diff --git a/src/SouthAfricanIdValidator.php b/src/SouthAfricanIdValidator.php
index 72a1688..82d9627 100644
--- a/src/SouthAfricanIdValidator.php
+++ b/src/SouthAfricanIdValidator.php
@@ -7,10 +7,12 @@
 
 class SouthAfricanIdValidator
 {
-
     private const GENDER_MALE_MIN = 5000;
+
     private const GENDER_MALE_MAX = 9999;
+
     private const GENDER_FEMALE_MIN = 0;
+
     private const GENDER_FEMALE_MAX = 4999;
 
     /**
@@ -21,6 +23,7 @@ class SouthAfricanIdValidator
     public function isValid(mixed $idNumber): bool
     {
         $idNumber = $this->trimWhiteSpaces($idNumber);
+
         return ! (! $this->isLength13($idNumber) || ! $this->isNumber($idNumber) || ! $this->passesLuhnCheck($idNumber));
     }
 
@@ -50,6 +53,7 @@ private function extractGenderDigits(string $idNumber): int
     public function isMale(string $idNumber): bool
     {
         $genderDigits = $this->extractGenderDigits($idNumber);
+
         return $genderDigits >= self::GENDER_MALE_MIN && $genderDigits <= self::GENDER_MALE_MAX;
     }
 
@@ -57,6 +61,7 @@ public function isMale(string $idNumber): bool
     public function isFemale(string $idNumber): bool
     {
         $genderDigits = $this->extractGenderDigits($idNumber);
+
         return $genderDigits >= self::GENDER_FEMALE_MIN && $genderDigits <= self::GENDER_FEMALE_MAX;
     }
 
@@ -64,6 +69,7 @@ public function isFemale(string $idNumber): bool
     public function isSACitizen($idNumber): bool
     {
         $idNumber = $this->trimWhiteSpaces($idNumber);
+
         // The 11th digit (index 10) indicates citizenship status
         return $idNumber[10] == '0';
     }
@@ -72,6 +78,7 @@ public function isSACitizen($idNumber): bool
     public function isPermanentResident($idNumber): bool
     {
         $idNumber = $this->trimWhiteSpaces($idNumber);
+
         // The 11th digit (index 10) indicates citizenship status
         return $idNumber[10] == '1';
     }
@@ -80,7 +87,7 @@ public function isPermanentResident($idNumber): bool
     public function parse($idNumber): array
     {
         $idNumber = $this->trimWhiteSpaces($idNumber);
-        if (!$this->isValid($idNumber)) {
+        if (! $this->isValid($idNumber)) {
             throw new \InvalidArgumentException('Invalid ID number');
         }
 
@@ -113,6 +120,7 @@ public function parse($idNumber): array
     private function trimWhiteSpaces(mixed $idNumber): string
     {
         $idNumber = trim((string) $idNumber); // Remove spaces around the string
+
         return str_replace(' ', '', $idNumber); // Remove spaces within the string
     }
 
diff --git a/tests/ValidatorTest.php b/tests/ValidatorTest.php
index 77560a8..ff118d2 100644
--- a/tests/ValidatorTest.php
+++ b/tests/ValidatorTest.php
@@ -46,13 +46,10 @@
     expect($this->validator->isValid($this->id))->toBeTrue();
 });
 
-
 it('can validate list of ID', function ($value) {
     expect($this->validator->isValid($this->id))->toBeTrue();
 })->with(['690124 0689 08 6', '8907290565082', '7809090453082', 9108200519082, '9006010051082']);
 
-
-
 it('parses a valid ID number', function () {
     $result = $this->validator->parse($this->id);
     expect($result['valid'])->toBeTrue()
@@ -62,24 +59,22 @@
         ->and($result['citizenship'])->toBeString();
 });
 
-
-it('should equal date of ISO from', function() {
+it('should equal date of ISO from', function () {
     $result = $this->validator->parse($this->id);
     expect($result['birthday']['iso'])->toEqual('1992-12-23');
 });
 
-it('should equal date of american from', function() {
+it('should equal date of american from', function () {
     $result = $this->validator->parse($this->id);
     expect($result['birthday']['american'])->toEqual('12/23/1992');
 });
 
-it('should equal date of european from', function() {
+it('should equal date of european from', function () {
     $result = $this->validator->parse($this->id);
     expect($result['birthday']['european'])->toEqual('23/12/1992');
 });
 
-it('should equal date of long format from', function() {
+it('should equal date of long format from', function () {
     $result = $this->validator->parse($this->id);
     expect($result['birthday']['long'])->toEqual('December 23, 1992');
 });
-