diff --git a/UnitTestStream/SuperTests.cs b/UnitTestStream/SuperTests.cs
index 83c5c6f..7b161f2 100644
--- a/UnitTestStream/SuperTests.cs
+++ b/UnitTestStream/SuperTests.cs
@@ -33,6 +33,19 @@ public void TestSubtract()
             Assert.AreEqual(1, result);
         }
 
+        [TestMethod]
+        public void TestMultiply()
+        {
+            // Arrange
+            TestStream testStream = new TestStream();
+
+            // Act
+            int result = testStream.Multiply(2, 3);
+
+            //Assert
+            Assert.AreEqual(6, result);
+        }
+
         [TestMethod]
         [DataRow(4)]
         public void TestOpenPinBlinkAndClose(int pinNumber)
diff --git a/nanoFramework.IoT.TestStream/TestStream.cs b/nanoFramework.IoT.TestStream/TestStream.cs
index b511dcd..d78d205 100644
--- a/nanoFramework.IoT.TestStream/TestStream.cs
+++ b/nanoFramework.IoT.TestStream/TestStream.cs
@@ -9,6 +9,8 @@ public class TestStream
 
         public int Subtract(int a, int b) => a - b;
 
+        public int Multiply(int a, int b) => a * b;
+
         public void OpenPinBlinkAndClose(int pinNumber)
         {
          GpioController gpioController = new GpioController();