diff --git a/.github/tests/zombienet-smoke-test.zndsl b/.github/tests/zombienet-smoke-test.zndsl
index c1a6529..30b2c63 100644
--- a/.github/tests/zombienet-smoke-test.zndsl
+++ b/.github/tests/zombienet-smoke-test.zndsl
@@ -11,3 +11,12 @@ bob: log line matches "Imported #[0-9]+" within 20 seconds
 
 alice: parachain 1000 is registered within 60 seconds
 alice: parachain 1000 block height is at least 10 within 200 seconds
+
+alice: count of log lines matching "err=" is 0 within 10 seconds
+alice: count of log lines matching "Error" is 0 within 10 seconds
+
+bob: count of log lines matching "err=" is 0 within 10 seconds
+bob: count of log lines matching "Error" is 0 within 10 seconds
+
+charlie: count of log lines matching "err=" is 0 within 10 seconds
+charlie: count of log lines matching "Error" is 0 within 10 seconds