diff --git a/cardano_node_tests/tests/test_configuration.py b/cardano_node_tests/tests/test_configuration.py
index 767c164ed..2ead10141 100644
--- a/cardano_node_tests/tests/test_configuration.py
+++ b/cardano_node_tests/tests/test_configuration.py
@@ -121,13 +121,12 @@ def cluster_slot_length(
 
 
 def check_epoch_length(cluster_obj: clusterlib.ClusterLib) -> None:
-    end_sec = 15
-    end_sec_padded = end_sec + 15  # padded to make sure tip got updated
+    end_sec = 20
+    end_sec_padded = end_sec + 20  # padded to make sure tip got updated
 
     cluster_obj.wait_for_new_epoch()
     epoch = cluster_obj.get_epoch()
-    sleep_time = cluster_obj.epoch_length_sec - end_sec
-    time.sleep(sleep_time)
+    time.sleep(cluster_obj.epoch_length_sec - end_sec)
     assert epoch == cluster_obj.get_epoch()
 
     time.sleep(end_sec_padded)