diff --git a/e2e_test/iceberg/test_case/iceberg_source_all_delete.slt b/e2e_test/iceberg/test_case/iceberg_source_all_delete.slt
index aa43c888b1507..c678d10d8d216 100644
--- a/e2e_test/iceberg/test_case/iceberg_source_all_delete.slt
+++ b/e2e_test/iceberg/test_case/iceberg_source_all_delete.slt
@@ -35,7 +35,7 @@ flush
 statement ok
 DELETE FROM s1 WHERE i1 < 3;
 
-sleep 16s
+sleep 20s
 
 statement ok
 CREATE SOURCE iceberg_t1_source
@@ -57,7 +57,7 @@ DELETE FROM s1 WHERE i1 > 4;
 statement ok
 flush
 
-sleep 16s
+sleep 20s
 
 query I
 select * from iceberg_t1_source order by i1 limit 5;
diff --git a/e2e_test/iceberg/test_case/iceberg_source_position_delete.slt b/e2e_test/iceberg/test_case/iceberg_source_position_delete.slt
index 0109f39350752..7b14425984ccf 100644
--- a/e2e_test/iceberg/test_case/iceberg_source_position_delete.slt
+++ b/e2e_test/iceberg/test_case/iceberg_source_position_delete.slt
@@ -35,7 +35,7 @@ flush
 statement ok
 DELETE FROM s1 WHERE i1 < 3;
 
-sleep 16s
+sleep 20s
 
 statement ok
 CREATE SOURCE iceberg_t1_source