diff --git a/src/main/scala/net/kemitix/s3thorp/Sync.scala b/src/main/scala/net/kemitix/s3thorp/Sync.scala
index a026422..4e22b4d 100644
--- a/src/main/scala/net/kemitix/s3thorp/Sync.scala
+++ b/src/main/scala/net/kemitix/s3thorp/Sync.scala
@@ -10,7 +10,10 @@ import net.kemitix.s3thorp.awssdk.S3Client
 
 import scala.concurrent.Promise
 
-class Sync(s3Client: S3Client) extends LocalFileStream with S3MetaDataEnricher {
+class Sync(s3Client: S3Client)
+  extends LocalFileStream
+    with S3MetaDataEnricher
+    with UploadSelectionFilter {
 
   override def objectHead(bucket: String, key: String)=
     s3Client.objectHead(bucket, key)
@@ -25,15 +28,6 @@ class Sync(s3Client: S3Client) extends LocalFileStream with S3MetaDataEnricher {
     }
   } yield ()
 
-  private def uploadRequiredFilter: Either[File, S3MetaData] => Stream[IO, File] = {
-    case Left(file) => Stream(file)
-    case Right(s3Metadata) =>
-      Stream.eval(for {
-        _ <- putStrLn(s"upload required: ${s3Metadata.localFile}")
-        //md5File(localFile)
-        //filter(localHash => options.force || localHash != metadataHash)
-      } yield s3Metadata.localFile)
-  }
   private def performUpload: File => Stream[IO, Promise[Unit]] =
     file => Stream.eval(for {
       _ <- putStrLn(s"upload: $file")
diff --git a/src/main/scala/net/kemitix/s3thorp/UploadSelectionFilter.scala b/src/main/scala/net/kemitix/s3thorp/UploadSelectionFilter.scala
new file mode 100644
index 0000000..b22dc46
--- /dev/null
+++ b/src/main/scala/net/kemitix/s3thorp/UploadSelectionFilter.scala
@@ -0,0 +1,21 @@
+package net.kemitix.s3thorp
+
+import java.io.File
+
+import fs2.Stream
+import cats.effect.IO
+import net.kemitix.s3thorp.Main.putStrLn
+
+trait UploadSelectionFilter {
+
+  def uploadRequiredFilter: Either[File, S3MetaData] => Stream[IO, File] = {
+    case Left(file) => Stream(file)
+    case Right(s3Metadata) =>
+      Stream.eval(for {
+        _ <- putStrLn(s"upload required: ${s3Metadata.localFile}")
+        //md5File(localFile)
+        //filter(localHash => options.force || localHash != metadataHash)
+      } yield s3Metadata.localFile)
+  }
+
+}