diff --git a/crates/nu-test-support/src/lib.rs b/crates/nu-test-support/src/lib.rs
index 5f95efbab4..37e78f8f0e 100644
--- a/crates/nu-test-support/src/lib.rs
+++ b/crates/nu-test-support/src/lib.rs
@@ -27,6 +27,9 @@ impl Outcome {
     }
 }
 
+/// Reformat a multiline pipeline into a single line for use with `nu -c`
+///
+/// Warning: Will not correctly handle statements that are not `;` separated!
 pub fn pipeline(commands: &str) -> String {
     commands
         .trim()