diff --git a/tests/codegen-llvm/slp-vectorization-mul3.rs b/tests/codegen-llvm/slp-vectorization-mul3.rs
index bb4965c46bc0..b6edc212c82d 100644
--- a/tests/codegen-llvm/slp-vectorization-mul3.rs
+++ b/tests/codegen-llvm/slp-vectorization-mul3.rs
@@ -1,3 +1,4 @@
+//! Regression test for #142519
 //@ only-x86_64
 //@ compile-flags: -O