diff --git a/test/cni/Makefile b/test/cni/Makefile
index bf7f6b6..1865592 100644
--- a/test/cni/Makefile
+++ b/test/cni/Makefile
@@ -112,7 +112,10 @@ _check_perf: _wait_up _wait_running
 	         done;
 	$(QUIET) echo "Workaround lingering old conntrack (metallb/kubeproxy bug?)..."
 	$(QUIET) minikube ssh "sudo conntrack -F"
-	$(QUIET) sleep 10
+	$(QUIET) sudo tc filter show veth0 egress
+	$(QUIET) sudo tc filter show veth0 ingress
+	$(QUIET) sudo ip netns exec client tc filter show veth1 egress
+	$(QUIET) sudo ip netns exec client tc filter show veth1 ingress
 	$(QUIET) echo "Launching iperf tests..."
 	set -o pipefail; \
 	NETNS=client ./perf/check_perf.sh 2>&1 | tee .last_perf_report.txt; \