diff --git a/PHPCSUtils/BackCompat/BCFile.php b/PHPCSUtils/BackCompat/BCFile.php
index 4a786015..dfdd98c7 100644
--- a/PHPCSUtils/BackCompat/BCFile.php
+++ b/PHPCSUtils/BackCompat/BCFile.php
@@ -524,7 +524,7 @@ public static function getMethodParameters(File $phpcsFile, $stackPtr)
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 0.0.5.
-     * - The upstream method has received no significant updates since PHPCS 3.13.0.
+     * - The upstream method has received no significant updates since PHPCS 3.13.3.
      *
      * @see \PHP_CodeSniffer\Files\File::getMethodProperties()      Original source.
      * @see \PHPCSUtils\Utils\FunctionDeclarations::getProperties() PHPCSUtils native improved version.
@@ -559,6 +559,7 @@ public static function getMethodProperties(File $phpcsFile, $stackPtr)
      *   'is_static'       => boolean,       // TRUE if the static keyword was found.
      *   'is_readonly'     => boolean,       // TRUE if the readonly keyword was found.
      *   'is_final'        => boolean,       // TRUE if the final keyword was found.
+     *   'is_abstract'     => boolean,       // TRUE if the abstract keyword was found.
      *   'type'            => string,        // The type of the var (empty if no type specified).
      *   'type_token'      => integer|false, // The stack pointer to the start of the type
      *                                       // or FALSE if there is no type.
@@ -573,6 +574,7 @@ public static function getMethodProperties(File $phpcsFile, $stackPtr)
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 0.0.5.
+     * - PHPCS 3.13.3: support for PHP 8.4 abstract properties.
      * - PHPCS 4.0: properties in interfaces (PHP 8.4+) are accepted.
      * - PHPCS 4.0: will no longer throw a parse error warning.
      *
@@ -580,6 +582,8 @@ public static function getMethodProperties(File $phpcsFile, $stackPtr)
      * @see \PHPCSUtils\Utils\Variables::getMemberProperties() PHPCSUtils native improved version.
      *
      * @since 1.0.0
+     * @since 1.1.0 Sync with PHPCS 4.0.0, remove parse error warning and support PHP 8.4 properties in interfaces. PHPCS(new)#991
+     * @since 1.1.2 Sync with PHPCS 3.13.3, support for abstract properties. PHPCS(new)#xxx
      *
      * @param \PHP_CodeSniffer\Files\File $phpcsFile The file being scanned.
      * @param int                         $stackPtr  The position in the stack of the `T_VARIABLE` token to
@@ -626,6 +630,7 @@ public static function getMemberProperties(File $phpcsFile, $stackPtr)
             T_VAR      => T_VAR,
             T_READONLY => T_READONLY,
             T_FINAL    => T_FINAL,
+            T_ABSTRACT => T_ABSTRACT,
         ];
 
         $valid += Tokens::$scopeModifiers;
@@ -637,6 +642,7 @@ public static function getMemberProperties(File $phpcsFile, $stackPtr)
         $isStatic       = false;
         $isReadonly     = false;
         $isFinal        = false;
+        $isAbstract     = false;
 
         $startOfStatement = $phpcsFile->findPrevious(
             [
@@ -684,6 +690,9 @@ public static function getMemberProperties(File $phpcsFile, $stackPtr)
                 case T_FINAL:
                     $isFinal = true;
                     break;
+                case T_ABSTRACT:
+                    $isAbstract = true;
+                    break;
             }
         }
 
@@ -728,6 +737,7 @@ public static function getMemberProperties(File $phpcsFile, $stackPtr)
             'is_static'       => $isStatic,
             'is_readonly'     => $isReadonly,
             'is_final'        => $isFinal,
+            'is_abstract'     => $isAbstract,
             'type'            => $type,
             'type_token'      => $typeToken,
             'type_end_token'  => $typeEndToken,
@@ -751,7 +761,7 @@ public static function getMemberProperties(File $phpcsFile, $stackPtr)
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 1.3.0.
-     * - The upstream method has received no significant updates since PHPCS 3.13.0.
+     * - The upstream method has received no significant updates since PHPCS 3.13.3.
      *
      * @see \PHP_CodeSniffer\Files\File::getClassProperties()          Original source.
      * @see \PHPCSUtils\Utils\ObjectDeclarations::getClassProperties() PHPCSUtils native improved version.
@@ -779,7 +789,7 @@ public static function getClassProperties(File $phpcsFile, $stackPtr)
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 0.0.5.
-     * - The upstream method has received no significant updates since PHPCS 3.13.0.
+     * - The upstream method has received no significant updates since PHPCS 3.13.3.
      *
      * @see \PHP_CodeSniffer\Files\File::isReference() Original source.
      * @see \PHPCSUtils\Utils\Operators::isReference() PHPCSUtils native improved version.
@@ -805,7 +815,7 @@ public static function isReference(File $phpcsFile, $stackPtr)
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 0.0.5.
-     * - The upstream method has received no significant updates since PHPCS 3.13.0.
+     * - The upstream method has received no significant updates since PHPCS 3.13.3.
      *
      * @see \PHP_CodeSniffer\Files\File::getTokensAsString() Original source.
      * @see \PHPCSUtils\Utils\GetTokensAsString              Related set of functions.
@@ -834,7 +844,7 @@ public static function getTokensAsString(File $phpcsFile, $start, $length, $orig
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 2.1.0.
-     * - The upstream method has received no significant updates since PHPCS 3.13.0.
+     * - The upstream method has received no significant updates since PHPCS 3.13.3.
      *
      * @see \PHP_CodeSniffer\Files\File::findStartOfStatement() Original source.
      *
@@ -858,7 +868,7 @@ public static function findStartOfStatement(File $phpcsFile, $start, $ignore = n
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 2.1.0.
-     * - The upstream method has received no significant updates since PHPCS 3.13.0.
+     * - The upstream method has received no significant updates since PHPCS 3.13.3.
      *
      * @see \PHP_CodeSniffer\Files\File::findEndOfStatement() Original source.
      *
@@ -882,7 +892,7 @@ public static function findEndOfStatement(File $phpcsFile, $start, $ignore = nul
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 0.0.5.
-     * - The upstream method has received no significant updates since PHPCS 3.13.0.
+     * - The upstream method has received no significant updates since PHPCS 3.13.3.
      *
      * @see \PHP_CodeSniffer\Files\File::hasCondition()  Original source.
      * @see \PHPCSUtils\Utils\Conditions::hasCondition() PHPCSUtils native alternative.
@@ -907,7 +917,7 @@ public static function hasCondition(File $phpcsFile, $stackPtr, $types)
      *
      * Changelog for the PHPCS native function:
      * - Introduced in PHPCS 1.3.0.
-     * - The upstream method has received no significant updates since PHPCS 3.13.0.
+     * - The upstream method has received no significant updates since PHPCS 3.13.3.
      *
      * @see \PHP_CodeSniffer\Files\File::getCondition()  Original source.
      * @see \PHPCSUtils\Utils\Conditions::getCondition() More versatile alternative.
diff --git a/PHPCSUtils/BackCompat/BCTokens.php b/PHPCSUtils/BackCompat/BCTokens.php
index 49b8c155..68102588 100644
--- a/PHPCSUtils/BackCompat/BCTokens.php
+++ b/PHPCSUtils/BackCompat/BCTokens.php
@@ -72,7 +72,7 @@ final class BCTokens
 
     /**
      * Handle calls to (undeclared) methods for token arrays which haven't received any
-     * changes since PHPCS 3.13.0.
+     * changes since PHPCS 3.13.3.
      *
      * @since 1.0.0
      *
diff --git a/PHPCSUtils/Tokens/Collections.php b/PHPCSUtils/Tokens/Collections.php
index 5cfada12..43288eec 100644
--- a/PHPCSUtils/Tokens/Collections.php
+++ b/PHPCSUtils/Tokens/Collections.php
@@ -478,6 +478,7 @@ final class Collections
         \T_VAR           => \T_VAR,
         \T_READONLY      => \T_READONLY,
         \T_FINAL         => \T_FINAL,
+        \T_ABSTRACT      => \T_ABSTRACT,
     ];
 
     /**
diff --git a/PHPCSUtils/Utils/Variables.php b/PHPCSUtils/Utils/Variables.php
index 817134c4..b7469489 100644
--- a/PHPCSUtils/Utils/Variables.php
+++ b/PHPCSUtils/Utils/Variables.php
@@ -108,6 +108,7 @@ final class Variables
      *                 'is_static'       => boolean,       // TRUE if the static keyword was found.
      *                 'is_readonly'     => boolean,       // TRUE if the readonly keyword was found.
      *                 'is_final'        => boolean,       // TRUE if the final keyword was found.
+     *                 'is_abstract'     => boolean,       // TRUE if the abstract keyword was found.
      *                 'type'            => string,        // The type of the var (empty if no type specified).
      *                 'type_token'      => integer|false, // The stack pointer to the start of the type
      *                                                     // or FALSE if there is no type.
@@ -155,6 +156,7 @@ public static function getMemberProperties(File $phpcsFile, $stackPtr)
         $isStatic       = false;
         $isReadonly     = false;
         $isFinal        = false;
+        $isAbstract     = false;
 
         $startOfStatement = $phpcsFile->findPrevious(
             [
@@ -211,6 +213,9 @@ public static function getMemberProperties(File $phpcsFile, $stackPtr)
                 case \T_FINAL:
                     $isFinal = true;
                     break;
+                case \T_ABSTRACT:
+                    $isAbstract = true;
+                    break;
             }
         }
 
@@ -254,6 +259,7 @@ public static function getMemberProperties(File $phpcsFile, $stackPtr)
             'is_static'       => $isStatic,
             'is_readonly'     => $isReadonly,
             'is_final'        => $isFinal,
+            'is_abstract'     => $isAbstract,
             'type'            => $type,
             'type_token'      => $typeToken,
             'type_end_token'  => $typeEndToken,
diff --git a/README.md b/README.md
index 09d034ff..d1096462 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ Whether you need to split an `array` into the individual items, are trying to de
 
 Includes improved versions of the PHPCS native utility functions and plenty of new utility functions.
 
-These functions are compatible with PHPCS 3.13.0 up to PHPCS `4.x`.
+These functions are compatible with PHPCS 3.13.3 up to PHPCS `4.x`.
 
 ### A collection of static properties and methods for often-used token groups
 
@@ -78,7 +78,7 @@ To see detailed information about all the available abstract sniffs, utility fun
 ## Minimum Requirements
 
 * PHP 5.4 or higher.
-* [PHP_CodeSniffer] 3.13.0+/4.0.0+.
+* [PHP_CodeSniffer] 3.13.3+/4.0.0+.
 * Recommended PHP extensions for optimal functionality:
     - PCRE with Unicode support (normally enabled by default)
 
diff --git a/Tests/BackCompat/BCFile/GetMemberPropertiesTest.inc b/Tests/BackCompat/BCFile/GetMemberPropertiesTest.inc
index ccc90fa6..3b27cbe2 100644
--- a/Tests/BackCompat/BCFile/GetMemberPropertiesTest.inc
+++ b/Tests/BackCompat/BCFile/GetMemberPropertiesTest.inc
@@ -401,3 +401,27 @@ class AsymVisibility {
     /* testPHP84IllegalAsymPublicProtectedSetStaticProperty */
     public protected(set) static mixed $prop10;
 }
+
+abstract class WithAbstractProperties {
+    /* testPHP84AbstractPublicTypedProp */
+    abstract public string $val1 { get; }
+    /* testPHP84AbstractProtectedTypedProp */
+    abstract protected Union|Type $val2 { set; }
+    /* testPHP84AbstractMiddleTypedProp */
+    public abstract Intersection&Type $val3 { get; }
+    /* testPHP84AbstractImplicitVisibilityTypedProp */
+    abstract int $val4 { set; }
+    /* testPHP84AbstractImplicitVisibilityProp */
+    abstract $val5 { get; }
+    /* testPHP84AbstractNullableTypedProp */
+    abstract public ?string $val6 { set; }
+    /* testPHP84AbstractComplexTypedProp */
+    abstract protected (Foo&\Bar)|false $val7 { get; }
+
+    /* testPHP84IllegalAbstractPrivateProp */
+    private abstract string $val8 { get; }
+    /* testPHP84IllegalAbstractReadonlyProp */
+    public readonly abstract string $val9 { get; }
+    /* testPHP84IllegalAbstractStaticProp */
+    public abstract static string $val10 { get; }
+}
diff --git a/Tests/BackCompat/BCFile/GetMemberPropertiesTest.php b/Tests/BackCompat/BCFile/GetMemberPropertiesTest.php
index 31e9516b..81321a2e 100644
--- a/Tests/BackCompat/BCFile/GetMemberPropertiesTest.php
+++ b/Tests/BackCompat/BCFile/GetMemberPropertiesTest.php
@@ -99,6 +99,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -114,6 +115,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?int',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -129,6 +131,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -144,6 +147,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -159,6 +163,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -174,6 +179,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'bool',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -189,6 +195,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -204,6 +211,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'array',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -219,6 +227,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -234,6 +243,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -249,6 +259,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -264,6 +275,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -279,6 +291,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -294,6 +307,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -309,6 +323,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -324,6 +339,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -339,6 +355,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -354,6 +371,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -369,6 +387,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -384,6 +403,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'float',
                     'type_token'      => -6,
                     'type_end_token'  => -6,
@@ -399,6 +419,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'float',
                     'type_token'      => -13,
                     'type_end_token'  => -13,
@@ -414,6 +435,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?string',
                     'type_token'      => -6,
                     'type_end_token'  => -6,
@@ -429,6 +451,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?string',
                     'type_token'      => -17,
                     'type_end_token'  => -17,
@@ -444,6 +467,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -459,6 +483,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -474,6 +499,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -489,6 +515,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -504,6 +531,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -519,6 +547,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -534,6 +563,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -549,6 +579,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -564,6 +595,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -579,6 +611,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -594,6 +627,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?array',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -609,6 +643,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '\MyNamespace\MyClass',
                     'type_token'      => ($php8Names === true) ? -2 : -5,
                     'type_end_token'  => -2,
@@ -624,6 +659,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?ClassName',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -639,6 +675,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?Folder\ClassName',
                     'type_token'      => ($php8Names === true) ? -2 : -4,
                     'type_end_token'  => -2,
@@ -654,6 +691,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '\MyNamespace\MyClass\Foo',
                     'type_token'      => ($php8Names === true) ? -15 : -18,
                     'type_end_token'  => -2,
@@ -669,6 +707,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -684,6 +723,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -699,6 +739,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -714,6 +755,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -729,6 +771,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'miXed',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -744,6 +787,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?mixed',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -759,6 +803,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?namespace\Name',
                     'type_token'      => ($php8Names === true) ? -2 : -4,
                     'type_end_token'  => -2,
@@ -774,6 +819,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'int|float',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -789,6 +835,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'MyClassA|\Package\MyClassB',
                     'type_token'      => ($php8Names === true) ? -4 : -7,
                     'type_end_token'  => -2,
@@ -804,6 +851,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'array|bool|int|float|NULL|object|string',
                     'type_token'      => -14,
                     'type_end_token'  => -2,
@@ -819,6 +867,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'false|mixed|self|parent|iterable|Resource',
                     'type_token'      => -12,
                     'type_end_token'  => -2,
@@ -834,6 +883,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     // Missing static, but that's OK as not an allowed syntax.
                     'type'            => 'callable|void',
                     'type_token'      => -6,
@@ -850,6 +900,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?int|float',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -865,6 +916,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'null',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -880,6 +932,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'false',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -895,6 +948,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'bool|FALSE',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -910,6 +964,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'object|ClassName',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -925,6 +980,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'iterable|array|Traversable',
                     'type_token'      => -6,
                     'type_end_token'  => -2,
@@ -940,6 +996,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'int|string|INT',
                     'type_token'      => -10,
                     'type_end_token'  => -2,
@@ -955,6 +1012,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'int',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -970,6 +1028,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?array',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -985,6 +1044,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'string|int',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1000,6 +1060,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'string|null',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1015,6 +1076,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'string|int',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1030,6 +1092,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '\InterfaceA|\Sub\InterfaceB|false',
                     'type_token'      => ($php8Names === true) ? -7 : -11,
                     'type_end_token'  => -3,
@@ -1045,6 +1108,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1060,6 +1124,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -1075,6 +1140,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1090,6 +1156,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?int|float',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1105,6 +1172,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'mixed',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1120,6 +1188,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'Foo&Bar',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1135,6 +1204,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'Foo&Bar&Baz',
                     'type_token'      => -6,
                     'type_end_token'  => -2,
@@ -1150,6 +1220,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'int&string',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1165,6 +1236,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?Foo&Bar',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1181,6 +1253,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'int|string',
                     'type_token'      => -8,
                     'type_end_token'  => -2,
@@ -1196,6 +1269,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '\Foo&Bar',
                     'type_token'      => ($php8Names === true) ? -8 : -9,
                     'type_end_token'  => -2,
@@ -1211,6 +1285,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'true',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1226,6 +1301,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?true',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1241,6 +1317,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'int|string|true',
                     'type_token'      => -6,
                     'type_end_token'  => -2,
@@ -1256,6 +1333,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'true|FALSE',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1272,6 +1350,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '(Foo&\Bar)|bool',
                     'type_token'      => ($php8Names === true) ? -8 : -9,
                     'type_end_token'  => -2,
@@ -1287,6 +1366,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'float|(Partially\Qualified&Traversable)',
                     'type_token'      => ($php8Names === true) ? -8 : -10,
                     'type_end_token'  => -2,
@@ -1302,6 +1382,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '(namespace\Foo&Bar)|string',
                     'type_token'      => ($php8Names === true) ? -8 : -10,
                     'type_end_token'  => -2,
@@ -1317,6 +1398,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?(A&\Pck\B)|bool',
                     'type_token'      => ($php8Names === true) ? -8 : -11,
                     'type_end_token'  => -2,
@@ -1332,6 +1414,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1347,6 +1430,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1362,6 +1446,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1377,6 +1462,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1392,6 +1478,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1407,6 +1494,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1422,6 +1510,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -1437,6 +1526,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => '?string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1452,6 +1542,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => '(Foo&\Bar)|bool',
                     'type_token'      => ($php8Names === true) ? -8 : -9,
                     'type_end_token'  => -2,
@@ -1468,6 +1559,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'mixed',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1483,6 +1575,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '(A&B)|null',
                     'type_token'      => -8,
                     'type_end_token'  => -2,
@@ -1498,6 +1591,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'bool',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1513,6 +1607,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => true,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'mixed',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1528,6 +1623,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'string',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1543,6 +1639,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => '?float',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1558,6 +1655,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'string|int',
                     'type_token'      => -4,
                     'type_end_token'  => -2,
@@ -1573,6 +1671,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => true,
+                    'is_abstract'     => false,
                     'type'            => '',
                     'type_token'      => false,
                     'type_end_token'  => false,
@@ -1588,6 +1687,7 @@ public static function dataGetMemberProperties()
                     'is_static'       => false,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'mixed',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
@@ -1603,12 +1703,173 @@ public static function dataGetMemberProperties()
                     'is_static'       => true,
                     'is_readonly'     => false,
                     'is_final'        => false,
+                    'is_abstract'     => false,
                     'type'            => 'mixed',
                     'type_token'      => -2,
                     'type_end_token'  => -2,
                     'nullable_type'   => false,
                 ],
             ],
+            'php8.4-abstract-public-property'                              => [
+                'identifier' => '/* testPHP84AbstractPublicTypedProp */',
+                'expected'   => [
+                    'scope'           => 'public',
+                    'scope_specified' => true,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => 'string',
+                    'type_token'      => -2,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => false,
+                ],
+            ],
+            'php8.4-abstract-protected-property'                           => [
+                'identifier' => '/* testPHP84AbstractProtectedTypedProp */',
+                'expected'   => [
+                    'scope'           => 'protected',
+                    'scope_specified' => true,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => 'Union|Type',
+                    'type_token'      => -4,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => false,
+                ],
+            ],
+            'php8.4-abstract-middle-keyword-property'                      => [
+                'identifier' => '/* testPHP84AbstractMiddleTypedProp */',
+                'expected'   => [
+                    'scope'           => 'public',
+                    'scope_specified' => true,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => 'Intersection&Type',
+                    'type_token'      => -4,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => false,
+                ],
+            ],
+            'php8.4-abstract-implicit-public-typed-property'               => [
+                'identifier' => '/* testPHP84AbstractImplicitVisibilityTypedProp */',
+                'expected'   => [
+                    'scope'           => 'public',
+                    'scope_specified' => false,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => 'int',
+                    'type_token'      => -2,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => false,
+                ],
+            ],
+            'php8.4-abstract-implicit-public-untyped-property'             => [
+                'identifier' => '/* testPHP84AbstractImplicitVisibilityProp */',
+                'expected'   => [
+                    'scope'           => 'public',
+                    'scope_specified' => false,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => '',
+                    'type_token'      => false,
+                    'type_end_token'  => false,
+                    'nullable_type'   => false,
+                ],
+            ],
+            'php8.4-abstract-public-nullable-typed-property'               => [
+                'identifier' => '/* testPHP84AbstractNullableTypedProp */',
+                'expected'   => [
+                    'scope'           => 'public',
+                    'scope_specified' => true,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => '?string',
+                    'type_token'      => -2,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => true,
+                ],
+            ],
+            'php8.4-abstract-protected-complex-type-property'              => [
+                'identifier' => '/* testPHP84AbstractComplexTypedProp */',
+                'expected'   => [
+                    'scope'           => 'protected',
+                    'scope_specified' => true,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => '(Foo&\Bar)|false',
+                    'type_token'      => ($php8Names === true) ? -8 : -9,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => false,
+                ],
+            ],
+            'php8.4-illegal-abstract-private-property'                     => [
+                'identifier' => '/* testPHP84IllegalAbstractPrivateProp */',
+                'expected'   => [
+                    'scope'           => 'private',
+                    'scope_specified' => true,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => 'string',
+                    'type_token'      => -2,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => false,
+                ],
+            ],
+            'php8.4-illegal-abstract-readonly-property'                    => [
+                'identifier' => '/* testPHP84IllegalAbstractReadonlyProp */',
+                'expected'   => [
+                    'scope'           => 'public',
+                    'scope_specified' => true,
+                    'set_scope'       => false,
+                    'is_static'       => false,
+                    'is_readonly'     => true,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => 'string',
+                    'type_token'      => -2,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => false,
+                ],
+            ],
+            'php8.4-illegal-abstract-static-property'                      => [
+                'identifier' => '/* testPHP84IllegalAbstractStaticProp */',
+                'expected'   => [
+                    'scope'           => 'public',
+                    'scope_specified' => true,
+                    'set_scope'       => false,
+                    'is_static'       => true,
+                    'is_readonly'     => false,
+                    'is_final'        => false,
+                    'is_abstract'     => true,
+                    'type'            => 'string',
+                    'type_token'      => -2,
+                    'type_end_token'  => -2,
+                    'nullable_type'   => false,
+                ],
+            ],
         ];
     }
 
diff --git a/Tests/BackCompat/Helper/GetVersionTest.php b/Tests/BackCompat/Helper/GetVersionTest.php
index 9a05b9d3..b6bf7804 100644
--- a/Tests/BackCompat/Helper/GetVersionTest.php
+++ b/Tests/BackCompat/Helper/GetVersionTest.php
@@ -30,7 +30,7 @@ final class GetVersionTest extends TestCase
      *
      * @var string
      */
-    const LATEST_3X_VERSION = '3.13.2';
+    const LATEST_3X_VERSION = '3.13.3';
 
     /**
      * Version number of the last PHPCS 4.x release.
@@ -56,7 +56,7 @@ public function testGetVersion()
         }
 
         if ($expected === 'lowest') {
-            $expected = '3.13.0';
+            $expected = '3.13.3';
         }
 
         $result = Helper::getVersion();
diff --git a/composer.json b/composer.json
index 7fd8d7be..5155061e 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     },
     "require" : {
         "php" : ">=5.4",
-        "squizlabs/php_codesniffer" : "^3.13.0 || ^4.0",
+        "squizlabs/php_codesniffer" : "^3.13.3 || ^4.0",
         "dealerdirect/phpcodesniffer-composer-installer" : "^0.4.1 || ^0.5 || ^0.6.2 || ^0.7 || ^1.0"
     },
     "require-dev" : {