[SOLVED][Beta] Issue-Tracker, Mocha testing problem

Hello, I’m getting TypeError: Parameter "url" must be a string, not undefined when I run mocha tests. The program is working based on User Stories(Issue Tracker on Beta), https://mirror-spur.glitch.me/. I can connect to the database and insert new documents.

I forgot to put .config() at the end of the variable for dotenv. Dumb mistake lol.