diff --git a/test/MC/ARM/basic-thumb-instructions.s b/test/MC/ARM/basic-thumb-instructions.s
index 630a21a14e2..eb3a2b75d37 100644
--- a/test/MC/ARM/basic-thumb-instructions.s
+++ b/test/MC/ARM/basic-thumb-instructions.s
@@ -118,3 +118,19 @@ _func:
              @   fixup A - offset: 0, value: _bar, kind: fixup_arm_thumb_bl
 @ CHECK: blx	_baz                    @ encoding: [A,0xf0'A',A,0xe8'A']
              @   fixup A - offset: 0, value: _baz, kind: fixup_arm_thumb_blx
+
+
+@------------------------------------------------------------------------------
+@ BLX (register)
+@------------------------------------------------------------------------------
+        blx r4
+
+@ CHECK: blx	r4                      @ encoding: [0xa0,0x47]
+
+
+@------------------------------------------------------------------------------
+@ BX
+@------------------------------------------------------------------------------
+        bx r2
+
+@ CHECK: bx	r2                      @ encoding: [0x10,0x47]