diff --git a/tests/ic/config.nims b/tests/ic/config.nims
index a622ec3091..131d27df70 100644
--- a/tests/ic/config.nims
+++ b/tests/ic/config.nims
@@ -1 +1,2 @@
 --mm:refc
+-u:nimSeqsV3
\ No newline at end of file