diff --git a/tests/regress/x86_64_eflags.py b/tests/regress/x86_64_eflags.py
new file mode 100644
index 00000000..ca7c48d1
--- /dev/null
+++ b/tests/regress/x86_64_eflags.py
@@ -0,0 +1,38 @@
+#!/usr/bin/python
+import regress
+import unicorn as U
+
+class WrongEFLAGS(regress.RegressTest):
+    def test_eflags(self):
+        # xor r14,r14
+        CODE = 'M1\xf6'
+
+        uc = U.Uc(U.UC_ARCH_X86, U.UC_MODE_64)
+        uc.reg_write(U.x86_const.UC_X86_REG_RIP, 0x6000b0)
+        uc.reg_write(U.x86_const.UC_X86_REG_EFLAGS, 0x200)
+
+        uc.mem_map(0x600000, 0x1000)
+        uc.mem_write(0x6000b0, CODE)
+        uc.emu_start(0x6000b0, 0, count=1)
+
+
+        # Here's the original execution trace for this on actual hardware.
+        #
+        # (gdb) x/i $pc
+        # => 0x6000b0:    xor    %r14,%r14
+        # (gdb) p/x $eflags
+        # $1 = 0x200
+        # (gdb) p $eflags
+        # $2 = [ IF ]
+        # (gdb) si
+        # 0x00000000006000b3 in ?? ()
+        # (gdb) p/x $eflags
+        # $3 = 0x246
+        # (gdb) p $eflags
+        # $4 = [ PF ZF IF ]
+
+        self.assertEqual(0x6000b3, uc.reg_read(U.x86_const.UC_X86_REG_RIP))
+        self.assertEqual(0x246, uc.reg_read(U.x86_const.UC_X86_REG_EFLAGS))
+
+if __name__ == '__main__':
+    regress.main()