diff --git a/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php b/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
index e0a59ae..7efaf70 100644
--- a/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
+++ b/core/tests/Drupal/Tests/Component/Gettext/PoHeaderTest.php
@@ -14,6 +14,7 @@
  * Unit tests for the Gettext PO file header handling features.
  *
  * @see Drupal\Component\Gettext\PoHeader.
+ *
  * @group Gettext
  */
 class PoHeaderTest extends UnitTestCase {
@@ -27,12 +28,14 @@ public static function getInfo() {
   }
 
   /**
-   * Tests that for the given plural expression, the plural formula is parsed
-   * correctly.
+   * Tests that the given plural expression is evaluated with the right plural formula.
+   *
    * @param string $plural
    *  The plural expression.
+   *
    * @param array $expected
    *  Array of expected plural positions keyed by plural value.
+   *
    * @dataProvider getPluralFormulasIterator
    */
   public function testPluralsFormula($plural, $expected) {
@@ -48,6 +51,7 @@ public function testPluralsFormula($plural, $expected) {
   /**
    * Gets pairs of plural expressions and expected plural positions keyed by
    * plural value.
+   *
    * @return array
    *  Pairs of plural expressions and expected plural positions keyed by plural
    *  value.