             XCTAssertEqual(thirdKeychainItem.token, modifiedToken)
             XCTAssertEqual(thirdKeychainItem.identifier, keychainItem.identifier)
         } catch {
-            XCTFail("Error thrown from keychain: \(error)")
+            XCTFail("persistentTokenWithIdentifier(_:) failed with error: \(error)")
             return
         }
 

            XCTAssertNotNil(itemFromArray(allItems, withPersistentRef: savedItem3.identifier),
                "Token not recovered from keychain: \(token3)")
        } catch {
            XCTFail("Error thrown from keychain: \(error)")
            return
        }


            let checkItem2 = try keychain.persistentTokenWithIdentifier(savedItem2.identifier)
            XCTAssertNotNil(checkItem2, "Token should be in keychain: \(token2)")
        } catch {
            XCTFail("persistentTokenWithIdentifier(_:) failed with error: \(error)")
            return
        }

