diff --git a/tests/.php-cs-fixer.php b/tests/.php-cs-fixer.php
index 42db366..b9014c2 100644
--- a/tests/.php-cs-fixer.php
+++ b/tests/.php-cs-fixer.php
@@ -75,6 +75,7 @@ $config
         'short_scalar_cast' => true,
         'strict_comparison' => true,
         'strict_param' => true,
+        'ternary_to_null_coalescing' => true,
         'trailing_comma_in_multiline' => true,
         'yoda_style' => [
             'equal' => false,