diff --git a/vlib/sync/channel_select_6_test.v b/vlib/sync/channel_select_6_test.v
index 9a5092a91f..dc00d347d7 100644
--- a/vlib/sync/channel_select_6_test.v
+++ b/vlib/sync/channel_select_6_test.v
@@ -1,4 +1,4 @@
-// vtest retry: 8
+// vtest retry: 15
 
 // This test case runs concurrent 3 instances of `do_select` that
 // communicate with 6 other threads doing send and receive operations.