diff --git a/src/test/run-pass/backtrace-debuginfo.rs b/src/test/run-pass/backtrace-debuginfo.rs
index 37c889e9df4ad..7f038ddecc1fa 100644
--- a/src/test/run-pass/backtrace-debuginfo.rs
+++ b/src/test/run-pass/backtrace-debuginfo.rs
@@ -10,9 +10,11 @@
 // ignore-pretty issue #37195
 // ignore-cloudabi spawning processes is not supported
 // ignore-emscripten spawning processes is not supported
+// normalize-stderr-test ".*\n" -> ""
 
-// note that above `-opt-bisect-limit=0` is used to basically disable
-// optimizations
+// Note that above `-opt-bisect-limit=0` is used to basically disable
+// optimizations. It creates tons of output on stderr, hence we normalize
+// that away entirely.
 
 use std::env;