diff --git a/llvm/test/DebugInfo/debugify-each.ll b/llvm/test/DebugInfo/debugify-each.ll
index 09af37f..b3e08ff 100644
--- a/llvm/test/DebugInfo/debugify-each.ll
+++ b/llvm/test/DebugInfo/debugify-each.ll
@@ -1,15 +1,18 @@
-; RUN: opt -debugify-each -O3 -S -o /dev/null < %s > %t
+; RUN: opt -debugify-each -O3 -S -o /dev/null < %s 2> %t
 ; RUN: FileCheck %s -input-file=%t -check-prefix=MODULE-PASS
 ; RUN: FileCheck %s -input-file=%t -check-prefix=FUNCTION-PASS
 
-; RUN: opt -enable-debugify -debugify-each -O3 -S -o /dev/null < %s > %t
+; RUN: opt -enable-debugify -debugify-each -O3 -S -o /dev/null < %s 2> %t
 ; RUN: FileCheck %s -input-file=%t -check-prefix=MODULE-PASS
 ; RUN: FileCheck %s -input-file=%t -check-prefix=FUNCTION-PASS
 
-; RUN: opt -debugify-each -instrprof -instrprof -sroa -sccp -S -o /dev/null < %s > %t
+; RUN: opt -debugify-each -instrprof -instrprof -sroa -sccp -S -o /dev/null < %s 2> %t
 ; RUN: FileCheck %s -input-file=%t -check-prefix=MODULE-PASS
 ; RUN: FileCheck %s -input-file=%t -check-prefix=FUNCTION-PASS
 
+; Verify that debugify each can be safely used with piping
+; RUN: opt -debugify-each -O1 < %s | opt -O2 -o /dev/null
+
 define void @foo() {
   ret void
 }