diff --git a/lld/test/MachO/lit.local.cfg b/lld/test/MachO/lit.local.cfg
index 54ee0c1d440a3..6c8fefdc6de5d 100644
--- a/lld/test/MachO/lit.local.cfg
+++ b/lld/test/MachO/lit.local.cfg
@@ -8,6 +8,11 @@ import os
 if sys.byteorder == "big":
     config.unsupported = True
 
+# Swift LLVM fork downstream change start
+# The Swift LLVM fork of lld does not support linking Mach-O for userspace Darwin, let's disable Mach-O tests
+config.unsupported = True
+# Swift LLVM fork downstream change end
+
 # We specify the most commonly-used archs and platform versions in our tests
 # here. Tests which need different settings can just append to this, as only
 # the last value will be used.