diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index b36447c..2dfae1c 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -62,6 +62,9 @@
 	};
 
 	config {
+		testing-bool;
+		testing-int = <123>;
+		testing-str = "testing";
 		environment {
 			from_fdt = "yes";
 			fdt_env_path = "";