diff --git a/src/modes/generate_config.rs b/src/modes/generate_config.rs
index 826e2c1..db30c24 100644
--- a/src/modes/generate_config.rs
+++ b/src/modes/generate_config.rs
@@ -163,8 +163,8 @@ fn convert_outputs_to_string_map(
     for (key, value) in outputs {
         match value {
             serde_yaml::Value::Null => {
-                // For null, we want to output "null" as a string
-                result.insert(key.clone(), "null".to_string());
+                // For null, use the key as the value
+                result.insert(key.clone(), key.clone());
             }
             serde_yaml::Value::String(s) => {
                 result.insert(key.clone(), s.clone());