diff --git a/llvm/test/tools/llvm-ml/macro_function.test b/llvm/test/tools/llvm-ml/macro_function.test
--- a/llvm/test/tools/llvm-ml/macro_function.test
+++ b/llvm/test/tools/llvm-ml/macro_function.test
@@ -103,4 +103,14 @@
   ret
 expr_recursive_test ENDP
 
+custom_strcat MACRO arg1, arg2
+  EXITM <arg1&arg2>
+ENDM
+
+expand_as_directive_test custom_strcat(P, ROC)
+; CHECK-LABEL: expand_as_directive_test:
+
+  ret
+expand_as_directive_test ENDP
+
 end