diff --git a/scripts/mbedtls_dev/psa_storage.py b/scripts/mbedtls_dev/psa_storage.py
index 3a74007..45f0380 100644
--- a/scripts/mbedtls_dev/psa_storage.py
+++ b/scripts/mbedtls_dev/psa_storage.py
@@ -164,6 +164,10 @@
         """
         return self.bytes().hex()
 
+    def location_value(self) -> int:
+        """The numerical value of the location encoded in the key's lifetime."""
+        return self.lifetime.value() >> 8
+
 
 class TestKey(unittest.TestCase):
     # pylint: disable=line-too-long