diff --git a/src/Form/Type/PhoneNumberType.php b/src/Form/Type/PhoneNumberType.php
index 332817b2..e5274a99 100644
--- a/src/Form/Type/PhoneNumberType.php
+++ b/src/Form/Type/PhoneNumberType.php
@@ -170,9 +170,9 @@ public function getBlockPrefix(): string
 
     private function formatDisplayChoice(string $displayType, string $regionName, string $regionCode, string $countryCode, bool $displayEmojiFlag): string
     {
-        $formattedDisplay = sprintf('%s (+%s)', $regionName, $countryCode);
+        $formattedDisplay = \sprintf('%s (+%s)', $regionName, $countryCode);
         if (self::DISPLAY_COUNTRY_SHORT === $displayType) {
-            $formattedDisplay = sprintf('%s +%s', $regionCode, $countryCode);
+            $formattedDisplay = \sprintf('%s +%s', $regionCode, $countryCode);
         }
 
         if ($displayEmojiFlag) {
diff --git a/src/Validator/Constraints/PhoneNumberValidator.php b/src/Validator/Constraints/PhoneNumberValidator.php
index d98ea966..9224ad57 100644
--- a/src/Validator/Constraints/PhoneNumberValidator.php
+++ b/src/Validator/Constraints/PhoneNumberValidator.php
@@ -144,7 +144,7 @@ private function getRegion(PhoneNumberConstraint $constraint): string
             try {
                 $defaultRegion = $this->getPropertyAccessor()->getValue($object, $path);
             } catch (NoSuchPropertyException $e) {
-                throw new ConstraintDefinitionException(sprintf('Invalid property path "%s" provided to "%s" constraint: ', $path, get_debug_type($constraint)).$e->getMessage(), 0, $e);
+                throw new ConstraintDefinitionException(\sprintf('Invalid property path "%s" provided to "%s" constraint: ', $path, get_debug_type($constraint)).$e->getMessage(), 0, $e);
             }
         }