diff --git a/internal/archiver/archiver.go b/internal/archiver/archiver.go
index 50b09583c..86b329a9a 100644
--- a/internal/archiver/archiver.go
+++ b/internal/archiver/archiver.go
@@ -64,9 +64,19 @@ func (s *ItemStats) Add(other ItemStats) {
 	s.TreeSizeInRepo += other.TreeSizeInRepo
 }
 
+type archiverRepo interface {
+	restic.Loader
+	restic.BlobSaver
+	restic.SaverUnpacked
+
+	Config() restic.Config
+	StartPackUploader(ctx context.Context, wg *errgroup.Group)
+	Flush(ctx context.Context) error
+}
+
 // Archiver saves a directory structure to the repo.
 type Archiver struct {
-	Repo         restic.Repository
+	Repo         archiverRepo
 	SelectByName SelectByNameFunc
 	Select       SelectFunc
 	FS           fs.FS
@@ -160,7 +170,7 @@ func (o Options) ApplyDefaults() Options {
 }
 
 // New initializes a new archiver.
-func New(repo restic.Repository, fs fs.FS, opts Options) *Archiver {
+func New(repo archiverRepo, fs fs.FS, opts Options) *Archiver {
 	arch := &Archiver{
 		Repo:         repo,
 		SelectByName: func(_ string) bool { return true },
diff --git a/internal/archiver/archiver_test.go b/internal/archiver/archiver_test.go
index 8d0c2c02f..f38d5b0de 100644
--- a/internal/archiver/archiver_test.go
+++ b/internal/archiver/archiver_test.go
@@ -36,7 +36,7 @@ func prepareTempdirRepoSrc(t testing.TB, src TestDir) (string, restic.Repository
 	return tempdir, repo
 }
 
-func saveFile(t testing.TB, repo restic.Repository, filename string, filesystem fs.FS) (*restic.Node, ItemStats) {
+func saveFile(t testing.TB, repo archiverRepo, filename string, filesystem fs.FS) (*restic.Node, ItemStats) {
 	wg, ctx := errgroup.WithContext(context.TODO())
 	repo.StartPackUploader(ctx, wg)
 
@@ -416,14 +416,14 @@ func BenchmarkArchiverSaveFileLarge(b *testing.B) {
 }
 
 type blobCountingRepo struct {
-	restic.Repository
+	archiverRepo
 
 	m     sync.Mutex
 	saved map[restic.BlobHandle]uint
 }
 
 func (repo *blobCountingRepo) SaveBlob(ctx context.Context, t restic.BlobType, buf []byte, id restic.ID, storeDuplicate bool) (restic.ID, bool, int, error) {
-	id, exists, size, err := repo.Repository.SaveBlob(ctx, t, buf, id, storeDuplicate)
+	id, exists, size, err := repo.archiverRepo.SaveBlob(ctx, t, buf, id, storeDuplicate)
 	if exists {
 		return id, exists, size, err
 	}
@@ -435,7 +435,7 @@ func (repo *blobCountingRepo) SaveBlob(ctx context.Context, t restic.BlobType, b
 }
 
 func (repo *blobCountingRepo) SaveTree(ctx context.Context, t *restic.Tree) (restic.ID, error) {
-	id, err := restic.SaveTree(ctx, repo.Repository, t)
+	id, err := restic.SaveTree(ctx, repo.archiverRepo, t)
 	h := restic.BlobHandle{ID: id, Type: restic.TreeBlob}
 	repo.m.Lock()
 	repo.saved[h]++
@@ -465,8 +465,8 @@ func TestArchiverSaveFileIncremental(t *testing.T) {
 	tempdir := rtest.TempDir(t)
 
 	repo := &blobCountingRepo{
-		Repository: repository.TestRepository(t),
-		saved:      make(map[restic.BlobHandle]uint),
+		archiverRepo: repository.TestRepository(t),
+		saved:        make(map[restic.BlobHandle]uint),
 	}
 
 	data := rtest.Random(23, 512*1024+887898)
@@ -902,8 +902,8 @@ func TestArchiverSaveDirIncremental(t *testing.T) {
 	tempdir := rtest.TempDir(t)
 
 	repo := &blobCountingRepo{
-		Repository: repository.TestRepository(t),
-		saved:      make(map[restic.BlobHandle]uint),
+		archiverRepo: repository.TestRepository(t),
+		saved:        make(map[restic.BlobHandle]uint),
 	}
 
 	appendToFile(t, filepath.Join(tempdir, "testfile"), []byte("foobar"))
@@ -2017,7 +2017,7 @@ func (m *TrackFS) OpenFile(name string, flag int, perm os.FileMode) (fs.File, er
 }
 
 type failSaveRepo struct {
-	restic.Repository
+	archiverRepo
 	failAfter int32
 	cnt       int32
 	err       error
@@ -2029,7 +2029,7 @@ func (f *failSaveRepo) SaveBlob(ctx context.Context, t restic.BlobType, buf []by
 		return restic.Hash(buf), false, 0, f.err
 	}
 
-	return f.Repository.SaveBlob(ctx, t, buf, id, storeDuplicate)
+	return f.archiverRepo.SaveBlob(ctx, t, buf, id, storeDuplicate)
 }
 
 func TestArchiverAbortEarlyOnError(t *testing.T) {
@@ -2105,9 +2105,9 @@ func TestArchiverAbortEarlyOnError(t *testing.T) {
 			}
 
 			testRepo := &failSaveRepo{
-				Repository: repo,
-				failAfter:  int32(test.failAfter),
-				err:        test.err,
+				archiverRepo: repo,
+				failAfter:    int32(test.failAfter),
+				err:          test.err,
 			}
 
 			// at most two files may be queued
@@ -2134,7 +2134,7 @@ func TestArchiverAbortEarlyOnError(t *testing.T) {
 	}
 }
 
-func snapshot(t testing.TB, repo restic.Repository, fs fs.FS, parent *restic.Snapshot, filename string) (*restic.Snapshot, *restic.Node) {
+func snapshot(t testing.TB, repo archiverRepo, fs fs.FS, parent *restic.Snapshot, filename string) (*restic.Snapshot, *restic.Node) {
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
diff --git a/internal/archiver/archiver_unix_test.go b/internal/archiver/archiver_unix_test.go
index a6b1aad2e..4a380dff8 100644
--- a/internal/archiver/archiver_unix_test.go
+++ b/internal/archiver/archiver_unix_test.go
@@ -46,7 +46,7 @@ func wrapFileInfo(fi os.FileInfo) os.FileInfo {
 	return res
 }
 
-func statAndSnapshot(t *testing.T, repo restic.Repository, name string) (*restic.Node, *restic.Node) {
+func statAndSnapshot(t *testing.T, repo archiverRepo, name string) (*restic.Node, *restic.Node) {
 	fi := lstat(t, name)
 	want, err := restic.NodeFromFileInfo(name, fi, false)
 	rtest.OK(t, err)
diff --git a/internal/archiver/testing.go b/internal/archiver/testing.go
index 278c6a448..106e68445 100644
--- a/internal/archiver/testing.go
+++ b/internal/archiver/testing.go
@@ -25,7 +25,7 @@ func TestSnapshot(t testing.TB, repo restic.Repository, path string, parent *res
 		Tags:     []string{"test"},
 	}
 	if parent != nil {
-		sn, err := restic.LoadSnapshot(context.TODO(), arch.Repo, *parent)
+		sn, err := restic.LoadSnapshot(context.TODO(), repo, *parent)
 		if err != nil {
 			t.Fatal(err)
 		}