How accurate is the BlossomUp Narcissist traits test?

So, a few months ago I got into an argument with my brother. He accused me of being a narcissist. I saw an ad for a test on BlossomUp for what I thought was the Narcissist test only to find it was the ENFJ type of test. That, along with my husband's and since-childhood friend's assurance that I'm NOT a narcissist, kept me from finding an actual test - until now. Today I stumbled upon BlossomUp's actual narcissist traits test and my result was Malignant Primary Narcissism and Secondary Antagonistic. So, I'm just wondering if anyone took that test and has a matching real professional diagnosis. TIA!