diff --git a/SimpleLinkedList/src/solution/SimpleListTest90.java b/SimpleLinkedList/src/solution/SimpleListTest90.java
new file mode 100644
index 0000000..2c0f6c6
--- /dev/null
+++ b/SimpleLinkedList/src/solution/SimpleListTest90.java
@@ -0,0 +1,34 @@
+package solution;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+
+public abstract class SimpleListTest90 {
+
+	//ISimpleList<Integer> list;
+	ISimpleList<Node<Integer>> nodeList;
+	
+	protected ISimpleList<Integer> getInstance1() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+	protected ISimpleList<Node<Integer>> getInstance2() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+	@BeforeEach
+	void setUp() throws Exception{
+		nodeList = getInstance2();
+	}
+	
+	@Test
+	void testAdd(Node<Integer> node) {
+		boolean actual = nodeList.add(node);
+		
+		assertEquals(true, actual);
+	}
+}