diff --git a/FFMpegCore.Test/ArgumentBuilderTest.cs b/FFMpegCore.Test/ArgumentBuilderTest.cs
index 7a058a2..ee954c5 100644
--- a/FFMpegCore.Test/ArgumentBuilderTest.cs
+++ b/FFMpegCore.Test/ArgumentBuilderTest.cs
@@ -180,6 +180,13 @@ public void Builder_BuildString_FrameOutputCount()
             Assert.AreEqual("-i \"input.mp4\" -vframes 50 \"output.mp4\"", str);
         }
 
+        [TestMethod]
+        public void Builder_BuildString_VideoStreamNumber()
+        {
+            var str = FFMpegArguments.FromInputFiles(true, "input.mp4").WithVideoStream(1).OutputToFile("output.mp4", false).Arguments;
+            Assert.AreEqual("-i \"input.mp4\" -map 0:1 \"output.mp4\"", str);
+        }
+
         [TestMethod]
         public void Builder_BuildString_FrameRate()
         {