     }
 
     func testAllTokensInKeychain() {
-    do {
         guard let token1 = Token.URLSerializer.deserialize(kValidTokenURL),
             let token2 = Token.URLSerializer.deserialize(kValidTokenURL),
             let token3 = Token.URLSerializer.deserialize(kValidTokenURL) else {

                return
        }

        let noItems = try keychain.allPersistentTokens()
        XCTAssert(noItems.isEmpty, "Array should be empty: \(noItems)")

        let savedItem1 = try keychain.addToken(token1)
        let savedItem2 = try keychain.addToken(token2)
        let savedItem3 = try keychain.addToken(token3)

        let allItems = try keychain.allPersistentTokens()

        XCTAssertNotNil(itemFromArray(allItems, withPersistentRef: savedItem1.identifier),
            "Token not recovered from keychain: \(token1)")
        XCTAssertNotNil(itemFromArray(allItems, withPersistentRef: savedItem2.identifier),
            "Token not recovered from keychain: \(token2)")
        XCTAssertNotNil(itemFromArray(allItems, withPersistentRef: savedItem3.identifier),
            "Token not recovered from keychain: \(token3)")

        do {
            try keychain.deletePersistentToken(savedItem1)

            return
        }

        do {
            let itemsRemaining = try keychain.allPersistentTokens()
            XCTAssertNil(itemFromArray(itemsRemaining, withPersistentRef: savedItem1.identifier),
                "Token not removed from keychain: \(token1)")
            XCTAssertNil(itemFromArray(itemsRemaining, withPersistentRef: savedItem2.identifier),
                "Token not removed from keychain: \(token2)")
            XCTAssertNil(itemFromArray(itemsRemaining, withPersistentRef: savedItem3.identifier),
                "Token not removed from keychain: \(token3)")
        } catch {
            XCTFail("Error thrown from keychain: \(error)")
            return
        }
    }
}
