Index: llvm/utils/lit/lit/TestRunner.py
===================================================================
--- llvm/utils/lit/lit/TestRunner.py
+++ llvm/utils/lit/lit/TestRunner.py
@@ -1463,9 +1463,9 @@
     except ValueError as e:
         return lit.Test.Result(Test.UNRESOLVED, str(e))
     script = parsed['RUN:'] or []
-    test.xfails = parsed['XFAIL:'] or []
-    test.requires = parsed['REQUIRES:'] or []
-    test.unsupported = parsed['UNSUPPORTED:'] or []
+    test.xfails = test.xfails + (parsed['XFAIL:'] or [])
+    test.requires = test.requires + (parsed['REQUIRES:'] or [])
+    test.unsupported = test.unsupported + (parsed['UNSUPPORTED:'] or [])
     if parsed['ALLOW_RETRIES:']:
         test.allowed_retries = parsed['ALLOW_RETRIES:'][0]