diff --git a/test/MC/ARM/basic-thumb-instructions.s b/test/MC/ARM/basic-thumb-instructions.s
index 04823ae7479..0e4c5807402 100644
--- a/test/MC/ARM/basic-thumb-instructions.s
+++ b/test/MC/ARM/basic-thumb-instructions.s
@@ -331,3 +331,11 @@ _func:
 
 @ CHECK: muls	r1, r2, r1              @ encoding: [0x51,0x43]
 @ CHECK: muls	r3, r4, r3              @ encoding: [0x63,0x43]
+
+
+@------------------------------------------------------------------------------
+@ MVN
+@------------------------------------------------------------------------------
+        mvns r6, r3
+
+@ CHECK: mvns	r6, r3                  @ encoding: [0xde,0x43]