correct semantics for ul in ul

Question

I am writing ul inside ul to make a accordion type of menu. But when I check my code below in html validator it gives me these errors

Answer 1

    
Cucumber Test Scripts (GroupId: Info.cukes) 
    
    

        
cucumber-junit
        
cucumber-java
        

            
Supports use of Annotations for cucumber step definitions.
            
        
        
cucumber-java8
        

            
Supports use of Lambda Expressions for cucumber step definitions.
            
        
        
cucumber-picocotainer
    

This is the idea on nesting lists in lists. Happy coding :)