diff --git a/library/std/src/sys/process/unix/unix.rs b/library/std/src/sys/process/unix/unix.rs
index 4f595ac9a1c5f..ef2ccb3a832f0 100644
--- a/library/std/src/sys/process/unix/unix.rs
+++ b/library/std/src/sys/process/unix/unix.rs
@@ -1,3 +1,4 @@
+// This is a test.
 #[cfg(target_os = "vxworks")]
 use libc::RTP_ID as pid_t;
 #[cfg(not(target_os = "vxworks"))]