diff --git a/tests/unit/Tax/Helpers/TaxCest.php b/tests/unit/Tax/Helpers/TaxCest.php
index e1d7d1461..741fcf75c 100644
--- a/tests/unit/Tax/Helpers/TaxCest.php
+++ b/tests/unit/Tax/Helpers/TaxCest.php
@@ -17,6 +17,9 @@ class TaxCest
     public function _before(UnitTester $I)
     {
         $country = Config::get('app.default_country');
+        if ($country === null) {
+            $country = 'DE';
+        }
 
         $tax1 = $I->have(TaxRate::class, [
             'country' => $country,