diff --git a/cider/tests/runt.toml b/cider/tests/runt.toml
index a6afe2dd8..f3f5ff132 100644
--- a/cider/tests/runt.toml
+++ b/cider/tests/runt.toml
@@ -123,7 +123,6 @@ fud2 --from calyx --to dat \
          --through cider \
          -s sim.data={}.data \
          -s calyx.args="--log off" \
-         -s cider.flags="--check-data-race" \
          {}
 """