Test Case not cleared

Tell us what’s happening:
Describe your issue in detail here.
I didn’t understand why did my test case is not passed.I am attaching screenshot with it.

Your project link(s)

solution: https://replit.com/@gursharankaur08/boilerplate-mochachai

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36

Challenge: Learn How JavaScript Assertions Work

Link to the challenge:

Not sure if you change anything but you have this line of code:

assert.isNotNull()(1, '1 is not null');

Look at the parentheses.