diff --git a/src/ApiResource/Project/ProjectTerritory.php b/src/ApiResource/Project/ProjectTerritory.php
index 761ba90..1ee2c2f 100644
--- a/src/ApiResource/Project/ProjectTerritory.php
+++ b/src/ApiResource/Project/ProjectTerritory.php
@@ -19,14 +19,14 @@ class ProjectTerritory
 
     /**
      * ISO 3166-2 first level subdivision code.\
-     * e.g: ES-AN (Andalucía, Spain)
+     * e.g: ES-AN (Andalucía, Spain).
      */
     #[CountrySubdivision()]
     public string $subLvl1;
 
     /**
      * ISO 3166-2 second level subdivision code.\
-     * e.g: ES-GR (Granada, Andalucía, Spain)
+     * e.g: ES-GR (Granada, Andalucía, Spain).
      */
     #[CountrySubdivision()]
     public string $subLvl2;
diff --git a/src/Entity/Project/ProjectTerritory.php b/src/Entity/Project/ProjectTerritory.php
index fd0f811..2a30c4d 100644
--- a/src/Entity/Project/ProjectTerritory.php
+++ b/src/Entity/Project/ProjectTerritory.php
@@ -29,9 +29,8 @@ class ProjectTerritory
     public function __construct(
         string $country,
         ?string $subLvl1 = null,
-        ?string $subLvl2 = null
-    )
-    {
+        ?string $subLvl2 = null,
+    ) {
         $this->country = $country;
         $this->subLvl1 = $subLvl1 ?? null;
         $this->subLvl2 = $subLvl2 ?? null;
diff --git a/src/Validator/CountrySubdivision.php b/src/Validator/CountrySubdivision.php
index 6287fca..dc75c86 100644
--- a/src/Validator/CountrySubdivision.php
+++ b/src/Validator/CountrySubdivision.php
@@ -14,7 +14,7 @@ final class CountrySubdivision extends Constraint
     public function __construct(
         public string $mode = 'strict',
         ?array $groups = null,
-        mixed $payload = null
+        mixed $payload = null,
     ) {
         parent::__construct([], $groups, $payload);
     }
diff --git a/src/Validator/CountrySubdivisionValidator.php b/src/Validator/CountrySubdivisionValidator.php
index e118d82..3387367 100644
--- a/src/Validator/CountrySubdivisionValidator.php
+++ b/src/Validator/CountrySubdivisionValidator.php
@@ -28,6 +28,11 @@ final class CountrySubdivisionValidator extends ConstraintValidator
         ;
     }
 
+    /**
+     * Check if a a string is an actual ISO 3166-2 value.
+     *
+     * @return `true` if the string is a recognized territory
+     */
     public static function validateISO3166_2(string $iso3166_2): bool
     {
         $pieces = \explode('-', $iso3166_2);
diff --git a/tests/Validator/CountrySubdivionValidatorTest.php b/tests/Validator/CountrySubdivionValidatorTest.php
index d1f1ef8..d1a5864 100644
--- a/tests/Validator/CountrySubdivionValidatorTest.php
+++ b/tests/Validator/CountrySubdivionValidatorTest.php
@@ -10,7 +10,7 @@ class CountrySubdivionValidatorTest extends TestCase
     /**
      * @dataProvider isoValid
      */
-    public function testValidatesISO3166_2(string $iso3166_2): void
+    public function testValidatesISO31662(string $iso3166_2): void
     {
         $this->assertTrue(CountrySubdivisionValidator::validateISO3166_2($iso3166_2));
     }