/testforblock[Items]

/testforblock -719 56 -365 minecraft:dropper 4 {Items:[{Slot:4b,id:minecraft:paper,Count:1b,Damage:0s,tag:{display:{Name:"Tag"}}}]}

/testforblock -719 56 -365 minecraft:dropper 4 {
	Items:[
		{
			Slot:4b,
			id:minecraft:paper,
			Count:1b,
			Damage:0s,
			tag:{
				display:{
					Name:"Tag"
				}
			}
		}
	]
}