diff --git a/pageserver/src/tenant/storage_layer/delta_layer.rs b/pageserver/src/tenant/storage_layer/delta_layer.rs
index 3bcda731c3..df7451716b 100644
--- a/pageserver/src/tenant/storage_layer/delta_layer.rs
+++ b/pageserver/src/tenant/storage_layer/delta_layer.rs
@@ -118,7 +118,7 @@ impl Summary {
     /// Serializes the summary header into an aligned buffer of lenth `PAGE_SZ`.
     pub fn ser_into_page(&self) -> Result<IoBuffer, SerializeError> {
         let mut buf = IoBufferMut::with_capacity(PAGE_SZ);
-        Self::ser_into(&self, &mut buf)?;
+        Self::ser_into(self, &mut buf)?;
         // Pad zeroes to the buffer so the length is a multiple of the alignment.
         buf.extend_with(0, buf.capacity() - buf.len());
         Ok(buf.freeze())
diff --git a/pageserver/src/tenant/storage_layer/image_layer.rs b/pageserver/src/tenant/storage_layer/image_layer.rs
index 8f52987c20..abd987e258 100644
--- a/pageserver/src/tenant/storage_layer/image_layer.rs
+++ b/pageserver/src/tenant/storage_layer/image_layer.rs
@@ -116,7 +116,7 @@ impl Summary {
     /// Serializes the summary header into an aligned buffer of lenth `PAGE_SZ`.
     pub fn ser_into_page(&self) -> Result<IoBuffer, SerializeError> {
         let mut buf = IoBufferMut::with_capacity(PAGE_SZ);
-        Self::ser_into(&self, &mut buf)?;
+        Self::ser_into(self, &mut buf)?;
         // Pad zeroes to the buffer so the length is a multiple of the alignment.
         buf.extend_with(0, buf.capacity() - buf.len());
         Ok(buf.freeze())
diff --git a/pageserver/src/virtual_file/owned_buffers_io/write.rs b/pageserver/src/virtual_file/owned_buffers_io/write.rs
index c775c346ad..2170845dd8 100644
--- a/pageserver/src/virtual_file/owned_buffers_io/write.rs
+++ b/pageserver/src/virtual_file/owned_buffers_io/write.rs
@@ -340,7 +340,7 @@ mod tests {
         writer.write_buffered_borrowed(b"j", ctx).await?;
         writer.write_buffered_borrowed(b"klmno", ctx).await?;
 
-        let (_, recorder) = writer.shutdown(|buf| Some(buf)).await?;
+        let (_, recorder) = writer.shutdown(Some).await?;
         assert_eq!(
             recorder.get_writes(),
             {