diff --git a/test/MC/Mips/nabi-regs.s b/test/MC/Mips/nabi-regs.s
index 050fb813488..1c192c0e189 100644
--- a/test/MC/Mips/nabi-regs.s
+++ b/test/MC/Mips/nabi-regs.s
@@ -3,10 +3,14 @@
 # for 4 more register parameters (A registers) offsetting
 # the T registers.
 #
-# For now just check N64
 # RUN: llvm-mc %s -triple=mipsel-unknown-linux -show-encoding \
-# RUN: -mcpu=mips64r2 -arch=mips64 | \
-# RUN: FileCheck %s
+# RUN:   -mcpu=mips64r2 -arch=mips64 | FileCheck %s
+#
+# RUN: llvm-mc %s -triple=mipsel-unknown-linux -show-encoding \
+# RUN:   -mcpu=mips64r2 -arch=mips64 -mattr=+n32 | FileCheck %s
+#
+# RUN: llvm-mc %s -triple=mipsel-unknown-linux -show-encoding \
+# RUN:   -mcpu=mips64r2 -arch=mips64 -mattr=+n64 | FileCheck %s
 
     .text
 foo: