diff --git a/codex-rs/hooks/src/events/session_start.rs b/codex-rs/hooks/src/events/session_start.rs
index e88a7ed5a2..3f115742c5 100644
--- a/codex-rs/hooks/src/events/session_start.rs
+++ b/codex-rs/hooks/src/events/session_start.rs
@@ -394,7 +394,7 @@ mod tests {
             (
                 "cmd.exe".to_string(),
                 vec!["/D".to_string(), "/C".to_string()],
-                "echo {\"continue\":false,\"stopReason\":\"pause\",\"hookSpecificOutput\":{\"hookEventName\":\"SessionStart\",\"additionalContext\":\"trusted context\"}}".to_string(),
+                r#"echo {^"continue^":false,^"stopReason^":^"pause^",^"hookSpecificOutput^":{^"hookEventName^":^"SessionStart^",^"additionalContext^":^"trusted context^"}}"#.to_string(),
                 "type nul > project-ran && echo project context".to_string(),
             )
         } else {
diff --git a/codex-rs/hooks/src/events/user_prompt_submit.rs b/codex-rs/hooks/src/events/user_prompt_submit.rs
index 6801137c1c..2f148475ff 100644
--- a/codex-rs/hooks/src/events/user_prompt_submit.rs
+++ b/codex-rs/hooks/src/events/user_prompt_submit.rs
@@ -453,7 +453,7 @@ mod tests {
             (
                 "cmd.exe".to_string(),
                 vec!["/D".to_string(), "/C".to_string()],
-                "echo {\"decision\":\"block\",\"reason\":\"slow down\",\"hookSpecificOutput\":{\"hookEventName\":\"UserPromptSubmit\",\"additionalContext\":\"trusted context\"}}".to_string(),
+                r#"echo {^"decision^":^"block^",^"reason^":^"slow down^",^"hookSpecificOutput^":{^"hookEventName^":^"UserPromptSubmit^",^"additionalContext^":^"trusted context^"}}"#.to_string(),
                 "type nul > project-ran && echo project context".to_string(),
             )
         } else {