diff --git a/assertoor-tests/synchronized-check.yaml b/assertoor-tests/synchronized-check.yaml
index 6804e39..ebd35e6 100644
--- a/assertoor-tests/synchronized-check.yaml
+++ b/assertoor-tests/synchronized-check.yaml
@@ -10,6 +10,7 @@ tasks:
     matrixValues: "clientPairNames"
   config:
     runConcurrent: true
+    failTaskCount: 1
     matrixVar: "checkClient"
     task:
       name: run_tasks_concurrent