Index: clang/test/CodeGen/thinlto_backend.ll
===================================================================
--- clang/test/CodeGen/thinlto_backend.ll
+++ clang/test/CodeGen/thinlto_backend.ll
@@ -25,7 +25,7 @@
 ; be empty file.
 ; RUN: opt -o %t5.o %s
 ; RUN: %clang -target x86_64-unknown-linux-gnu -O2 -o %t4.o -x ir %t5.o -c -fthinlto-index=%t.thinlto.bc
-; RUN: llvm-nm %t4.o | FileCheck %s -check-prefix=NO-SYMBOLS
+; RUN: llvm-nm %t4.o 2>&1 | FileCheck %s -check-prefix=NO-SYMBOLS
 ; NO-SYMBOLS: no symbols
 
 ; Ensure f2 was imported. Check for all 3 flavors of -save-temps[=cwd|obj].
Index: lld/test/ELF/lto/thinlto-obj-path.ll
===================================================================
--- lld/test/ELF/lto/thinlto-obj-path.ll
+++ lld/test/ELF/lto/thinlto-obj-path.ll
@@ -7,7 +7,7 @@
 ; RUN: rm -f %t4.o
 ; RUN: ld.lld --plugin-opt=thinlto-index-only --plugin-opt=obj-path=%t4.o -shared %t1.o %t2.o -o %t3
 ; RUN: llvm-readobj -h %t4.o | FileCheck %s
-; RUN: llvm-nm %t4.o | FileCheck %s -check-prefix=NO-SYMBOLS
+; RUN: llvm-nm %t4.o 2>&1 | FileCheck %s -check-prefix=NO-SYMBOLS
 ; NO-SYMBOLS: no symbols
 
 ; CHECK: Format: ELF64-x86-64
Index: llvm/test/Object/nm-shared-object.test
===================================================================
--- llvm/test/Object/nm-shared-object.test
+++ llvm/test/Object/nm-shared-object.test
@@ -30,5 +30,6 @@
 
 ERROR: File format has no dynamic symbol table.
 
-RUN: llvm-nm -D %p/Inputs/trivial-object-test.elf-i386 | FileCheck %s -check-prefix=NO-SYMBOLS
+RUN: llvm-nm -D %p/Inputs/trivial-object-test.elf-i386 2>&1 \
+RUN:         | FileCheck %s -check-prefix=NO-SYMBOLS
 NO-SYMBOLS: no symbols
Index: llvm/test/ThinLTO/X86/empty-module.ll
===================================================================
--- llvm/test/ThinLTO/X86/empty-module.ll
+++ llvm/test/ThinLTO/X86/empty-module.ll
@@ -3,7 +3,7 @@
 ; RUN: rm -f %t2.0
 ; RUN: llvm-lto2 run  %t.bc -r %t.bc,foo,pl -o %t2 -thinlto-distributed-indexes
 ; RUN: llvm-readobj -h %t2.0 | FileCheck %s
-; RUN: llvm-nm %t2.0 | FileCheck %s -check-prefix=NO-SYMBOLS
+; RUN: llvm-nm %t2.0 2>&1 | FileCheck %s -check-prefix=NO-SYMBOLS
 ; NO-SYMBOLS: no symbols
 
 ; CHECK: Format: ELF64-x86-64
Index: llvm/test/tools/llvm-nm/X86/nm-no-symbols.test
===================================================================
--- llvm/test/tools/llvm-nm/X86/nm-no-symbols.test
+++ llvm/test/tools/llvm-nm/X86/nm-no-symbols.test
@@ -1,6 +1,6 @@
 # RUN: yaml2obj %s > %t.o
-# RUN: llvm-nm %t.o | FileCheck %s
-# RUN: llvm-nm --print-file-name %t.o | FileCheck %s --check-prefix=CHECK-PRINT-FILE-NAME
+# RUN: llvm-nm %t.o 2>&1 | FileCheck %s
+# RUN: llvm-nm --print-file-name %t.o 2>&1 | FileCheck %s --check-prefix=CHECK-PRINT-FILE-NAME
 
 !ELF
 FileHeader:
Index: llvm/tools/llvm-nm/llvm-nm.cpp
===================================================================
--- llvm/tools/llvm-nm/llvm-nm.cpp
+++ llvm/tools/llvm-nm/llvm-nm.cpp
@@ -757,22 +757,22 @@
     }
   }
 
-  auto writeFileName = [&]() {
+  auto writeFileName = [&](raw_ostream &S) {
     if (!ArchitectureName.empty())
-      outs() << "(for architecture " << ArchitectureName << "):";
+      S << "(for architecture " << ArchitectureName << "):";
     if (OutputFormat == posix && !ArchiveName.empty())
-      outs() << ArchiveName << "[" << CurrentFilename << "]: ";
+      S << ArchiveName << "[" << CurrentFilename << "]: ";
     else {
       if (!ArchiveName.empty())
-        outs() << ArchiveName << ":";
-      outs() << CurrentFilename << ": ";
+        S << ArchiveName << ":";
+      S << CurrentFilename << ": ";
     }
   };
 
   if (SymbolList.empty()) {
     if (PrintFileName)
-      writeFileName();
-    outs() << "no symbols\n";
+      writeFileName(errs());
+    errs() << "no symbols\n";
   }
 
   for (SymbolListT::iterator I = SymbolList.begin(), E = SymbolList.end();
@@ -797,7 +797,7 @@
         (Weak && NoWeakSymbols))
       continue;
     if (PrintFileName)
-      writeFileName();
+      writeFileName(outs());
     if ((JustSymbolName ||
          (UndefinedOnly && MachO && OutputFormat != darwin)) &&
         OutputFormat != posix) {