diff --git a/duration-test/go.go b/duration-test/go.go
new file mode 100644
index 0000000..92e5cc1
--- /dev/null
+++ b/duration-test/go.go
@@ -0,0 +1,14 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+    var t time.Duration
+    t = time.Millisecond
+    fmt.Printf("%T %v\n", t, t)
+    t = 3723 * time.Second
+    fmt.Printf("%T %v\n", t, t)
+}