data['val'] = '';
+		$result = $radio->render($data);
+		$this->assertTags($result, $expected);
+
+		$expected = array(
+			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '1', 'id' => 'model-field-1', 'checked' => 'checked')),
+			array('label' => array('for' => 'model-field-1')),
+			'Yes',
+			'/label',
+			array('input' => array('type' => 'radio', 'name' => 'Model[field]', 'value' => '0', 'id' => 'model-field-0')),
+			array('label' => array('for' => 'model-field-0')),
+			'No',
+			'/label',
+		);
+		$data['val'] = '1';
+		$result = $radio->render($data);
+		$this->assertTags($result, $expected);
+
+		$data['val'] = 1;
+		$result = $radio->render($data);
+		$this->assertTags($result, $expected);
+
+		$data['val'] = true;
+		$result = $radio->render($data);
+		$this->assertTags($result, $expected);
+	}
+
+/**
+ * Test that render() works with the required attribute.
+ *
+ * @return void
+ */
+	public function testRenderRequired() {
+		$label = new Label($this->templates);
+		$radio = new Radio($this->templates, $label);
+		$data = [
+			'name' => 'published',
+			'options' => ['option A', 'option B'],
+			'required' => true
+		];
+		$result = $radio->render($data);
+		$expected = [
+			['input' => ['type' => 'radio', 'name' => 'published', 'value' => '0', 'id' => 'published-0', 'required' => 'required']],
+			['label' => ['for' => 'published-0']],
+			'option A',
+			'/label',
+			['input' => ['type' => 'radio', 'name' => 'published', 'value' => '1', 'id' => 'published-1', 'required' => 'required']],
+			['label' => ['for' => 'published-1']],
+			'option B',
+			'/label',
+		];
+		$this->assertTags($result, $expected);
+	}
+
 /**
  * Test rendering the empty option.
  *