diff --git a/llvm/test/CodeGen/X86/fast-isel.ll b/llvm/test/CodeGen/X86/fast-isel.ll
index b0be56b64b25..6eeffc523f40 100644
--- a/llvm/test/CodeGen/X86/fast-isel.ll
+++ b/llvm/test/CodeGen/X86/fast-isel.ll
@@ -1,4 +1,5 @@
-; RUN: llvm-as < %s | llc -fast-isel
+; RUN: llvm-as < %s | llc -fast-isel -march=x86
+; RUN: llvm-as < %s | llc -fast-isel -march=x86-64
 
 ; This tests very minimal fast-isel functionality.