diff --git a/src/Forms/FieldsValidator.php b/src/Forms/FieldsValidator.php
deleted file mode 100644
index 9a49e1aa2b7..00000000000
--- a/src/Forms/FieldsValidator.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-namespace SilverStripe\Forms;
-
-use SilverStripe\Dev\Deprecation;
-use SilverStripe\Forms\Validation\Validator;
-
-/**
- * Validates the internal state of all fields in the form.
- *
- * @deprecated 5.4.0 Will be replaced with functionality inside SilverStripe\Forms\Form::validate()
- */
-class FieldsValidator extends Validator
-{
-    public function __construct()
-    {
-        Deprecation::noticeWithNoReplacment(
-            '5.4.0',
-            'Will be replaced with functionality inside SilverStripe\Forms\Form::validate()',
-            Deprecation::SCOPE_CLASS
-        );
-        parent::__construct();
-    }
-
-    public function php($data): bool
-    {
-        $fields = $this->form->Fields();
-        foreach ($fields as $field) {
-            $this->result->combineAnd($field->validate());
-        }
-        return $this->result->isValid();
-    }
-
-    public function canBeCached(): bool
-    {
-        return true;
-    }
-}
diff --git a/src/Forms/Form.php b/src/Forms/Form.php
index e2c4ed8751e..aa74dad0dfa 100644
--- a/src/Forms/Form.php
+++ b/src/Forms/Form.php
@@ -299,8 +299,10 @@ public function __construct(
         $this->setName($name);
 
         // Form validation
-        $this->validator = ($validator) ? $validator : new RequiredFieldsValidator();
-        $this->validator->setForm($this);
+        if ($validator) {
+            $this->validator = $validator;
+            $this->validator->setForm($this);
+        }
 
         // Form error controls
         $this->restoreFormState();
@@ -1264,17 +1266,23 @@ public function getLegend()
      */
     public function validationResult()
     {
+        $result = ValidationResult::create();
         // Automatically pass if there is no validator, or the clicked button is exempt
         // Note: Soft support here for validation with absent request handler
         $handler = $this->getRequestHandler();
         $action = $handler ? $handler->buttonClicked() : null;
-        $validator = $this->getValidator();
-        if (!$validator || $this->actionIsValidationExempt($action)) {
-            return ValidationResult::create();
+        if ($this->actionIsValidationExempt($action)) {
+            return $result;
+        }
+        // Invoke FormField validation
+        foreach ($this->Fields() as $field) {
+            $result->combineAnd($field->validate());
         }
-
         // Invoke validator
-        $result = $validator->validate();
+        $validator = $this->getValidator();
+        if ($validator) {
+            $result->combineAnd($validator->validate());
+        }
         $this->loadMessagesFrom($result);
         return $result;
     }
diff --git a/src/Forms/GridField/GridFieldDetailForm.php b/src/Forms/GridField/GridFieldDetailForm.php
index cff6eaddfd4..d80961e16dd 100644
--- a/src/Forms/GridField/GridFieldDetailForm.php
+++ b/src/Forms/GridField/GridFieldDetailForm.php
@@ -14,7 +14,6 @@
 use SilverStripe\Core\Extensible;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Forms\FieldList;
-use SilverStripe\Forms\FieldsValidator;
 use SilverStripe\Forms\Validation\Validator;
 use SilverStripe\ORM\DataList;
 use SilverStripe\ORM\DataObject;
@@ -147,10 +146,8 @@ public function handleItem($gridField, $request)
         if (!$this->getValidator()) {
             if ($record->hasMethod('getCMSCompositeValidator')) {
                 $validator = $record->getCMSCompositeValidator();
-            } else {
-                $validator = FieldsValidator::create();
+                $this->setValidator($validator);
             }
-            $this->setValidator($validator);
         }
 
         return $handler->handleRequest($request);
diff --git a/src/Forms/Validation/RequiredFieldsValidator.php b/src/Forms/Validation/RequiredFieldsValidator.php
index 0ff690f3dbe..aeadf8974b9 100644
--- a/src/Forms/Validation/RequiredFieldsValidator.php
+++ b/src/Forms/Validation/RequiredFieldsValidator.php
@@ -116,12 +116,6 @@ public function php($data)
         $valid = true;
         $fields = $this->form->Fields();
 
-        foreach ($fields as $field) {
-            $result = $field->validate();
-            $valid = $result->isValid() && $valid;
-            $this->result->combineAnd($result);
-        }
-
         if (!$this->required) {
             return $valid;
         }
diff --git a/src/ORM/DataObject.php b/src/ORM/DataObject.php
index f0d735e51e3..8cbf4f9575d 100644
--- a/src/ORM/DataObject.php
+++ b/src/ORM/DataObject.php
@@ -19,7 +19,6 @@
 use SilverStripe\Forms\FormField;
 use SilverStripe\Forms\FormScaffolder;
 use SilverStripe\Forms\Validation\CompositeValidator;
-use SilverStripe\Forms\FieldsValidator;
 use SilverStripe\Forms\GridField\GridField;
 use SilverStripe\Forms\GridField\GridFieldConfig_RelationEditor;
 use SilverStripe\Forms\HiddenField;
@@ -2686,7 +2685,7 @@ public function getCMSActions()
      */
     public function getCMSCompositeValidator(): CompositeValidator
     {
-        $compositeValidator = CompositeValidator::create([FieldsValidator::create()]);
+        $compositeValidator = CompositeValidator::create();
 
         // Support for the old method during the deprecation period
         if ($this->hasMethod('getCMSValidator')) {
diff --git a/tests/php/Forms/EmailFieldTest.php b/tests/php/Forms/EmailFieldTest.php
index d46ceae1214..9c5064812dd 100644
--- a/tests/php/Forms/EmailFieldTest.php
+++ b/tests/php/Forms/EmailFieldTest.php
@@ -4,7 +4,6 @@
 
 use SilverStripe\Dev\FunctionalTest;
 use SilverStripe\Forms\EmailField;
-use SilverStripe\Forms\FieldsValidator;
 
 class EmailFieldTest extends FunctionalTest
 {
diff --git a/tests/php/Forms/FieldsValidatorTest.php b/tests/php/Forms/FieldsValidatorTest.php
deleted file mode 100644
index d5eac24d9c4..00000000000
--- a/tests/php/Forms/FieldsValidatorTest.php
+++ /dev/null
@@ -1,78 +0,0 @@
-<?php
-
-namespace SilverStripe\Forms\Tests;
-
-use SilverStripe\Dev\SapphireTest;
-use SilverStripe\Forms\EmailField;
-use SilverStripe\Forms\FieldList;
-use SilverStripe\Forms\FieldsValidator;
-use SilverStripe\Forms\Form;
-use PHPUnit\Framework\Attributes\DataProvider;
-
-class FieldsValidatorTest extends SapphireTest
-{
-    protected $usesDatabase = false;
-
-    public static function provideValidation()
-    {
-        return [
-            'missing values arent invalid' => [
-                'values' => [],
-                'isValid' => true,
-            ],
-            'empty values arent invalid' => [
-                'values' => [
-                    'EmailField1' => '',
-                    'EmailField2' => null,
-                ],
-                'isValid' => true,
-            ],
-            'any invalid is invalid' => [
-                'values' => [
-                    'EmailField1' => 'email@example.com',
-                    'EmailField2' => 'not email',
-                ],
-                'isValid' => false,
-            ],
-            'all invalid is invalid' => [
-                'values' => [
-                    'EmailField1' => 'not email',
-                    'EmailField2' => 'not email',
-                ],
-                'isValid' => false,
-            ],
-            'all valid is valid' => [
-                'values' => [
-                    'EmailField1' => 'email@example.com',
-                    'EmailField2' => 'email@example.com',
-                ],
-                'isValid' => true,
-            ],
-        ];
-    }
-
-    #[DataProvider('provideValidation')]
-    public function testValidation(array $values, bool $isValid)
-    {
-        $fieldList = new FieldList([
-            $field1 = new EmailField('EmailField1'),
-            $field2 = new EmailField('EmailField2'),
-        ]);
-        if (array_key_exists('EmailField1', $values)) {
-            $field1->setValue($values['EmailField1']);
-        }
-        if (array_key_exists('EmailField2', $values)) {
-            $field2->setValue($values['EmailField2']);
-        }
-        $form = new Form(null, 'testForm', $fieldList, new FieldList([/* no actions */]), new FieldsValidator());
-
-        $result = $form->validationResult();
-        $this->assertSame($isValid, $result->isValid());
-        $messages = $result->getMessages();
-        if ($isValid) {
-            $this->assertEmpty($messages);
-        } else {
-            $this->assertNotEmpty($messages);
-        }
-    }
-}
diff --git a/tests/php/Forms/FormFieldTest.php b/tests/php/Forms/FormFieldTest.php
index ba8438c3ffc..4ccc0039400 100644
--- a/tests/php/Forms/FormFieldTest.php
+++ b/tests/php/Forms/FormFieldTest.php
@@ -41,7 +41,6 @@
 use PHPUnit\Framework\Attributes\DataProvider;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Forms\ConfirmedPasswordField;
-use SilverStripe\Forms\FieldsValidator;
 use SilverStripe\Forms\NumericField;
 use SilverStripe\Forms\CheckboxField_Readonly;
 use SilverStripe\VersionedAdmin\Forms\DiffField;
@@ -548,7 +547,7 @@ public function testValidationExtensionHooks()
         /** @var TextField|FieldValidationExtension $field */
         $field = new TextField('Test');
         $field->setMaxLength(5);
-        $form = new Form(null, 'test', new FieldList($field), new FieldList(), new FieldsValidator());
+        $form = new Form(null, 'test', new FieldList($field), new FieldList());
         $form->disableSecurityToken();
 
         $field->setValue('IAmLongerThan5Characters');
diff --git a/tests/php/Forms/FormTest.php b/tests/php/Forms/FormTest.php
index 30816b0feb9..7e30a1b5fe3 100644
--- a/tests/php/Forms/FormTest.php
+++ b/tests/php/Forms/FormTest.php
@@ -34,6 +34,7 @@
 use SilverStripe\Model\ArrayData;
 use SilverStripe\View\SSViewer;
 use PHPUnit\Framework\Attributes\DataProvider;
+use SilverStripe\Forms\EmailField;
 
 class FormTest extends FunctionalTest
 {
@@ -1309,4 +1310,67 @@ protected function clean($input)
             trim($input ?? '')
         );
     }
+
+    public static function provideValidateFormFields()
+    {
+        return [
+            'missing values arent invalid' => [
+                'values' => [],
+                'isValid' => true,
+            ],
+            'empty values arent invalid' => [
+                'values' => [
+                    'EmailField1' => '',
+                    'EmailField2' => null,
+                ],
+                'isValid' => true,
+            ],
+            'any invalid is invalid' => [
+                'values' => [
+                    'EmailField1' => 'email@example.com',
+                    'EmailField2' => 'not email',
+                ],
+                'isValid' => false,
+            ],
+            'all invalid is invalid' => [
+                'values' => [
+                    'EmailField1' => 'not email',
+                    'EmailField2' => 'not email',
+                ],
+                'isValid' => false,
+            ],
+            'all valid is valid' => [
+                'values' => [
+                    'EmailField1' => 'email@example.com',
+                    'EmailField2' => 'email@example.com',
+                ],
+                'isValid' => true,
+            ],
+        ];
+    }
+
+    #[DataProvider('provideValidateFormFields')]
+    public function testValidateFormFields(array $values, bool $isValid)
+    {
+        $fieldList = new FieldList([
+            $field1 = new EmailField('EmailField1'),
+            $field2 = new EmailField('EmailField2'),
+        ]);
+        if (array_key_exists('EmailField1', $values)) {
+            $field1->setValue($values['EmailField1']);
+        }
+        if (array_key_exists('EmailField2', $values)) {
+            $field2->setValue($values['EmailField2']);
+        }
+        $form = new Form(null, 'testForm', $fieldList, new FieldList([/* no actions */]));
+
+        $result = $form->validationResult();
+        $this->assertSame($isValid, $result->isValid());
+        $messages = $result->getMessages();
+        if ($isValid) {
+            $this->assertEmpty($messages);
+        } else {
+            $this->assertNotEmpty($messages);
+        }
+    }
 }
diff --git a/tests/php/Forms/GridField/GridFieldTest.php b/tests/php/Forms/GridField/GridFieldTest.php
index 7dc479356e1..8847ee255f8 100644
--- a/tests/php/Forms/GridField/GridFieldTest.php
+++ b/tests/php/Forms/GridField/GridFieldTest.php
@@ -551,7 +551,7 @@ public function testValidationMessageInOutput()
         $gridField->setMessage(null);
 
         // A form that passes validation should not display a validation error in the FieldHolder output.
-        $form->setValidator(new RequiredFieldsValidator());
+        $form->setValidator(null);
         $form->validationResult();
         $gridfieldOutput = $gridField->FieldHolder();
         $this->assertStringNotContainsString('<p class="message ' . ValidationResult::TYPE_ERROR . '">', $gridfieldOutput);