diff --git a/server/src/db.rs b/server/src/db.rs
index 21b7c725a9..49962d7f26 100644
--- a/server/src/db.rs
+++ b/server/src/db.rs
@@ -1460,7 +1460,7 @@ mod tests {
 
         // verify chunk size updated (chunk moved from closing to moving to moved)
         catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "mutable_buffer", 0).unwrap();
-        catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "read_buffer", 1630).unwrap();
+        catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "read_buffer", 1616).unwrap();
 
         db.write_chunk_to_object_store("1970-01-01T00", "cpu", 0, &Default::default())
             .await
@@ -1480,7 +1480,7 @@ mod tests {
             .unwrap();
 
         let expected_parquet_size = 759;
-        catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "read_buffer", 1630).unwrap();
+        catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "read_buffer", 1616).unwrap();
         // now also in OS
         catalog_chunk_size_bytes_metric_eq(
             &test_db.metric_registry,
@@ -1650,7 +1650,7 @@ mod tests {
             .unwrap();
 
         // verify chunk size updated (chunk moved from moved to writing to written)
-        catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "read_buffer", 1630).unwrap();
+        catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "read_buffer", 1616).unwrap();
 
         // drop, the chunk from the read buffer
         db.drop_chunk(partition_key, "cpu", mb_chunk.id()).unwrap();
@@ -1660,7 +1660,7 @@ mod tests {
         );
 
         // verify size is reported until chunk dropped
-        catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "read_buffer", 1630).unwrap();
+        catalog_chunk_size_bytes_metric_eq(&test_db.metric_registry, "read_buffer", 1616).unwrap();
         std::mem::drop(rb_chunk);
 
         // verify chunk size updated (chunk dropped from moved state)
@@ -1733,7 +1733,7 @@ mod tests {
                 ("svr_id", "1"),
             ])
             .histogram()
-            .sample_sum_eq(3231.0)
+            .sample_sum_eq(3189.0)
             .unwrap();
 
         let rb = collect_read_filter(&rb_chunk).await;
@@ -1835,7 +1835,7 @@ mod tests {
                 ("svr_id", "10"),
             ])
             .histogram()
-            .sample_sum_eq(2389.0)
+            .sample_sum_eq(2375.0)
             .unwrap();
 
         // it should be the same chunk!
@@ -1943,7 +1943,7 @@ mod tests {
                 ("svr_id", "10"),
             ])
             .histogram()
-            .sample_sum_eq(2389.0)
+            .sample_sum_eq(2375.0)
             .unwrap();
 
         // Unload RB chunk but keep it in OS
@@ -2343,7 +2343,7 @@ mod tests {
                 Arc::from("cpu"),
                 0,
                 ChunkStorage::ReadBufferAndObjectStore,
-                2380, // size of RB and OS chunks
+                2373, // size of RB and OS chunks
                 1,
             ),
             ChunkSummary::new_without_timestamps(
@@ -2394,7 +2394,7 @@ mod tests {
                 .memory()
                 .read_buffer()
                 .get_total(),
-            1621
+            1614
         );
         assert_eq!(
             db.catalog.state().metrics().memory().parquet().get_total(),