diff --git a/AbstractRendererEngine.php b/AbstractRendererEngine.php
index 370f74e3..905c98bb 100644
--- a/AbstractRendererEngine.php
+++ b/AbstractRendererEngine.php
@@ -21,7 +21,7 @@ abstract class AbstractRendererEngine implements FormRendererEngineInterface
     /**
      * The variable in {@link FormView} used as cache key.
      */
-    const CACHE_KEY_VAR = 'cache_key';
+    public const CACHE_KEY_VAR = 'cache_key';
 
     protected $defaultThemes;
     protected $themes = [];
diff --git a/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php b/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php
index 4e463c17..dddd074a 100644
--- a/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php
+++ b/Extension/Core/DataTransformer/DateIntervalToArrayTransformer.php
@@ -22,13 +22,13 @@ use Symfony\Component\Form\Exception\UnexpectedTypeException;
  */
 class DateIntervalToArrayTransformer implements DataTransformerInterface
 {
-    const YEARS = 'years';
-    const MONTHS = 'months';
-    const DAYS = 'days';
-    const HOURS = 'hours';
-    const MINUTES = 'minutes';
-    const SECONDS = 'seconds';
-    const INVERT = 'invert';
+    public const YEARS = 'years';
+    public const MONTHS = 'months';
+    public const DAYS = 'days';
+    public const HOURS = 'hours';
+    public const MINUTES = 'minutes';
+    public const SECONDS = 'seconds';
+    public const INVERT = 'invert';
 
     private static $availableFields = [
         self::YEARS => 'y',
diff --git a/Extension/Core/DataTransformer/DateTimeToHtml5LocalDateTimeTransformer.php b/Extension/Core/DataTransformer/DateTimeToHtml5LocalDateTimeTransformer.php
index f7f113b9..ec323179 100644
--- a/Extension/Core/DataTransformer/DateTimeToHtml5LocalDateTimeTransformer.php
+++ b/Extension/Core/DataTransformer/DateTimeToHtml5LocalDateTimeTransformer.php
@@ -20,7 +20,7 @@ use Symfony\Component\Form\Exception\TransformationFailedException;
  */
 class DateTimeToHtml5LocalDateTimeTransformer extends BaseDateTimeTransformer
 {
-    const HTML5_FORMAT = 'Y-m-d\\TH:i:s';
+    public const HTML5_FORMAT = 'Y-m-d\\TH:i:s';
 
     /**
      * Transforms a \DateTime into a local date and time string.
diff --git a/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php b/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
index 6ed37e71..6fff3269 100644
--- a/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
+++ b/Extension/Core/DataTransformer/NumberToLocalizedStringTransformer.php
@@ -26,37 +26,37 @@ class NumberToLocalizedStringTransformer implements DataTransformerInterface
     /**
      * @deprecated since Symfony 5.1, use \NumberFormatter::ROUND_CEILING instead.
      */
-    const ROUND_CEILING = \NumberFormatter::ROUND_CEILING;
+    public const ROUND_CEILING = \NumberFormatter::ROUND_CEILING;
 
     /**
      * @deprecated since Symfony 5.1, use \NumberFormatter::ROUND_FLOOR instead.
      */
-    const ROUND_FLOOR = \NumberFormatter::ROUND_FLOOR;
+    public const ROUND_FLOOR = \NumberFormatter::ROUND_FLOOR;
 
     /**
      * @deprecated since Symfony 5.1, use \NumberFormatter::ROUND_UP instead.
      */
-    const ROUND_UP = \NumberFormatter::ROUND_UP;
+    public const ROUND_UP = \NumberFormatter::ROUND_UP;
 
     /**
      * @deprecated since Symfony 5.1, use \NumberFormatter::ROUND_DOWN instead.
      */
-    const ROUND_DOWN = \NumberFormatter::ROUND_DOWN;
+    public const ROUND_DOWN = \NumberFormatter::ROUND_DOWN;
 
     /**
      * @deprecated since Symfony 5.1, use \NumberFormatter::ROUND_HALFEVEN instead.
      */
-    const ROUND_HALF_EVEN = \NumberFormatter::ROUND_HALFEVEN;
+    public const ROUND_HALF_EVEN = \NumberFormatter::ROUND_HALFEVEN;
 
     /**
      * @deprecated since Symfony 5.1, use \NumberFormatter::ROUND_HALFUP instead.
      */
-    const ROUND_HALF_UP = \NumberFormatter::ROUND_HALFUP;
+    public const ROUND_HALF_UP = \NumberFormatter::ROUND_HALFUP;
 
     /**
      * @deprecated since Symfony 5.1, use \NumberFormatter::ROUND_HALFDOWN instead.
      */
-    const ROUND_HALF_DOWN = \NumberFormatter::ROUND_HALFDOWN;
+    public const ROUND_HALF_DOWN = \NumberFormatter::ROUND_HALFDOWN;
 
     protected $grouping;
 
diff --git a/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php b/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
index 9e640919..5573572d 100644
--- a/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
+++ b/Extension/Core/DataTransformer/PercentToLocalizedStringTransformer.php
@@ -23,8 +23,8 @@ use Symfony\Component\Form\Exception\UnexpectedTypeException;
  */
 class PercentToLocalizedStringTransformer implements DataTransformerInterface
 {
-    const FRACTIONAL = 'fractional';
-    const INTEGER = 'integer';
+    public const FRACTIONAL = 'fractional';
+    public const INTEGER = 'integer';
 
     protected static $types = [
         self::FRACTIONAL,
diff --git a/Extension/Core/Type/DateTimeType.php b/Extension/Core/Type/DateTimeType.php
index 14eb4bd6..fa1e8de8 100644
--- a/Extension/Core/Type/DateTimeType.php
+++ b/Extension/Core/Type/DateTimeType.php
@@ -31,14 +31,14 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
 
 class DateTimeType extends AbstractType
 {
-    const DEFAULT_DATE_FORMAT = \IntlDateFormatter::MEDIUM;
-    const DEFAULT_TIME_FORMAT = \IntlDateFormatter::MEDIUM;
+    public const DEFAULT_DATE_FORMAT = \IntlDateFormatter::MEDIUM;
+    public const DEFAULT_TIME_FORMAT = \IntlDateFormatter::MEDIUM;
 
     /**
      * The HTML5 datetime-local format as defined in
      * http://w3c.github.io/html-reference/datatypes.html#form.data.datetime-local.
      */
-    const HTML5_FORMAT = "yyyy-MM-dd'T'HH:mm:ss";
+    public const HTML5_FORMAT = "yyyy-MM-dd'T'HH:mm:ss";
 
     private static $acceptedFormats = [
         \IntlDateFormatter::FULL,
diff --git a/Extension/Core/Type/DateType.php b/Extension/Core/Type/DateType.php
index f12b006b..1881709f 100644
--- a/Extension/Core/Type/DateType.php
+++ b/Extension/Core/Type/DateType.php
@@ -28,8 +28,8 @@ use Symfony\Component\OptionsResolver\OptionsResolver;
 
 class DateType extends AbstractType
 {
-    const DEFAULT_FORMAT = \IntlDateFormatter::MEDIUM;
-    const HTML5_FORMAT = 'yyyy-MM-dd';
+    public const DEFAULT_FORMAT = \IntlDateFormatter::MEDIUM;
+    public const HTML5_FORMAT = 'yyyy-MM-dd';
 
     private static $acceptedFormats = [
         \IntlDateFormatter::FULL,
diff --git a/Extension/Core/Type/FileType.php b/Extension/Core/Type/FileType.php
index d3b3eb6d..0afa3d4e 100644
--- a/Extension/Core/Type/FileType.php
+++ b/Extension/Core/Type/FileType.php
@@ -24,8 +24,8 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class FileType extends AbstractType
 {
-    const KIB_BYTES = 1024;
-    const MIB_BYTES = 1048576;
+    public const KIB_BYTES = 1024;
+    public const MIB_BYTES = 1048576;
 
     private static $suffixes = [
         1 => 'bytes',
diff --git a/Extension/Validator/Constraints/Form.php b/Extension/Validator/Constraints/Form.php
index 7d2d7515..49291e67 100644
--- a/Extension/Validator/Constraints/Form.php
+++ b/Extension/Validator/Constraints/Form.php
@@ -18,8 +18,8 @@ use Symfony\Component\Validator\Constraint;
  */
 class Form extends Constraint
 {
-    const NOT_SYNCHRONIZED_ERROR = '1dafa156-89e1-4736-b832-419c2e501fca';
-    const NO_SUCH_FIELD_ERROR = '6e5212ed-a197-4339-99aa-5654798a4854';
+    public const NOT_SYNCHRONIZED_ERROR = '1dafa156-89e1-4736-b832-419c2e501fca';
+    public const NO_SUCH_FIELD_ERROR = '6e5212ed-a197-4339-99aa-5654798a4854';
 
     protected static $errorNames = [
         self::NOT_SYNCHRONIZED_ERROR => 'NOT_SYNCHRONIZED_ERROR',
diff --git a/FormErrorIterator.php b/FormErrorIterator.php
index 3f84f3c3..ee350dd3 100644
--- a/FormErrorIterator.php
+++ b/FormErrorIterator.php
@@ -33,7 +33,7 @@ class FormErrorIterator implements \RecursiveIterator, \SeekableIterator, \Array
     /**
      * The prefix used for indenting nested error messages.
      */
-    const INDENTATION = '    ';
+    public const INDENTATION = '    ';
 
     private $form;
     private $errors;
diff --git a/FormEvents.php b/FormEvents.php
index f7ca06c3..cf4d97f5 100644
--- a/FormEvents.php
+++ b/FormEvents.php
@@ -37,7 +37,7 @@ final class FormEvents
      *
      * @Event("Symfony\Component\Form\Event\PreSubmitEvent")
      */
-    const PRE_SUBMIT = 'form.pre_submit';
+    public const PRE_SUBMIT = 'form.pre_submit';
 
     /**
      * The SUBMIT event is dispatched after the Form::submit() method
@@ -56,7 +56,7 @@ final class FormEvents
      *
      * @Event("Symfony\Component\Form\Event\SubmitEvent")
      */
-    const SUBMIT = 'form.submit';
+    public const SUBMIT = 'form.submit';
 
     /**
      * The FormEvents::POST_SUBMIT event is dispatched at the very end of the Form::submit().
@@ -71,7 +71,7 @@ final class FormEvents
      *
      * @Event("Symfony\Component\Form\Event\PostSubmitEvent")
      */
-    const POST_SUBMIT = 'form.post_submit';
+    public const POST_SUBMIT = 'form.post_submit';
 
     /**
      * The FormEvents::PRE_SET_DATA event is dispatched at the beginning of the Form::setData() method.
@@ -82,7 +82,7 @@ final class FormEvents
      *
      * @Event("Symfony\Component\Form\Event\PreSetDataEvent")
      */
-    const PRE_SET_DATA = 'form.pre_set_data';
+    public const PRE_SET_DATA = 'form.pre_set_data';
 
     /**
      * The FormEvents::POST_SET_DATA event is dispatched at the end of the Form::setData() method.
@@ -92,14 +92,14 @@ final class FormEvents
      *
      * @Event("Symfony\Component\Form\Event\PostSetDataEvent")
      */
-    const POST_SET_DATA = 'form.post_set_data';
+    public const POST_SET_DATA = 'form.post_set_data';
 
     /**
      * Event aliases.
      *
      * These aliases can be consumed by RegisterListenersPass.
      */
-    const ALIASES = [
+    public const ALIASES = [
         PreSubmitEvent::class => self::PRE_SUBMIT,
         SubmitEvent::class => self::SUBMIT,
         PostSubmitEvent::class => self::POST_SUBMIT,
diff --git a/FormRenderer.php b/FormRenderer.php
index ed63d949..100f4789 100644
--- a/FormRenderer.php
+++ b/FormRenderer.php
@@ -23,7 +23,7 @@ use Twig\Environment;
  */
 class FormRenderer implements FormRendererInterface
 {
-    const CACHE_KEY_VAR = 'unique_block_prefix';
+    public const CACHE_KEY_VAR = 'unique_block_prefix';
 
     private $engine;
     private $csrfTokenManager;
diff --git a/Guess/Guess.php b/Guess/Guess.php
index 83facb75..81ed8e19 100644
--- a/Guess/Guess.php
+++ b/Guess/Guess.php
@@ -27,22 +27,22 @@ abstract class Guess
     /**
      * Marks an instance with a value that is extremely likely to be correct.
      */
-    const VERY_HIGH_CONFIDENCE = 3;
+    public const VERY_HIGH_CONFIDENCE = 3;
 
     /**
      * Marks an instance with a value that is very likely to be correct.
      */
-    const HIGH_CONFIDENCE = 2;
+    public const HIGH_CONFIDENCE = 2;
 
     /**
      * Marks an instance with a value that is likely to be correct.
      */
-    const MEDIUM_CONFIDENCE = 1;
+    public const MEDIUM_CONFIDENCE = 1;
 
     /**
      * Marks an instance with a value that may be correct.
      */
-    const LOW_CONFIDENCE = 0;
+    public const LOW_CONFIDENCE = 0;
 
     /**
      * The confidence about the correctness of the value.
diff --git a/Tests/Extension/Core/Type/BaseTypeTest.php b/Tests/Extension/Core/Type/BaseTypeTest.php
index 20618bba..b1167576 100644
--- a/Tests/Extension/Core/Type/BaseTypeTest.php
+++ b/Tests/Extension/Core/Type/BaseTypeTest.php
@@ -21,7 +21,7 @@ abstract class BaseTypeTest extends TypeTestCase
 {
     use VersionAwareTest;
 
-    const TESTED_TYPE = '';
+    public const TESTED_TYPE = '';
 
     public function testPassDisabledAsOption()
     {
diff --git a/Tests/Extension/Core/Type/BirthdayTypeTest.php b/Tests/Extension/Core/Type/BirthdayTypeTest.php
index 8fef1d15..3ca4cf07 100644
--- a/Tests/Extension/Core/Type/BirthdayTypeTest.php
+++ b/Tests/Extension/Core/Type/BirthdayTypeTest.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Form\Tests\Extension\Core\Type;
  */
 class BirthdayTypeTest extends DateTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\BirthdayType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\BirthdayType';
 
     public function testSetInvalidYearsOption()
     {
diff --git a/Tests/Extension/Core/Type/ButtonTypeTest.php b/Tests/Extension/Core/Type/ButtonTypeTest.php
index 9ed86fe4..ed1957c7 100644
--- a/Tests/Extension/Core/Type/ButtonTypeTest.php
+++ b/Tests/Extension/Core/Type/ButtonTypeTest.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Form\Tests\Extension\Core\Type;
  */
 class ButtonTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\ButtonType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\ButtonType';
 
     public function testCreateButtonInstances()
     {
diff --git a/Tests/Extension/Core/Type/CheckboxTypeTest.php b/Tests/Extension/Core/Type/CheckboxTypeTest.php
index e1234740..6f872bbd 100644
--- a/Tests/Extension/Core/Type/CheckboxTypeTest.php
+++ b/Tests/Extension/Core/Type/CheckboxTypeTest.php
@@ -15,7 +15,7 @@ use Symfony\Component\Form\CallbackTransformer;
 
 class CheckboxTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\CheckboxType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\CheckboxType';
 
     public function testDataIsFalseByDefault()
     {
diff --git a/Tests/Extension/Core/Type/ChoiceTypeTest.php b/Tests/Extension/Core/Type/ChoiceTypeTest.php
index 16ede194..6dcaf6bb 100644
--- a/Tests/Extension/Core/Type/ChoiceTypeTest.php
+++ b/Tests/Extension/Core/Type/ChoiceTypeTest.php
@@ -22,7 +22,7 @@ class ChoiceTypeTest extends BaseTypeTest
 {
     use ExpectDeprecationTrait;
 
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\ChoiceType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\ChoiceType';
 
     private $choices = [
         'Bernhard' => 'a',
diff --git a/Tests/Extension/Core/Type/CollectionTypeTest.php b/Tests/Extension/Core/Type/CollectionTypeTest.php
index 706c3f85..3fb2d758 100644
--- a/Tests/Extension/Core/Type/CollectionTypeTest.php
+++ b/Tests/Extension/Core/Type/CollectionTypeTest.php
@@ -17,7 +17,7 @@ use Symfony\Component\Form\Tests\Fixtures\BlockPrefixedFooTextType;
 
 class CollectionTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\CollectionType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\CollectionType';
 
     public function testContainsNoChildByDefault()
     {
diff --git a/Tests/Extension/Core/Type/ColorTypeTest.php b/Tests/Extension/Core/Type/ColorTypeTest.php
index 1a83b44b..cfe7f0c5 100644
--- a/Tests/Extension/Core/Type/ColorTypeTest.php
+++ b/Tests/Extension/Core/Type/ColorTypeTest.php
@@ -16,7 +16,7 @@ use Symfony\Component\Form\FormError;
 
 final class ColorTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = ColorType::class;
+    public const TESTED_TYPE = ColorType::class;
 
     /**
      * @dataProvider validationShouldPassProvider
diff --git a/Tests/Extension/Core/Type/CountryTypeTest.php b/Tests/Extension/Core/Type/CountryTypeTest.php
index 8f565f77..9572f341 100644
--- a/Tests/Extension/Core/Type/CountryTypeTest.php
+++ b/Tests/Extension/Core/Type/CountryTypeTest.php
@@ -16,7 +16,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class CountryTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\CountryType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\CountryType';
 
     protected function setUp(): void
     {
diff --git a/Tests/Extension/Core/Type/CurrencyTypeTest.php b/Tests/Extension/Core/Type/CurrencyTypeTest.php
index 07e212af..8cccfd32 100644
--- a/Tests/Extension/Core/Type/CurrencyTypeTest.php
+++ b/Tests/Extension/Core/Type/CurrencyTypeTest.php
@@ -16,7 +16,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class CurrencyTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\CurrencyType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\CurrencyType';
 
     protected function setUp(): void
     {
diff --git a/Tests/Extension/Core/Type/DateIntervalTypeTest.php b/Tests/Extension/Core/Type/DateIntervalTypeTest.php
index 4add8b13..efbb47be 100644
--- a/Tests/Extension/Core/Type/DateIntervalTypeTest.php
+++ b/Tests/Extension/Core/Type/DateIntervalTypeTest.php
@@ -17,7 +17,7 @@ use Symfony\Component\Form\FormInterface;
 
 class DateIntervalTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = DateIntervalType::class;
+    public const TESTED_TYPE = DateIntervalType::class;
 
     public function testSubmitDateInterval()
     {
diff --git a/Tests/Extension/Core/Type/DateTimeTypeTest.php b/Tests/Extension/Core/Type/DateTimeTypeTest.php
index 306460a9..d9464265 100644
--- a/Tests/Extension/Core/Type/DateTimeTypeTest.php
+++ b/Tests/Extension/Core/Type/DateTimeTypeTest.php
@@ -16,7 +16,7 @@ use Symfony\Component\Form\FormInterface;
 
 class DateTimeTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\DateTimeType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\DateTimeType';
 
     protected function setUp(): void
     {
diff --git a/Tests/Extension/Core/Type/DateTypeTest.php b/Tests/Extension/Core/Type/DateTypeTest.php
index 63175fc0..054b4678 100644
--- a/Tests/Extension/Core/Type/DateTypeTest.php
+++ b/Tests/Extension/Core/Type/DateTypeTest.php
@@ -18,7 +18,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class DateTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\DateType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\DateType';
 
     private $defaultTimezone;
     private $defaultLocale;
diff --git a/Tests/Extension/Core/Type/FileTypeTest.php b/Tests/Extension/Core/Type/FileTypeTest.php
index 7c6e6393..7d3957e9 100644
--- a/Tests/Extension/Core/Type/FileTypeTest.php
+++ b/Tests/Extension/Core/Type/FileTypeTest.php
@@ -21,7 +21,7 @@ use Symfony\Contracts\Translation\TranslatorInterface;
 
 class FileTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\FileType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\FileType';
 
     protected function getExtensions()
     {
diff --git a/Tests/Extension/Core/Type/FormTypeTest.php b/Tests/Extension/Core/Type/FormTypeTest.php
index f5cb8319..48798502 100644
--- a/Tests/Extension/Core/Type/FormTypeTest.php
+++ b/Tests/Extension/Core/Type/FormTypeTest.php
@@ -59,7 +59,7 @@ class FormTest_AuthorWithoutRefSetter
 
 class FormTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\FormType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\FormType';
 
     public function testCreateFormInstances()
     {
diff --git a/Tests/Extension/Core/Type/IntegerTypeTest.php b/Tests/Extension/Core/Type/IntegerTypeTest.php
index 19c730b3..a88eb70c 100644
--- a/Tests/Extension/Core/Type/IntegerTypeTest.php
+++ b/Tests/Extension/Core/Type/IntegerTypeTest.php
@@ -15,7 +15,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class IntegerTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\IntegerType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\IntegerType';
 
     protected function setUp(): void
     {
diff --git a/Tests/Extension/Core/Type/LanguageTypeTest.php b/Tests/Extension/Core/Type/LanguageTypeTest.php
index 488e60bc..4946aca2 100644
--- a/Tests/Extension/Core/Type/LanguageTypeTest.php
+++ b/Tests/Extension/Core/Type/LanguageTypeTest.php
@@ -17,7 +17,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class LanguageTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\LanguageType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\LanguageType';
 
     protected function setUp(): void
     {
diff --git a/Tests/Extension/Core/Type/LocaleTypeTest.php b/Tests/Extension/Core/Type/LocaleTypeTest.php
index dd2af454..8d3eaea3 100644
--- a/Tests/Extension/Core/Type/LocaleTypeTest.php
+++ b/Tests/Extension/Core/Type/LocaleTypeTest.php
@@ -16,7 +16,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class LocaleTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\LocaleType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\LocaleType';
 
     protected function setUp(): void
     {
diff --git a/Tests/Extension/Core/Type/MoneyTypeTest.php b/Tests/Extension/Core/Type/MoneyTypeTest.php
index 1658c419..94f47706 100644
--- a/Tests/Extension/Core/Type/MoneyTypeTest.php
+++ b/Tests/Extension/Core/Type/MoneyTypeTest.php
@@ -15,7 +15,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class MoneyTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\MoneyType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\MoneyType';
 
     private $defaultLocale;
 
diff --git a/Tests/Extension/Core/Type/NumberTypeTest.php b/Tests/Extension/Core/Type/NumberTypeTest.php
index e3c1b58a..4dfe38bf 100644
--- a/Tests/Extension/Core/Type/NumberTypeTest.php
+++ b/Tests/Extension/Core/Type/NumberTypeTest.php
@@ -15,7 +15,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class NumberTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\NumberType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\NumberType';
 
     private $defaultLocale;
 
diff --git a/Tests/Extension/Core/Type/PasswordTypeTest.php b/Tests/Extension/Core/Type/PasswordTypeTest.php
index 872311b9..29756f17 100644
--- a/Tests/Extension/Core/Type/PasswordTypeTest.php
+++ b/Tests/Extension/Core/Type/PasswordTypeTest.php
@@ -13,7 +13,7 @@ namespace Symfony\Component\Form\Tests\Extension\Core\Type;
 
 class PasswordTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\PasswordType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\PasswordType';
 
     public function testEmptyIfNotSubmitted()
     {
diff --git a/Tests/Extension/Core/Type/PercentTypeTest.php b/Tests/Extension/Core/Type/PercentTypeTest.php
index a2a187f5..875ac905 100644
--- a/Tests/Extension/Core/Type/PercentTypeTest.php
+++ b/Tests/Extension/Core/Type/PercentTypeTest.php
@@ -20,7 +20,7 @@ class PercentTypeTest extends TypeTestCase
 {
     use ExpectDeprecationTrait;
 
-    const TESTED_TYPE = PercentType::class;
+    public const TESTED_TYPE = PercentType::class;
 
     private $defaultLocale;
 
diff --git a/Tests/Extension/Core/Type/RepeatedTypeTest.php b/Tests/Extension/Core/Type/RepeatedTypeTest.php
index a70f6502..04e53697 100644
--- a/Tests/Extension/Core/Type/RepeatedTypeTest.php
+++ b/Tests/Extension/Core/Type/RepeatedTypeTest.php
@@ -16,7 +16,7 @@ use Symfony\Component\Form\Tests\Fixtures\NotMappedType;
 
 class RepeatedTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\RepeatedType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\RepeatedType';
 
     /**
      * @var Form
diff --git a/Tests/Extension/Core/Type/SubmitTypeTest.php b/Tests/Extension/Core/Type/SubmitTypeTest.php
index ea9c9d38..5b12ced9 100644
--- a/Tests/Extension/Core/Type/SubmitTypeTest.php
+++ b/Tests/Extension/Core/Type/SubmitTypeTest.php
@@ -16,7 +16,7 @@ namespace Symfony\Component\Form\Tests\Extension\Core\Type;
  */
 class SubmitTypeTest extends ButtonTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\SubmitType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\SubmitType';
 
     public function testCreateSubmitButtonInstances()
     {
diff --git a/Tests/Extension/Core/Type/TextTypeTest.php b/Tests/Extension/Core/Type/TextTypeTest.php
index 42853f60..3f8fbe77 100644
--- a/Tests/Extension/Core/Type/TextTypeTest.php
+++ b/Tests/Extension/Core/Type/TextTypeTest.php
@@ -13,7 +13,7 @@ namespace Symfony\Component\Form\Tests\Extension\Core\Type;
 
 class TextTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\TextType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\TextType';
 
     public function testSubmitNull($expected = null, $norm = null, $view = null)
     {
diff --git a/Tests/Extension/Core/Type/TimeTypeTest.php b/Tests/Extension/Core/Type/TimeTypeTest.php
index 4ec255a6..c31f6f86 100644
--- a/Tests/Extension/Core/Type/TimeTypeTest.php
+++ b/Tests/Extension/Core/Type/TimeTypeTest.php
@@ -17,7 +17,7 @@ use Symfony\Component\Form\FormInterface;
 
 class TimeTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\TimeType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\TimeType';
 
     public function testSubmitDateTime()
     {
diff --git a/Tests/Extension/Core/Type/TimezoneTypeTest.php b/Tests/Extension/Core/Type/TimezoneTypeTest.php
index 699e1d27..af22edf3 100644
--- a/Tests/Extension/Core/Type/TimezoneTypeTest.php
+++ b/Tests/Extension/Core/Type/TimezoneTypeTest.php
@@ -16,7 +16,7 @@ use Symfony\Component\Intl\Util\IntlTestHelper;
 
 class TimezoneTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\TimezoneType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\TimezoneType';
 
     public function testTimezonesAreSelectable()
     {
diff --git a/Tests/Extension/Core/Type/UrlTypeTest.php b/Tests/Extension/Core/Type/UrlTypeTest.php
index 74c4efb8..5a829c95 100644
--- a/Tests/Extension/Core/Type/UrlTypeTest.php
+++ b/Tests/Extension/Core/Type/UrlTypeTest.php
@@ -13,7 +13,7 @@ namespace Symfony\Component\Form\Tests\Extension\Core\Type;
 
 class UrlTypeTest extends TextTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\UrlType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\UrlType';
 
     public function testSubmitAddsDefaultProtocolIfNoneIsIncluded()
     {
diff --git a/Tests/Extension/Core/Type/WeekTypeTest.php b/Tests/Extension/Core/Type/WeekTypeTest.php
index aea4c064..7d0dc195 100644
--- a/Tests/Extension/Core/Type/WeekTypeTest.php
+++ b/Tests/Extension/Core/Type/WeekTypeTest.php
@@ -15,7 +15,7 @@ use Symfony\Component\Form\FormError;
 
 class WeekTypeTest extends BaseTypeTest
 {
-    const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\WeekType';
+    public const TESTED_TYPE = 'Symfony\Component\Form\Extension\Core\Type\WeekType';
 
     public function testSubmitArray()
     {
diff --git a/Tests/Extension/Validator/ValidatorTypeGuesserTest.php b/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
index c4256a31..9d2eeaae 100644
--- a/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
+++ b/Tests/Extension/Validator/ValidatorTypeGuesserTest.php
@@ -41,9 +41,9 @@ use Symfony\Component\Validator\Tests\Fixtures\FakeMetadataFactory;
  */
 class ValidatorTypeGuesserTest extends TestCase
 {
-    const TEST_CLASS = 'Symfony\Component\Form\Tests\Extension\Validator\ValidatorTypeGuesserTest_TestClass';
+    public const TEST_CLASS = 'Symfony\Component\Form\Tests\Extension\Validator\ValidatorTypeGuesserTest_TestClass';
 
-    const TEST_PROPERTY = 'property';
+    public const TEST_PROPERTY = 'property';
 
     /**
      * @var ValidatorTypeGuesser