diff --git a/units/en/unit1/quiz.mdx b/units/en/unit1/quiz.mdx
index 5dece14..1ec12f9 100644
--- a/units/en/unit1/quiz.mdx
+++ b/units/en/unit1/quiz.mdx
@@ -79,7 +79,7 @@ At every step:
       explain: "We only see a part of the level close to the player, so we receive an observation."
     },
     {
-      text: "We receive an observation when we play with chess environment",
+      text: "We receive an observation when we play with Super Mario Bros",
       explain: "We only see a part of the level close to the player.",
       correct: true
     }