diff --git a/src/AcquiaClient.php b/src/AcquiaClient.php
index 5b3ff96..b021c8b 100644
--- a/src/AcquiaClient.php
+++ b/src/AcquiaClient.php
@@ -365,8 +365,8 @@ public function deleteDomain($environmentUuid, $domain): OperationResponse
      */
     public function purgeVarnishCache($environmentUuid, array $domains): OperationResponse
     {
-        $domains = new Domains(self::factory($this->connector));
-        return $domains->purge($environmentUuid, $domains);
+        $domain = new Domains(self::factory($this->connector));
+        return $domain->purge($environmentUuid, $domains);
     }
 
     /**