test_numb3rs.py giving trouble

Hey all,

So, I am struggling fix the red checks after running check50 on my numb3rs project, screenshot is attached. And I tried to go through the project specifications again to understand, but I couldn't understand the specifications, so I would be glad if someone could explain in crystal clear and basic words what the below means:

To test your tests, run pytest test_numb3rs.py. Try to use correct and incorrect versions of numb3rs.py to determine how well your tests spot errors:

• Ensure you have a correct version of numb3rs.py. Run your tests by executing pytest test_numb3rs.py. pytest should show that all of your tests have passed.
• Modify the validate function in the correct version of numb3rs.py. validate might, for example, only check whether the first byte of the IPv4 address is valid. Run your tests by executing pytest test_numb3rs.py. pytest should show that at least one of your tests has failed.
• Again modify the correct version of numb3rs.py. validate might, for example, mistakenly return True when the user inputs an incorrect IPv4 format. Run your tests by executing pytest test_numb3rs.py. pytest should show that at least one of your tests has failed.

So I think the above description is what might fix my problem, so below is the code for test file:

import pytest
from numb3rs import validate


def test_true():
    assert validate("127.0.0.1") == "True"
    assert validate("255.255.255.255") == "True"
    assert validate("140.247.235.144") == "True"


def test_false():
    assert validate("256.255.255.255") == "False"
    assert validate("64.128.256.512") == "False"


def test_length():
    assert validate("8.8.8") == "False"
    assert validate("10.10.10.10.10") == "False"


def test_tricky():
    assert validate("2001:0db8:85a3:0000:0000:8a2e:0370:7334") == "False"
    assert validate("cat") == "False"

So, would be glad if anybody could help me with this, been working on this for more than 4 hours.

Thanks!