diff --git a/tests/unit/Url/FromJsonTest.php b/tests/unit/Url/FromJsonTest.php
index 12409da..27e4730 100644
--- a/tests/unit/Url/FromJsonTest.php
+++ b/tests/unit/Url/FromJsonTest.php
@@ -66,4 +66,13 @@ public function testHostNameWithEmptyUrl(): void
         );
         $url->asString();
     }
+
+    public function testFromDomainAndBillingApi(): void
+    {
+        $this->expectException(\Exception::class);
+        FromJson::fromDomainAndBillingApi(
+            new Domain('test'),
+            new BillingApi('test')
+        );
+    }
 }