diff --git a/tests/_set.py b/tests/_set.py
index 1f69a1c3..39e578d0 100644
--- a/tests/_set.py
+++ b/tests/_set.py
@@ -76,4 +76,9 @@ assert type({}) is dict
 assert {1,2}.issubset({1,2,3})
 assert {1,2,3}.issuperset({1,2})
 assert {1,2,3}.isdisjoint({4,5,6})
-assert not {1,2,3}.isdisjoint({2,3,4})
\ No newline at end of file
+assert not {1,2,3}.isdisjoint({2,3,4})
+
+x = {i for i in range(3)}
+assert x == {0,1,2}
+x = {i for i in range(3) if i > 0}
+assert x == {1,2}
\ No newline at end of file