diff --git a/src/Symfony/Component/String/Tests/AbstractAsciiTestCase.php b/src/Symfony/Component/String/Tests/AbstractAsciiTestCase.php
index 0f80dcf74e1df..14727da2394d2 100644
--- a/src/Symfony/Component/String/Tests/AbstractAsciiTestCase.php
+++ b/src/Symfony/Component/String/Tests/AbstractAsciiTestCase.php
@@ -1070,6 +1070,8 @@ public static function provideSnake()
             ['x_y', 'x_y'],
             ['x_y', 'X_Y'],
             ['xu_yo', 'xu_yo'],
+            ['symfony_is_great', 'symfony-is-great'],
+            ['symfony_is_great', 'symfony.is.great'],
             ['symfony_is_great', 'symfonyIsGreat'],
             ['symfony5_is_great', 'symfony5IsGreat'],
             ['symfony5is_great', 'symfony5isGreat'],