[Python] check for refuel pset5 fails

I am doing refuel, a problem set in CS50p; I have restructured my fuel.py code as instructed and it has passed check 50. unfortunately my test_fuel.py code seems to fail check50 but it passed 100% when I check it as per the problem set instructions. can someone tell me what am I doing wrong?

Here is my test_fuel.py code

from fuel import convert, gauge
import pytest


def test_zero_division():
with pytest.raises(ZeroDivisionError):
convert("2/0")

def test_value_error():
with pytest.raises(ValueError):
convert("cat/cat")


def test_convert():
assert convert("1/2") = 50
assert convert("1/100") == 1
assert convert("99/100") == 99

def test_gauge():
gauge(50) == "50%"
gauge(1) == "E"
gauge(99) == "F"


and Here is my fuel.py code, the code that I am testing.

def main():
fraction = input("Fraction: ")
f = convert(fraction)
percent = gauge(f)
print(percent)




def convert(fraction):
while True:
try:
numerator, denominator = fraction.split("/")
denominator = int(denominator)
numerator = int(numerator)
percent = int(numerator / denominator * 100)
if percent <= 100:
return percent

else:
fraction = input("Fraction: ")
pass

except (ZeroDivisionError,ValueError):
raise



def gauge(percent):
# tank is full
if percent >= 99:
return "F"
# tank is empty
elif percent <= 1:
return "E"
# tank is not full or empty
else:
return str(percent) + "%"


if __name__ == "__main__":
main()


I wanted my test_fuel.py to pass check50; but it only pass when I test it as per the problem set instructions.

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