diff --git a/tests/regress/bad_ram.py b/tests/regress/bad_ram.py
new file mode 100644
index 00000000..0fc7d0bb
--- /dev/null
+++ b/tests/regress/bad_ram.py
@@ -0,0 +1,30 @@
+#!/usr/bin/python
+
+from unicorn import *
+from unicorn.x86_const import *
+
+import regress
+
+
+class Hang(regress.RegressTest):
+
+    def runTest(self):
+        CODE_ADDR = 0x400000
+        RSP_ADDR =  0x200000
+        binary1 = "\xCA\x24\x5D" # retf 0x5d24
+        mu = Uc(UC_ARCH_X86, UC_MODE_64)
+
+        mu.mem_map(CODE_ADDR, 0x5000)
+        mu.mem_map(RSP_ADDR, 0x5000)
+
+        # write machine code to be emulated to memory
+        mu.mem_write(CODE_ADDR, binary1)
+
+        mu.reg_write(UC_X86_REG_RSP, RSP_ADDR)
+
+        # emu for maximum 1 sec.
+        mu.emu_start(CODE_ADDR, 0x400000 + 0x5000, 0)
+
+
+if __name__ == '__main__':
+    regress.main()