diff --git a/src/Utils/FormatUtils.php b/src/Utils/FormatUtils.php
index cc7cc3a1..ec202de1 100644
--- a/src/Utils/FormatUtils.php
+++ b/src/Utils/FormatUtils.php
@@ -268,6 +268,7 @@ public static function getNumberFormatter(
     ): \NumberFormatter {
         $hash = self::hashCode($style, $digits, $roundingMode, $percentSymbol);
         if (!isset(self::$numberFormatters[$hash])) {
+            \Locale::setDefault(self::DEFAULT_LOCALE);
             $formatter = new \NumberFormatter(\Locale::getDefault(), $style);
             $formatter->setAttribute(\NumberFormatter::FRACTION_DIGITS, $digits);
             $formatter->setAttribute(\NumberFormatter::ROUNDING_MODE, $roundingMode);
diff --git a/tests/Utils/FormatUtilsTest.php b/tests/Utils/FormatUtilsTest.php
index 8242601d..5ffaeb2c 100644
--- a/tests/Utils/FormatUtilsTest.php
+++ b/tests/Utils/FormatUtilsTest.php
@@ -308,10 +308,6 @@ public function testFormatId(int|float|string|null $number, string $expected): v
     #[DataProvider('getIntegers')]
     public function testFormatInteger(\Countable|array|int|float|string|null $number, string $expected): void
     {
-        if (!$this->updateLocale()) {
-            self::markTestSkipped('Unable to set locale to "fr_CH".');
-        }
-
         $actual = FormatUtils::formatInt($number);
         self::assertSame($expected, $actual);
     }
@@ -378,9 +374,4 @@ private static function createDate(): \DateTimeInterface
     {
         return new \DateTime(self::DATE_TIME, new \DateTimeZone(FormatUtils::DEFAULT_TIME_ZONE));
     }
-
-    private function updateLocale(): bool
-    {
-        return false !== \ini_set('intl.default_locale', FormatUtils::DEFAULT_LOCALE);
-    }
 }