diff --git a/tests/test_iter_utils.py b/tests/test_iter_utils.py
index bbae839311..a4edb5761a 100644
--- a/tests/test_iter_utils.py
+++ b/tests/test_iter_utils.py
@@ -8,8 +8,8 @@
     [
         ([], set()),
         ([0, 0], {0}),
-        ([0, 0, 0], {0, 0}),
-        ([1, 2, 3], {1, 1}),
+        ([0, 0, 0], {0}),
+        ([1, 2, 3], {1}),
         ([1, 5, 8, 8, 10, 15], {4, 3, 0, 2, 5}),
     ],
 )