IntelliJ IDEA cannot resolve static import

You either want to do this, which will import all of the static members of Assert

import static org.junit.Assert.*;

Or, to get a specific method

import static org.junit.Assert.assertEquals;

Your syntax is wrong - static imports are for static methods, not for classes. I'm guessing you meant to statically import all the methods belonging to org.junit.Assert:

import static org.junit.Assert.*;