diff --git a/eth/fetcher/tx_fetcher_test.go b/eth/fetcher/tx_fetcher_test.go
index 9c667dc2a0..416c27b34c 100644
--- a/eth/fetcher/tx_fetcher_test.go
+++ b/eth/fetcher/tx_fetcher_test.go
@@ -93,11 +93,11 @@ type txFetcherTest struct {
 // newTestBlobBuffer returns a BlobBuffer with no-op callbacks for tests that
 // don't exercise blob handling but still need a non-nil buffer.
 func newTestBlobBuffer() *blobpool.BlobBuffer {
-	return blobpool.NewBlobBuffer(
-		func(*types.Transaction) error { return nil },
-		func(*blobpool.BlobTxForPool) error { return nil },
-		func(string) {},
-	)
+	return blobpool.NewBlobBuffer(blobpool.BlobBufferFunctions{
+		ValidateTx: func(*types.Transaction) error { return nil },
+		AddToPool:  func(*blobpool.BlobTxForPool) error { return nil },
+		DropPeer:   func(string) {},
+	})
 }
 
 // newTestTxFetcher creates a tx fetcher with noop callbacks, simulated clock,
diff --git a/tests/fuzzers/txfetcher/txfetcher_fuzzer.go b/tests/fuzzers/txfetcher/txfetcher_fuzzer.go
index 8f8660a515..09825d8c97 100644
--- a/tests/fuzzers/txfetcher/txfetcher_fuzzer.go
+++ b/tests/fuzzers/txfetcher/txfetcher_fuzzer.go
@@ -32,9 +32,9 @@ import (
 )
 
 var (
-	peers         []string
-	peerVersions  map[string]uint
-	txs           []*types.Transaction
+	peers        []string
+	peerVersions map[string]uint
+	txs          []*types.Transaction
 )
 
 func init() {
@@ -91,11 +91,12 @@ func fuzz(input []byte) int {
 		},
 		func(string, []common.Hash) error { return nil },
 		nil,
-		blobpool.NewBlobBuffer(
-			func(*types.Transaction) error { return nil },
-			func(*blobpool.BlobTxForPool) error { return nil },
-			func(string) {},
-		),
+
+		blobpool.NewBlobBuffer(blobpool.BlobBufferFunctions{
+			ValidateTx: func(*types.Transaction) error { return nil },
+			AddToPool:  func(*blobpool.BlobTxForPool) error { return nil },
+			DropPeer:   func(string) {},
+		}),
 		clock,
 		func() time.Time {
 			nanoTime := int64(clock.Now())