diff --git a/test/main.ino b/test/main.ino
index de044cb..1fdd32e 100644
--- a/test/main.ino
+++ b/test/main.ino
@@ -8,7 +8,7 @@ void setup() {
 }
 
 void loop() {
-  printf("JSON: {%m:%g,[%d]}\n", ESC("value"), 1.234, 42);
+  printf("JSON: {%m:%g,[%d]}\n", XESC("value"), 1.234, 42);
   printf("Base64: %M\n", fmt_b64, 5, "hello");
   delay(1000);
 }