diff --git a/test/MC/Disassembler/ARM/invalid-IT-thumb.txt b/test/MC/Disassembler/ARM/invalid-IT-thumb.txt
new file mode 100644
index 00000000000..9b571b33f5f
--- /dev/null
+++ b/test/MC/Disassembler/ARM/invalid-IT-thumb.txt
@@ -0,0 +1,3 @@
+# RUN: llvm-mc --disassemble %s -triple=thumbv7-unknown-unknown |& grep {potentially undefined instruction encoding}
+
+0xff 0xbf 0x6b 0x80 0x00 0x75