diff --git a/ci/scripts/run-backfill-tests.sh b/ci/scripts/run-backfill-tests.sh
index ac552cfcdcdd0..01b3fc1104b7f 100755
--- a/ci/scripts/run-backfill-tests.sh
+++ b/ci/scripts/run-backfill-tests.sh
@@ -185,9 +185,11 @@ test_sink_backfill_recovery() {
   # Check progress
   sqllogictest -p 4566 -d dev 'e2e_test/backfill/sink/create_sink.slt'
 
+  # Sleep before restart cluster, to ensure the downstream sink actually gets created.
+  sleep 10
+
   # Restart
   restart_cluster
-  sleep 5
 
   # Sink back into rw
   run_sql "CREATE TABLE table_kafka (v1 int primary key)
diff --git a/e2e_test/backfill/sink/create_sink.slt b/e2e_test/backfill/sink/create_sink.slt
index 017eb8e693de2..d064f657c155f 100644
--- a/e2e_test/backfill/sink/create_sink.slt
+++ b/e2e_test/backfill/sink/create_sink.slt
@@ -7,9 +7,9 @@ create table t (v1 int);
 statement ok
 SET STREAMING_RATE_LIMIT = 1000;
 
-# Should finish in 10s
+# Should finish in 20s
 statement ok
-insert into t select * from generate_series(1, 10000);
+insert into t select * from generate_series(1, 20000);
 
 statement ok
 SET BACKGROUND_DDL=true;