diff --git a/src/pacroller/checker.py b/src/pacroller/checker.py
index f71c171..14fa89f 100644
--- a/src/pacroller/checker.py
+++ b/src/pacroller/checker.py
@@ -266,7 +266,7 @@ def _log_parser(log: List[str], report: checkReport) -> None:
 def sync_err_is_net(output: str) -> bool:
     ''' check if a sync failure is caused by network '''
     output = output.strip().split('\n')
-    if output[-1] == 'error: failed to synchronize all databases':
+    if 'error: failed to synchronize all databases' in output:
         return True
     else:
         return False