diff --git a/pageserver/src/import_datadir.rs b/pageserver/src/import_datadir.rs
index 6e7ad61d7b..5bcf607f53 100644
--- a/pageserver/src/import_datadir.rs
+++ b/pageserver/src/import_datadir.rs
@@ -312,7 +312,7 @@ async fn import_wal(
         waldecoder.feed_bytes(&buf);
 
         let mut nrecords = 0;
-        let mut modification = tline.begin_modification(endpoint);
+        let mut modification = tline.begin_modification(last_lsn);
         let mut decoded = DecodedWALRecord::default();
         while last_lsn <= endpoint {
             if let Some((lsn, recdata)) = waldecoder.poll_decode()? {
@@ -448,7 +448,7 @@ pub async fn import_wal_from_tar(
 
         waldecoder.feed_bytes(&bytes[offset..]);
 
-        let mut modification = tline.begin_modification(end_lsn);
+        let mut modification = tline.begin_modification(last_lsn);
         let mut decoded = DecodedWALRecord::default();
         while last_lsn <= end_lsn {
             if let Some((lsn, recdata)) = waldecoder.poll_decode()? {
diff --git a/test_runner/regress/test_attach_tenant_config.py b/test_runner/regress/test_attach_tenant_config.py
index e8f2d6a1a4..d2bd53d8aa 100644
--- a/test_runner/regress/test_attach_tenant_config.py
+++ b/test_runner/regress/test_attach_tenant_config.py
@@ -171,7 +171,6 @@ def test_fully_custom_config(positive_env: NeonEnv):
         "min_resident_size_override": 23,
         "trace_read_requests": True,
         "walreceiver_connect_timeout": "13m",
-        "ingest_batch_size": 100,
     }
 
     ps_http = env.pageserver.http_client()