diff --git a/src/Suite/Api/ContactList.php b/src/Suite/Api/ContactList.php
index 2d7f8ba..1a7e024 100644
--- a/src/Suite/Api/ContactList.php
+++ b/src/Suite/Api/ContactList.php
@@ -55,7 +55,7 @@ public function findContactListByName(int $customerId, string $listName)
     {
         try {
             foreach ($this->getContactLists($customerId) as $contactListData) {
-                if (trim(strtolower($contactListData['name'])) == strtolower($listName)) {
+                if (trim(strtolower($contactListData['name'])) == trim(strtolower($listName))) {
                     return $contactListData['id'];
                 }
             }
diff --git a/test/unit/Suite/Api/ContactListTest.php b/test/unit/Suite/Api/ContactListTest.php
index 3eaff72..be68e7c 100644
--- a/test/unit/Suite/Api/ContactListTest.php
+++ b/test/unit/Suite/Api/ContactListTest.php
@@ -141,7 +141,7 @@ public function findContactListByName_CasesDoNotMatch_ContactListIdStillReturned
         $this->apiClient->expects($this->once())->method('get')->with($this->endPoints->contactLists($this->customerId))
             ->willReturn($this->apiSuccess($contactLists));
 
-        $contactListId = $this->listService->findContactListByName($this->customerId, trim(strtolower($contactListName)));
+        $contactListId = $this->listService->findContactListByName($this->customerId, $contactListName);
 
         $this->assertEquals($this->contactListId, $contactListId);
     }