To remove a test assignment:
 in the toolbar.
 in the toolbar. 
                     		   
                  		
                , or use 
                     			 Ctrl+Click or 
                     			 Shift+Click to select multiple tests and press 
                     			 Del.
, or use 
                     			 Ctrl+Click or 
                     			 Shift+Click to select multiple tests and press 
                     			 Del.