Index: lld/test/MachO/fatal-warnings.s
===================================================================
--- lld/test/MachO/fatal-warnings.s
+++ lld/test/MachO/fatal-warnings.s
@@ -1,10 +1,10 @@
 # REQUIRES: x86
 # RUN: llvm-mc -filetype=obj -triple=x86_64-apple-darwin %s -o %t1.o
 
-# RUN: %lld %t1.o -o /dev/null -single_module 2>&1 \
+# RUN: %no_fatal_warnings_lld %t1.o -o /dev/null -single_module 2>&1 \
 # RUN:     | FileCheck -check-prefix=WARNING %s
-# RUN: not %lld %t1.o -fatal_warnings -o /dev/null -single_module 2>&1 \
-# RUN:     | FileCheck -check-prefix=ERROR %s
+# RUN: not %no_fatal_warnings_lld %t1.o -fatal_warnings -o /dev/null \
+# RUN:     -single_module 2>&1 | FileCheck -check-prefix=ERROR %s
 
 # ERROR: error: Option `-single_module' is deprecated
 # WARNING: warning: Option `-single_module' is deprecated
Index: lld/test/MachO/lit.local.cfg
===================================================================
--- lld/test/MachO/lit.local.cfg
+++ lld/test/MachO/lit.local.cfg
@@ -2,5 +2,7 @@
 
 import os
 
-config.substitutions.append(('%lld', 'lld -flavor darwinnew -syslibroot ' +
-  os.path.join(config.test_source_root, "MachO", "Inputs", "MacOSX.sdk")))
+lld = ('lld -flavor darwinnew -syslibroot ' +
+    os.path.join(config.test_source_root, "MachO", "Inputs", "MacOSX.sdk"))
+config.substitutions.append(('%lld', lld + ' -fatal_warnings'))
+config.substitutions.append(('%no_fatal_warnings_lld', lld))