diff --git a/admin/code/LeftAndMain.php b/admin/code/LeftAndMain.php
index 83f417bef..3016a73e0 100644
--- a/admin/code/LeftAndMain.php
+++ b/admin/code/LeftAndMain.php
@@ -231,13 +231,8 @@ class LeftAndMain extends Controller implements PermissionProvider {
 				$validHeaderValues = ['schema', 'state'];
 				return in_array(trim($value), $validHeaderValues);
 			});
-		}
-
-		if (!count($schemaParts)) {
-			throw new SS_HTTPResponse_Exception(
-				'Invalid request. Check you\'ve set a "X-Formschema-Request" header with "schema" or "state" values.',
-				400
-			);
+		} else {
+			$schemaParts = ['schema'];
 		}
 
 		$return = ['id' => $form->getName()];
diff --git a/forms/CheckboxField.php b/forms/CheckboxField.php
index e88f7ca3c..b2a2895ac 100644
--- a/forms/CheckboxField.php
+++ b/forms/CheckboxField.php
@@ -7,6 +7,8 @@
  */
 class CheckboxField extends FormField {
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_SINGLESELECT;
+
 	public function setValue($value) {
 		$this->value = ($value) ? 1 : 0;
 		return $this;
diff --git a/forms/CheckboxSetField.php b/forms/CheckboxSetField.php
index 6379c749d..898ffcd9c 100644
--- a/forms/CheckboxSetField.php
+++ b/forms/CheckboxSetField.php
@@ -38,6 +38,8 @@
  */
 class CheckboxSetField extends MultiSelectField {
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_MULTISELECT;
+
 	/**
 	 * @todo Explain different source data that can be used with this field,
 	 * e.g. SQLMap, ArrayList or an array.
diff --git a/forms/CompositeField.php b/forms/CompositeField.php
index f137b25e1..7aa7b3ac2 100644
--- a/forms/CompositeField.php
+++ b/forms/CompositeField.php
@@ -43,6 +43,8 @@ class CompositeField extends FormField {
 	 */
 	protected $legend;
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_STRUCTURAL;
+
 	public function __construct($children = null) {
 		if($children instanceof FieldList) {
 			$this->children = $children;
@@ -394,4 +396,3 @@ class CompositeField extends FormField {
 	}
 
 }
-
diff --git a/forms/ConfirmedPasswordField.php b/forms/ConfirmedPasswordField.php
index ce426708d..e5e32fc47 100644
--- a/forms/ConfirmedPasswordField.php
+++ b/forms/ConfirmedPasswordField.php
@@ -75,6 +75,8 @@ class ConfirmedPasswordField extends FormField {
 	 */
 	public $children;
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_STRUCTURAL;
+
 	/**
 	 * @param string $name
 	 * @param string $title
diff --git a/forms/CountryDropdownField.php b/forms/CountryDropdownField.php
index e68dd063d..b8ca28af3 100644
--- a/forms/CountryDropdownField.php
+++ b/forms/CountryDropdownField.php
@@ -28,6 +28,8 @@ class CountryDropdownField extends DropdownField {
 
 	protected $extraClasses = array('dropdown');
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_SINGLESELECT;
+
 	/**
 	 * Get the locale of the Member, or if we're not logged in or don't have a locale, use the default one
 	 * @return string
diff --git a/forms/CurrencyField.php b/forms/CurrencyField.php
index 96a8842be..baef6c8bd 100644
--- a/forms/CurrencyField.php
+++ b/forms/CurrencyField.php
@@ -112,4 +112,3 @@ class CurrencyField_Disabled extends CurrencyField{
 			. " name=\"".$this->name."\" value=\"".$valforInput."\" />";
 	}
 }
-
diff --git a/forms/DateField.php b/forms/DateField.php
index 90065b7d7..ab6874581 100644
--- a/forms/DateField.php
+++ b/forms/DateField.php
@@ -60,6 +60,8 @@ require_once 'Zend/Date.php';
  */
 class DateField extends TextField {
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_DATE;
+
 	/**
 	 * @config
 	 * @var array
@@ -677,4 +679,3 @@ class DateField_View_JQuery extends Object {
 		return preg_replace($patterns, $replacements, $format);
 	}
 }
-
diff --git a/forms/DatetimeField.php b/forms/DatetimeField.php
index e57847ef7..e34ac4f6a 100644
--- a/forms/DatetimeField.php
+++ b/forms/DatetimeField.php
@@ -44,6 +44,8 @@ class DatetimeField extends FormField {
 	 */
 	protected $timeField = null;
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_DATETIME;
+
 	/**
 	 * @config
 	 * @var array
diff --git a/forms/FormField.php b/forms/FormField.php
index e324ff78a..982274537 100644
--- a/forms/FormField.php
+++ b/forms/FormField.php
@@ -20,12 +20,56 @@
  * For example, data might be saved to the filesystem instead of the data record, or saved to a
  * component of the data record instead of the data record itself.
  *
+ * A form field can be represented as structured data through {@link FormSchema},
+ * including both structure (name, id, attributes, etc.) and state (field value).
+ * Can be used by for JSON data which is consumed by a front-end application.
+ *
  * @package forms
  * @subpackage core
  */
 class FormField extends RequestHandler {
 
-	use SilverStripe\Forms\Schema\FormFieldSchemaTrait;
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_STRING = 'String';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_HIDDEN = 'Hidden';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_TEXT = 'Text';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_HTML = 'HTML';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_INTEGER = 'Integer';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_DECIMAL = 'Decimal';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_MULTISELECT = 'MultiSelect';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_SINGLESELECT = 'SingleSelect';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_DATE = 'Date';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_DATETIME = 'DateTime';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_TIME = 'Time';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_BOOLEAN = 'Boolean';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_CUSTOM = 'Custom';
+
+	/** @see $schemaDataType */
+	const SCHEMA_DATA_TYPE_STRUCTURAL = 'Structural';
 
 	/**
 	 * @var Form
@@ -166,6 +210,59 @@ class FormField extends RequestHandler {
 	 */
 	protected $attributes = [];
 
+	/**
+	 * The data type backing the field. Represents the type of value the
+	 * form expects to receive via a postback. Should be set in subclasses.
+	 *
+	 * The values allowed in this list include:
+	 *
+	 *   - String: Single line text
+	 *   - Hidden: Hidden field which is posted back without modification
+	 *   - Text: Multi line text
+	 *   - HTML: Rich html text
+	 *   - Integer: Whole number value
+	 *   - Decimal: Decimal value
+	 *   - MultiSelect: Select many from source
+	 *   - SingleSelect: Select one from source
+	 *   - Date: Date only
+	 *   - DateTime: Date and time
+	 *   - Time: Time only
+	 *   - Boolean: Yes or no
+	 *   - Custom: Custom type declared by the front-end component. For fields with this type,
+	 *     the component property is mandatory, and will determine the posted value for this field.
+	 *   - Structural: Represents a field that is NOT posted back. This may contain other fields,
+	 *     or simply be a block of stand-alone content. As with 'Custom',
+	 *     the component property is mandatory if this is assigned.
+	 *
+	 * Each value has an equivalent constant, e.g. {@link self::SCHEMA_DATA_TYPE_STRING}.
+	 *
+	 * @var string
+	 */
+	 protected $schemaDataType;
+
+	/**
+	 * The type of front-end component to render the FormField as.
+	 *
+	 * @var string
+	 */
+	protected $schemaComponent;
+
+	/**
+	 * Structured schema data representing the FormField.
+	 * Used to render the FormField as a ReactJS Component on the front-end.
+	 *
+	 * @var array
+	 */
+	protected $schemaData = [];
+
+	/**
+	 * Structured schema state representing the FormField's current data and validation.
+	 * Used to render the FormField as a ReactJS Component on the front-end.
+	 *
+	 * @var array
+	 */
+	protected $schemaState = [];
+
 	/**
 	 * Takes a field name and converts camelcase to spaced words. Also resolves combined field
 	 * names with dot syntax to spaced words.
@@ -1290,4 +1387,147 @@ class FormField extends RequestHandler {
 		return $this->dontEscape;
 	}
 
+	/**
+	 * Sets the component type the FormField will be rendered as on the front-end.
+	 *
+	 * @param string $componentType
+	 * @return FormField
+	 */
+	public function setSchemaComponent($componentType) {
+		$this->schemaComponent = $componentType;
+		return $this;
+	}
+
+	/**
+	 * Gets the type of front-end component the FormField will be rendered as.
+	 *
+	 * @return string
+	 */
+	public function getSchemaComponent() {
+		return $this->schemaComponent;
+	}
+
+	/**
+	 * Sets the schema data used for rendering the field on the front-end.
+	 * Merges the passed array with the current `$schemaData` or {@link getSchemaDataDefaults()}.
+	 * Any passed keys that are not defined in {@link getSchemaDataDefaults()} are ignored.
+	 * If you want to pass around ad hoc data use the `data` array e.g. pass `['data' => ['myCustomKey' => 'yolo']]`.
+	 *
+	 * @param array $schemaData - The data to be merged with $this->schemaData.
+	 * @return FormField
+	 *
+	 * @todo Add deep merging of arrays like `data` and `attributes`.
+	 */
+	public function setSchemaData($schemaData = []) {
+		$current = $this->getSchemaData();
+
+		$this->schemaData = array_merge($current, array_intersect_key($schemaData, $current));
+		return $this;
+	}
+
+	/**
+	 * Gets the schema data used to render the FormField on the front-end.
+	 *
+	 * @return array
+	 */
+	public function getSchemaData() {
+		return array_merge($this->getSchemaDataDefaults(), $this->schemaData);
+	}
+
+	/**
+	 * @todo Throw exception if value is missing, once a form field schema is mandatory across the CMS
+	 *
+	 * @return string
+	 */
+	public function getSchemaDataType() {
+		return $this->schemaDataType;
+	}
+
+	/**
+	 * Gets the defaults for $schemaData.
+	 * The keys defined here are immutable, meaning undefined keys passed to {@link setSchemaData()} are ignored.
+	 * Instead the `data` array should be used to pass around ad hoc data.
+	 *
+	 * @return array
+	 */
+	public function getSchemaDataDefaults() {
+		return [
+			'name' => $this->getName(),
+			'id' => $this->ID(),
+			'type' => $this->getSchemaDataType(),
+			'component' => $this->getSchemaComponent(),
+			'holder_id' => null,
+			'title' => $this->Title(),
+			'source' => null,
+			'extraClass' => $this->ExtraClass(),
+			'description' => $this->getDescription(),
+			'rightTitle' => $this->RightTitle(),
+			'leftTitle' => $this->LeftTitle(),
+			'readOnly' => $this->isReadOnly(),
+			'disabled' => $this->isDisabled(),
+			'customValidationMessage' => $this->getCustomValidationMessage(),
+			'attributes' => [],
+			'data' => [],
+		];
+	}
+
+	/**
+	 * Sets the schema data used for rendering the field on the front-end.
+	 * Merges the passed array with the current `$schemaData` or {@link getSchemaDataDefaults()}.
+	 * Any passed keys that are not defined in {@link getSchemaDataDefaults()} are ignored.
+	 * If you want to pass around ad hoc data use the `data` array e.g. pass `['data' => ['myCustomKey' => 'yolo']]`.
+	 *
+	 * @param array $schemaData - The data to be merged with $this->schemaData.
+	 * @return FormField
+	 *
+	 * @todo Add deep merging of arrays like `data` and `attributes`.
+	 */
+	public function setSchemaState($schemaState = []) {
+		$current = $this->getSchemaState();
+
+		$this->schemaState = array_merge($current, array_intersect_key($schemaState, $current));
+		return $this;
+	}
+
+	/**
+	 * Gets the schema state used to render the FormField on the front-end.
+	 *
+	 * @return array
+	 */
+	public function getSchemaState() {
+		return array_merge($this->getSchemaStateDefaults(), $this->schemaState);
+	}
+
+	/**
+	 * Gets the defaults for $schemaState.
+	 * The keys defined here are immutable, meaning undefined keys passed to {@link setSchemaState()} are ignored.
+	 * Instead the `data` array should be used to pass around ad hoc data.
+	 * Includes validation data if the field is associated to a {@link Form},
+	 * and {@link Form->validate()} has been called.
+	 *
+	 * @return array
+	 */
+	public function getSchemaStateDefaults() {
+		$field = $this;
+		$form = $this->getForm();
+		$validator = $form ? $form->getValidator() : null;
+		$errors = $validator ? (array)$validator->getErrors() : [];
+		$messages = array_filter(array_map(function($error) use ($field) {
+			if($error['fieldName'] === $field->getName()) {
+				return [
+					'value' => $error['message'],
+					'type' => $error['messageType']
+				];
+			}
+		}, $errors));
+
+		return [
+			'id' => $this->ID(),
+			'value' => $this->Value(),
+			'valid' => (count($messages) === 0),
+			'messages' => (array)$messages,
+			'data' => [],
+		];
+	}
+
 }
diff --git a/forms/FormFieldSchemaTrait.php b/forms/FormFieldSchemaTrait.php
deleted file mode 100644
index f4b3e09d9..000000000
--- a/forms/FormFieldSchemaTrait.php
+++ /dev/null
@@ -1,174 +0,0 @@
-<?php
-
-namespace SilverStripe\Forms\Schema;
-
-/**
- * Class FormFieldSchemaTrait
- * @package SilverStripe\Forms\Schema
- *
- * Allows {@link FormField} to be represented as structured data,
- * including both structure (name, id, attributes, etc.) and state (field value).
- * Can be used by {@link FormSchema} to represent a form in JSON,
- * to be consumed by a front-end application.
- *
- * WARNING: Experimental API.
- */
-trait FormFieldSchemaTrait {
-
-	/**
-	 * The type of front-end component to render the FormField as.
-	 *
-	 * @var string
-	 */
-	protected $schemaComponent;
-
-	/**
-	 * Structured schema data representing the FormField.
-	 * Used to render the FormField as a ReactJS Component on the front-end.
-	 *
-	 * @var array
-	 */
-	protected $schemaData = [];
-
-	/**
-	 * Structured schema state representing the FormField's current data and validation.
-	 * Used to render the FormField as a ReactJS Component on the front-end.
-	 *
-	 * @var array
-	 */
-	protected $schemaState = [];
-
-	/**
-	 * Sets the component type the FormField will be rendered as on the front-end.
-	 *
-	 * @param string $componentType
-	 * @return FormField
-	 */
-	public function setSchemaComponent($componentType) {
-		$this->schemaComponent = $componentType;
-		return $this;
-	}
-
-	/**
-	 * Gets the type of front-end component the FormField will be rendered as.
-	 *
-	 * @return string
-	 */
-	public function getSchemaComponent() {
-		return $this->schemaComponent;
-	}
-
-	/**
-	 * Sets the schema data used for rendering the field on the front-end.
-	 * Merges the passed array with the current `$schemaData` or {@link getSchemaDataDefaults()}.
-	 * Any passed keys that are not defined in {@link getSchemaDataDefaults()} are ignored.
-	 * If you want to pass around ad hoc data use the `data` array e.g. pass `['data' => ['myCustomKey' => 'yolo']]`.
-	 *
-	 * @param array $schemaData - The data to be merged with $this->schemaData.
-	 * @return FormField
-	 *
-	 * @todo Add deep merging of arrays like `data` and `attributes`.
-	 */
-	public function setSchemaData($schemaData = []) {
-		$current = $this->getSchemaData();
-
-		$this->schemaData = array_merge($current, array_intersect_key($schemaData, $current));
-		return $this;
-	}
-
-	/**
-	 * Gets the schema data used to render the FormField on the front-end.
-	 *
-	 * @return array
-	 */
-	public function getSchemaData() {
-		return array_merge($this->getSchemaDataDefaults(), $this->schemaData);
-	}
-
-	/**
-	 * Gets the defaults for $schemaData.
-	 * The keys defined here are immutable, meaning undefined keys passed to {@link setSchemaData()} are ignored.
-	 * Instead the `data` array should be used to pass around ad hoc data.
-	 *
-	 * @return array
-	 */
-	public function getSchemaDataDefaults() {
-		return [
-			'type' => $this->class,
-			'component' => $this->getSchemaComponent(),
-			'id' => $this->ID,
-			'holder_id' => null,
-			'name' => $this->getName(),
-			'title' => $this->Title(),
-			'source' => null,
-			'extraClass' => $this->ExtraClass(),
-			'description' => $this->getDescription(),
-			'rightTitle' => $this->RightTitle(),
-			'leftTitle' => $this->LeftTitle(),
-			'readOnly' => $this->isReadOnly(),
-			'disabled' => $this->isDisabled(),
-			'customValidationMessage' => $this->getCustomValidationMessage(),
-			'attributes' => [],
-			'data' => [],
-		];
-	}
-
-	/**
-	 * Sets the schema data used for rendering the field on the front-end.
-	 * Merges the passed array with the current `$schemaData` or {@link getSchemaDataDefaults()}.
-	 * Any passed keys that are not defined in {@link getSchemaDataDefaults()} are ignored.
-	 * If you want to pass around ad hoc data use the `data` array e.g. pass `['data' => ['myCustomKey' => 'yolo']]`.
-	 *
-	 * @param array $schemaData - The data to be merged with $this->schemaData.
-	 * @return FormField
-	 *
-	 * @todo Add deep merging of arrays like `data` and `attributes`.
-	 */
-	public function setSchemaState($schemaState = []) {
-		$current = $this->getSchemaState();
-
-		$this->schemaState = array_merge($current, array_intersect_key($schemaState, $current));
-		return $this;
-	}
-
-	/**
-	 * Gets the schema state used to render the FormField on the front-end.
-	 *
-	 * @return array
-	 */
-	public function getSchemaState() {
-		return array_merge($this->getSchemaStateDefaults(), $this->schemaState);
-	}
-
-	/**
-	 * Gets the defaults for $schemaState.
-	 * The keys defined here are immutable, meaning undefined keys passed to {@link setSchemaState()} are ignored.
-	 * Instead the `data` array should be used to pass around ad hoc data.
-	 * Includes validation data if the field is associated to a {@link Form},
-	 * and {@link Form->validate()} has been called.
-	 *
-	 * @return array
-	 */
-	public function getSchemaStateDefaults() {
-		$field = $this;
-		$form = $this->getForm();
-		$validator = $form ? $form->getValidator() : null;
-		$errors = $validator ? (array)$validator->getErrors() : [];
-		$messages = array_filter(array_map(function($error) use ($field) {
-			if($error['fieldName'] === $field->getName()) {
-				return [
-					'value' => $error['message'],
-					'type' => $error['messageType']
-				];
-			}
-		}, $errors));
-
-		return [
-			'id' => $this->ID(),
-			'value' => $this->Value(),
-			'valid' => (count($messages) === 0),
-			'messages' => (array)$messages,
-			'data' => [],
-		];
-	}
-}
diff --git a/forms/FormSchema.php b/forms/FormSchema.php
index 9f2c00dcf..06c91f207 100644
--- a/forms/FormSchema.php
+++ b/forms/FormSchema.php
@@ -41,10 +41,9 @@ class FormSchema {
 			$schema['actions'][] = $action->getSchemaData();
 		}
 
-		foreach ($form->Fields() as $fieldList) {
-			foreach ($fieldList->getForm()->fields()->dataFields() as $field) {
-				$schema['fields'][] = $field->getSchemaData();
-			}
+		// TODO Implemented nested fields and use Fields() instead
+		foreach ($form->Fields()->dataFields() as $field) {
+			$schema['fields'][] = $field->getSchemaData();
 		}
 
 		return $schema;
diff --git a/forms/HiddenField.php b/forms/HiddenField.php
index 052d97d5d..d03f76b18 100644
--- a/forms/HiddenField.php
+++ b/forms/HiddenField.php
@@ -7,6 +7,9 @@
  * @subpackage fields-dataless
  */
 class HiddenField extends FormField {
+
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_HIDDEN;
+
 	/**
 	 * @param array $properties
 	 *
diff --git a/forms/MoneyField.php b/forms/MoneyField.php
index d8c4f15fa..5d5161a88 100644
--- a/forms/MoneyField.php
+++ b/forms/MoneyField.php
@@ -15,6 +15,8 @@ use SilverStripe\Model\FieldType\DBMoney;
  */
 class MoneyField extends FormField {
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_TEXT;
+
 	/**
 	 * @var string $_locale
 	 */
diff --git a/forms/MultiSelectField.php b/forms/MultiSelectField.php
index be1354088..15ba9f16d 100644
--- a/forms/MultiSelectField.php
+++ b/forms/MultiSelectField.php
@@ -15,6 +15,8 @@ abstract class MultiSelectField extends SelectField {
 	 */
 	protected $defaultItems = array();
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_MULTISELECT;
+
 	/**
 	 * Extracts the value of this field, normalised as an array.
 	 * Scalar values will return a single length array, even if empty
diff --git a/forms/NumericField.php b/forms/NumericField.php
index 6a40c2778..39616cb4c 100644
--- a/forms/NumericField.php
+++ b/forms/NumericField.php
@@ -9,6 +9,9 @@
  * @subpackage fields-formattedinput
  */
 class NumericField extends TextField {
+
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_DECIMAL;
+
 	/**
 	 * Override locale for this field.
 	 *
diff --git a/forms/SingleSelectField.php b/forms/SingleSelectField.php
index 186e006bf..567688fda 100644
--- a/forms/SingleSelectField.php
+++ b/forms/SingleSelectField.php
@@ -23,6 +23,8 @@ abstract class SingleSelectField extends SelectField {
 	 */
 	protected $emptyString = '';
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_SINGLESELECT;
+
 	/**
 	 * @param boolean $bool
 	 * @return self Self reference
diff --git a/forms/Tab.php b/forms/Tab.php
index 3773528d2..14d53b5e1 100644
--- a/forms/Tab.php
+++ b/forms/Tab.php
@@ -82,4 +82,3 @@ class Tab extends CompositeField {
 		);
 	}
 }
-
diff --git a/forms/TextField.php b/forms/TextField.php
index f374500f8..e14ef47ef 100644
--- a/forms/TextField.php
+++ b/forms/TextField.php
@@ -12,6 +12,8 @@ class TextField extends FormField {
 	 */
 	protected $maxLength;
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_TEXT;
+
 	/**
 	 * Returns an input field.
 	 *
diff --git a/forms/TimeField.php b/forms/TimeField.php
index 0dc023274..6dc7c754e 100644
--- a/forms/TimeField.php
+++ b/forms/TimeField.php
@@ -50,6 +50,8 @@ class TimeField extends TextField {
 	 */
 	protected $valueObj = null;
 
+	protected $schemaDataType = FormField::SCHEMA_DATA_TYPE_TIME;
+
 	public function __construct($name, $title = null, $value = ""){
 		if(!$this->locale) {
 			$this->locale = i18n::get_locale();
diff --git a/tests/forms/FormSchemaTest.php b/tests/forms/FormSchemaTest.php
index 4cf1d5564..8b586efe6 100644
--- a/tests/forms/FormSchemaTest.php
+++ b/tests/forms/FormSchemaTest.php
@@ -24,11 +24,11 @@ class FormSchemaTest extends SapphireTest {
 			'data' => [],
 			'fields' => [
 				[
-					'type' => "HiddenField",
-					'component' => null,
-					'id' => null,
-					'holder_id' => null,
+					'id' => 'Form_TestForm_SecurityID',
 					'name' => 'SecurityID',
+					'type' => "Hidden",
+					'component' => null,
+					'holder_id' => null,
 					'title' => 'Security ID',
 					'source' => null,
 					'extraClass' => 'hidden',