diff --git a/examples/gno.land/p/demo/tamagotchi/z0_filetest.gno b/examples/gno.land/p/demo/tamagotchi/z0_filetest.gno
index bd3090bb03e..fb7c83a9cb2 100644
--- a/examples/gno.land/p/demo/tamagotchi/z0_filetest.gno
+++ b/examples/gno.land/p/demo/tamagotchi/z0_filetest.gno
@@ -14,7 +14,7 @@ func main() {
 	println(t.Markdown())
 
 	println("\n-- WAIT 20 minutes\n")
-	os_test.Sleep(20 * time.Minute)
+	os.Sleep(20 * time.Minute)
 	println(t.Markdown())
 
 	println("\n-- FEEDx3, PLAYx2, HEALx4\n")
@@ -30,15 +30,15 @@ func main() {
 	println(t.Markdown())
 
 	println("\n-- WAIT 20 minutes\n")
-	os_test.Sleep(20 * time.Minute)
+	os.Sleep(20 * time.Minute)
 	println(t.Markdown())
 
 	println("\n-- WAIT 20 hours\n")
-	os_test.Sleep(20 * time.Hour)
+	os.Sleep(20 * time.Hour)
 	println(t.Markdown())
 
 	println("\n-- WAIT 20 hours\n")
-	os_test.Sleep(20 * time.Hour)
+	os.Sleep(20 * time.Hour)
 	println(t.Markdown())
 }
 
diff --git a/gnovm/pkg/gnolang/uverse.go b/gnovm/pkg/gnolang/uverse.go
index cdf8d1e31c3..f85983bae75 100644
--- a/gnovm/pkg/gnolang/uverse.go
+++ b/gnovm/pkg/gnolang/uverse.go
@@ -747,6 +747,27 @@ func makeUverseNode() {
 			m.Output.Write([]byte(rs))
 		},
 	)
+	defNative("println",
+		Flds( // param
+			"xs", Vrd(AnyT()), // args[0]
+		),
+		nil, // results
+		func(m *Machine) {
+			arg0 := m.LastBlock().GetParams1()
+			xv := arg0
+			xvl := xv.TV.GetLength()
+			ss := make([]string, xvl)
+			for i := 0; i < xvl; i++ {
+				ev := xv.TV.GetPointerAtIndexInt(m.Store, i).Deref()
+				ss[i] = ev.Sprint(m)
+			}
+			rs := strings.Join(ss, " ") + "\n"
+			if debug {
+				println("DEBUG/stdout: " + rs)
+			}
+			m.Output.Write([]byte(rs))
+		},
+	)
 	defNative("recover",
 		nil, // params
 		Flds( // results
diff --git a/gnovm/tests/stdlibs/os/os.gno b/gnovm/tests/stdlibs/os/os.gno
index 1dbacfd0e75..fab66c335b6 100644
--- a/gnovm/tests/stdlibs/os/os.gno
+++ b/gnovm/tests/stdlibs/os/os.gno
@@ -18,7 +18,6 @@ func Sleep(duration int64) {
 	return unmarshal(data, dest)
 }
 
-
 // native bindings
 func writeStderr(p []byte) (n int, err error)
 func writeStdout(p []byte) (n int, err error)