diff --git a/internal/dump/common.go b/internal/dump/common.go
index eb02b1c2e..39172e930 100644
--- a/internal/dump/common.go
+++ b/internal/dump/common.go
@@ -16,11 +16,7 @@ type dumper interface {
 	dumpNode(ctx context.Context, node *restic.Node, repo restic.Repository) error
 }
 
-// WriteDump will write the contents of the given tree to the given destination.
-// It will loop over all nodes in the tree and dump them recursively.
-type WriteDump func(ctx context.Context, repo restic.Repository, tree *restic.Tree, rootPath string, dst io.Writer) error
-
-func writeDump(ctx context.Context, repo restic.Repository, tree *restic.Tree, rootPath string, dmp dumper, dst io.Writer) error {
+func writeDump(ctx context.Context, repo restic.Repository, tree *restic.Tree, rootPath string, dmp dumper) error {
 	for _, rootNode := range tree.Nodes {
 		rootNode.Path = rootPath
 		err := dumpTree(ctx, repo, rootNode, rootPath, dmp)
diff --git a/internal/dump/common_test.go b/internal/dump/common_test.go
index e15659701..f692007be 100644
--- a/internal/dump/common_test.go
+++ b/internal/dump/common_test.go
@@ -3,6 +3,7 @@ package dump
 import (
 	"bytes"
 	"context"
+	"io"
 	"testing"
 
 	"github.com/restic/restic/internal/archiver"
@@ -27,6 +28,7 @@ func prepareTempdirRepoSrc(t testing.TB, src archiver.TestDir) (tempdir string,
 }
 
 type CheckDump func(t *testing.T, testDir string, testDump *bytes.Buffer) error
+type WriteDump func(ctx context.Context, repo restic.Repository, tree *restic.Tree, rootPath string, dst io.Writer) error
 
 func WriteTest(t *testing.T, wd WriteDump, cd CheckDump) {
 	tests := []struct {
diff --git a/internal/dump/tar.go b/internal/dump/tar.go
index f9716d152..b9a9a4633 100644
--- a/internal/dump/tar.go
+++ b/internal/dump/tar.go
@@ -23,7 +23,7 @@ var _ dumper = tarDumper{}
 func WriteTar(ctx context.Context, repo restic.Repository, tree *restic.Tree, rootPath string, dst io.Writer) error {
 	dmp := tarDumper{w: tar.NewWriter(dst)}
 
-	return writeDump(ctx, repo, tree, rootPath, dmp, dst)
+	return writeDump(ctx, repo, tree, rootPath, dmp)
 }
 
 func (dmp tarDumper) Close() error {
diff --git a/internal/dump/zip.go b/internal/dump/zip.go
index f1e779d8e..69bf0a876 100644
--- a/internal/dump/zip.go
+++ b/internal/dump/zip.go
@@ -21,7 +21,7 @@ var _ dumper = zipDumper{}
 func WriteZip(ctx context.Context, repo restic.Repository, tree *restic.Tree, rootPath string, dst io.Writer) error {
 	dmp := zipDumper{w: zip.NewWriter(dst)}
 
-	return writeDump(ctx, repo, tree, rootPath, dmp, dst)
+	return writeDump(ctx, repo, tree, rootPath, dmp)
 }
 
 func (dmp zipDumper) Close() error {