diff --git a/archiver_test.go b/archiver_test.go
index 899caca..87e4d55 100644
--- a/archiver_test.go
+++ b/archiver_test.go
@@ -140,11 +140,11 @@ func TestCompress(t *testing.T) {
 		assert.NotZero(t, file.Header.CRC32)
 		assert.Equal(t, uint64(info.Size()), file.Header.UncompressedSize64)
 		assert.Equal(t, uint64(file.CompressedData.Len()), file.Header.CompressedSize64)
-		assert.Equal(t, file.CompressedData.Len(), file.Written())
+		assert.Equal(t, int64(file.CompressedData.Len()), file.Written())
 		assertExtendedTimestamp(t, file.Header.Extra)
 	})
 
-	t.Run("writes a maximum of buffer cap bytes", func(t *testing.T) {
+	t.Run("writes a maximum of buffer cap bytes and remainder directly to archived file", func(t *testing.T) {
 		archive, cleanup := testutils.CreateTempArchive(t, archivePath)
 		defer cleanup()
 
@@ -162,7 +162,7 @@ func TestCompress(t *testing.T) {
 
 		assert.Equal(t, file.CompressedData.Len(), bufCap)
 		assert.Equal(t, pool.FileFull, file.Status)
-		assert.Equal(t, file.CompressedData.Len(), file.Written())
+		assert.Equal(t, int64(file.CompressedData.Len()), file.Written())
 	})
 
 	t.Run("for directories", func(t *testing.T) {
@@ -186,7 +186,7 @@ func TestCompress(t *testing.T) {
 		assert.Zero(t, file.Header.CRC32)
 		assert.Equal(t, 0, file.Header.UncompressedSize64)
 		assert.Equal(t, 0, file.Header.CompressedSize64)
-		assert.Equal(t, file.CompressedData.Len(), file.Written())
+		assert.Equal(t, int64(file.CompressedData.Len()), file.Written())
 	})
 }
 
diff --git a/pool/file.go b/pool/file.go
index 18eacfe..a97a9da 100644
--- a/pool/file.go
+++ b/pool/file.go
@@ -17,7 +17,7 @@ type File struct {
 	CompressedData bytes.Buffer
 	Header         *zip.FileHeader
 	Status         Status
-	written        int
+	written        int64
 }
 
 type Status int
@@ -44,7 +44,7 @@ func NewFile(path string, info fs.FileInfo, relativeTo string) (File, error) {
 func (f *File) Write(p []byte) (n int, err error) {
 	if f.CompressedData.Available() != 0 {
 		maxWritable := min(f.CompressedData.Available(), len(p))
-		f.written += maxWritable
+		f.written += int64(maxWritable)
 		return f.CompressedData.Write(p[:int(maxWritable)])
 	}
 
@@ -52,7 +52,7 @@ func (f *File) Write(p []byte) (n int, err error) {
 	return len(p), nil
 }
 
-func (f *File) Written() int {
+func (f *File) Written() int64 {
 	return f.written
 }