diff --git a/tests/stdlib/config.nims b/tests/stdlib/config.nims
index e3b6955fc1..dffae28120 100644
--- a/tests/stdlib/config.nims
+++ b/tests/stdlib/config.nims
@@ -3,4 +3,3 @@ switch("styleCheck", "error")
 switch("define", "nimPreviewSlimSystem")
 switch("define", "nimPreviewCstringConversion")
 switch("define", "nimPreviewProcConversion")
-switch("define", "nimSeqsV3")