diff --git a/src/test/java/com/fishercoder/_21Test.java b/src/test/java/com/fishercoder/_21Test.java
new file mode 100644
index 0000000000..8278bba410
--- /dev/null
+++ b/src/test/java/com/fishercoder/_21Test.java
@@ -0,0 +1,29 @@
+package com.fishercoder;
+
+import com.fishercoder.common.classes.ListNode;
+import com.fishercoder.solutions._21;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.util.Arrays;
+
+import static org.junit.Assert.assertEquals;
+
+public class _21Test {
+    private static _21.Solution1 solution1;
+    private static ListNode l1;
+    private static ListNode l2;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _21.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        l1 = ListNode.createSinglyLinkedList(Arrays.asList(1, 3, 5));
+        l2 = ListNode.createSinglyLinkedList(Arrays.asList(2, 4));
+        assertEquals(ListNode.createSinglyLinkedList(Arrays.asList(1, 2, 3, 4, 5)), solution1.mergeTwoLists(l1, l2));
+    }
+
+}
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