diff --git a/tests/primitives/test_nist.py b/tests/primitives/test_nist.py
index a460a3f..40b4533 100644
--- a/tests/primitives/test_nist.py
+++ b/tests/primitives/test_nist.py
@@ -258,7 +258,7 @@
     )
 
     test_KAT2 = generate_encrypt_test(
-        lambda path: load_nist_vectors_from_file(path, "ENCRYPT"),
+        lambda path: load_3des_nist_vectors_from_file(path, "ENCRYPT"),
         os.path.join("3DES", "KAT"),
         [
             "TOFBIinvperm.rsp",