You can print the result to see which inputs cause the failure.

BTW, seems like you solved it, closing...

You've passed the kata. Not a kata issue.

Hi samurai's, I code in python, my all the test cases even cases of attempt are correct, i'm using return as well, all the characters and format is correct, but results comes as failed for every tests, i checked troubleshooting methods and other methods to solve this issue still no answers, I'm going nuts with this kata ,please help me!!!.

I have completed Array.diff task and i'm getting the desired output for 6 basic tests in the compiler and checked all the other relavent test in that task, but it still showing failed results. What should i do??? Help me