diff --git a/Tools/ModelTranslator/rizom_unwrap.py b/Tools/ModelTranslator/rizom_unwrap.py
index 48718dd7..d3a2b3bb 100644
--- a/Tools/ModelTranslator/rizom_unwrap.py
+++ b/Tools/ModelTranslator/rizom_unwrap.py
@@ -33,8 +33,10 @@ def registry_rizom_path():
                 continue
             key_path = "SOFTWARE\\Rizom Lab\\RizomUV VS RS 202%d.%d" % (i, j)
             try:
-                key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, key_path)
-                return winreg.QueryValue(key, "rizomuv.exe")
+                with winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, key_path) as key:
+                    val = winreg.QueryValue(key, "rizomuv.exe")
+                # 注册表值是不带后缀的安装前缀（官方只取 dirname 用），拼回真实 exe
+                return os.path.join(os.path.dirname(val), "rizomuv.exe")
             except OSError:
                 continue
     return None
diff --git a/Tools/ModelTranslator/tests/test_rizom_unwrap.py b/Tools/ModelTranslator/tests/test_rizom_unwrap.py
index aa74dc89..3b2e2096 100644
--- a/Tools/ModelTranslator/tests/test_rizom_unwrap.py
+++ b/Tools/ModelTranslator/tests/test_rizom_unwrap.py
@@ -1,6 +1,7 @@
 import os
 import sys
 import unittest
+from unittest import mock
 
 sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 import rizom_unwrap as ru
@@ -21,10 +22,17 @@ class TestCandidatePaths(unittest.TestCase):
 
 class TestFindRizomuv(unittest.TestCase):
     def test_missing_exe_raises(self):
-        os.environ.pop("RIZOMUV_EXE", None)
-        with self.assertRaises(ru.RizomError):
-            ru.find_rizomuv("Z:/no/such/rizomuv.exe", use_registry=False,
-                            default="Z:/no/default.exe")
+        with mock.patch.dict(os.environ):
+            os.environ.pop("RIZOMUV_EXE", None)
+            with self.assertRaises(ru.RizomError):
+                ru.find_rizomuv("Z:/no/such/rizomuv.exe", use_registry=False,
+                                default="Z:/no/default.exe")
+
+    def test_registry_value_is_real_exe_if_present(self):
+        p = ru.registry_rizom_path()
+        if p is None:
+            self.skipTest("本机无 RizomUV 注册表项")
+        self.assertTrue(os.path.isfile(p), "注册表返回值应是真实 exe：%s" % p)
 
 
 if __name__ == "__main__":