diff --git a/Lib/test/test_hashlib.py b/Lib/test/test_hashlib.py
index b7b04a3..46088e5 100644
--- a/Lib/test/test_hashlib.py
+++ b/Lib/test/test_hashlib.py
@@ -190,6 +190,15 @@
         self.assertTrue(set(hashlib.algorithms_guaranteed).
                             issubset(hashlib.algorithms_available))
 
+    def test_usedforsecurity(self):
+        for cons in self.hash_constructors:
+            cons(usedforsecurity=True)
+            cons(usedforsecurity=False)
+            cons(b'', usedforsecurity=True)
+            cons(b'', usedforsecurity=False)
+        hashlib.new("sha256", usedforsecurity=True)
+        hashlib.new("sha256", usedforsecurity=False)
+
     def test_unknown_hash(self):
         self.assertRaises(ValueError, hashlib.new, 'spam spam spam spam spam')
         self.assertRaises(TypeError, hashlib.new, 1)
diff --git a/Lib/uuid.py b/Lib/uuid.py
index 188e16b..5f3bc9e 100644
--- a/Lib/uuid.py
+++ b/Lib/uuid.py
@@ -772,8 +772,11 @@
 def uuid3(namespace, name):
     """Generate a UUID from the MD5 hash of a namespace UUID and a name."""
     from hashlib import md5
-    hash = md5(namespace.bytes + bytes(name, "utf-8")).digest()
-    return UUID(bytes=hash[:16], version=3)
+    digest = md5(
+        namespace.bytes + bytes(name, "utf-8"),
+        usedforsecurity=False
+    ).digest()
+    return UUID(bytes=digest[:16], version=3)
 
 def uuid4():
     """Generate a random UUID."""