diff --git a/tests/scripts/generate_tls13_compat_tests.py b/tests/scripts/generate_tls13_compat_tests.py
index e66aefa..77f3374 100755
--- a/tests/scripts/generate_tls13_compat_tests.py
+++ b/tests/scripts/generate_tls13_compat_tests.py
@@ -362,7 +362,7 @@
 
         if self._named_groups:
             named_groups = ','.join(self._named_groups)
-            ret += ["curves={named_groups}".format(named_groups=named_groups)]
+            ret += ["groups={named_groups}".format(named_groups=named_groups)]
         return ret
 
     def pre_checks(self):