diff --git a/src/main/scala/net/kemitix/s3thorp/Sync.scala b/src/main/scala/net/kemitix/s3thorp/Sync.scala
index cb61cbb..74fdd19 100644
--- a/src/main/scala/net/kemitix/s3thorp/Sync.scala
+++ b/src/main/scala/net/kemitix/s3thorp/Sync.scala
@@ -17,6 +17,9 @@ class Sync(s3Client: S3Client)
   override def objectHead(bucket: Bucket, remoteKey: RemoteKey)=
     s3Client.objectHead(bucket, remoteKey)
 
+  override def upload(localFile: LocalFile, bucket: Bucket, remoteKey: RemoteKey): IO[Unit] =
+    s3Client.upload(localFile, bucket, remoteKey)
+
   def run(c: Config): IO[Unit] = for {
     _ <- putStrLn(s"Bucket: ${c.bucket}, Prefix: ${c.prefix}, Source: ${c.source}")
     _ <- {
diff --git a/src/main/scala/net/kemitix/s3thorp/awssdk/ReactiveS3Client.scala b/src/main/scala/net/kemitix/s3thorp/awssdk/ReactiveS3Client.scala
index 7406da1..89cc32d 100644
--- a/src/main/scala/net/kemitix/s3thorp/awssdk/ReactiveS3Client.scala
+++ b/src/main/scala/net/kemitix/s3thorp/awssdk/ReactiveS3Client.scala
@@ -3,8 +3,9 @@ package net.kemitix.s3thorp.awssdk
 import cats.effect.IO
 import com.github.j5ik2o.reactive.aws.s3.S3AsyncClient
 import com.github.j5ik2o.reactive.aws.s3.cats.S3CatsIOClient
-import software.amazon.awssdk.services.s3.model.{HeadObjectRequest, NoSuchKeyException}
 import net.kemitix.s3thorp.Sync.{Bucket, LocalFile, RemoteKey}
+import software.amazon.awssdk.core.async.AsyncRequestBody
+import software.amazon.awssdk.services.s3.model.{HeadObjectRequest, NoSuchKeyException, PutObjectRequest}
 import software.amazon.awssdk.services.s3.{S3AsyncClient => JavaS3AsyncClient}
 
 private class ReactiveS3Client extends S3Client {
@@ -24,4 +25,17 @@ private class ReactiveS3Client extends S3Client {
       case _: NoSuchKeyException => IO(None)
     }
   }
+
+  override def upload(localFile: LocalFile, bucket: Bucket, remoteKey: RemoteKey): IO[Unit] = {
+    val request = PutObjectRequest.builder()
+      .bucket(bucket)
+      .key(remoteKey)
+      .build()
+    val body = AsyncRequestBody.fromFile(localFile)
+    try {
+      for {
+        _ <- s3Client.putObject(request, body)
+      } yield ()
+    }
+  }
 }
diff --git a/src/main/scala/net/kemitix/s3thorp/awssdk/S3Client.scala b/src/main/scala/net/kemitix/s3thorp/awssdk/S3Client.scala
index 4cf8517..3e55c7c 100644
--- a/src/main/scala/net/kemitix/s3thorp/awssdk/S3Client.scala
+++ b/src/main/scala/net/kemitix/s3thorp/awssdk/S3Client.scala
@@ -7,6 +7,8 @@ trait S3Client {
 
   def objectHead(bucket: Bucket, remoteKey: RemoteKey): IO[Option[(MD5Hash, LastModified)]]
 
+  def upload(localFile: LocalFile, bucket: Bucket, remoteKey: RemoteKey): IO[Unit]
+
 }
 
 object S3Client {
diff --git a/src/test/scala/net/kemitix/s3thorp/DummyS3Client.scala b/src/test/scala/net/kemitix/s3thorp/DummyS3Client.scala
new file mode 100644
index 0000000..78f86be
--- /dev/null
+++ b/src/test/scala/net/kemitix/s3thorp/DummyS3Client.scala
@@ -0,0 +1,12 @@
+package net.kemitix.s3thorp
+
+import cats.effect.IO
+import net.kemitix.s3thorp.Sync.{Bucket, LastModified, LocalFile, MD5Hash, RemoteKey}
+import net.kemitix.s3thorp.awssdk.S3Client
+
+trait DummyS3Client extends S3Client {
+
+  override def objectHead(bucket: Bucket, remoteKey: RemoteKey): IO[Option[(MD5Hash, LastModified)]] = ???
+
+  override def upload(localFile: LocalFile, bucket: Bucket, remoteKey: RemoteKey): IO[Unit] = ???
+}
diff --git a/src/test/scala/net/kemitix/s3thorp/S3MetaDataEnricherSuite.scala b/src/test/scala/net/kemitix/s3thorp/S3MetaDataEnricherSuite.scala
index 8bce7a1..0512465 100644
--- a/src/test/scala/net/kemitix/s3thorp/S3MetaDataEnricherSuite.scala
+++ b/src/test/scala/net/kemitix/s3thorp/S3MetaDataEnricherSuite.scala
@@ -14,7 +14,7 @@ class S3MetaDataEnricherSuite extends FunSpec {
   private val prefix = "prefix"
   private val config = Config("bucket", prefix, source)
 
-  new S3MetaDataEnricher {
+  new S3MetaDataEnricher with DummyS3Client {
     describe("key generator") {
       val subject = generateKey(config)_
 
@@ -36,7 +36,6 @@ class S3MetaDataEnricherSuite extends FunSpec {
         }
       }
     }
-    override def objectHead(bucket: String, key: String) = ???
   }
 
   describe("enrich with metadata") {
@@ -45,7 +44,7 @@ class S3MetaDataEnricherSuite extends FunSpec {
     describe("when remote exists") {
       val hash = "hash"
       val lastModified = Instant.now()
-      new S3MetaDataEnricher {
+      new S3MetaDataEnricher with DummyS3Client {
         override def objectHead(bucket: String, key: String) = IO(Some((hash, lastModified)))
         it("returns metadata") {
           val expectedMetadata = S3MetaData(localFile, s"$prefix/$local", hash, lastModified)
@@ -56,7 +55,7 @@ class S3MetaDataEnricherSuite extends FunSpec {
       }
     }
     describe("when remote doesn't exist") {
-      new S3MetaDataEnricher {
+      new S3MetaDataEnricher with DummyS3Client {
         override def objectHead(bucket: String, key: String) = IO(None)
         it("returns file to upload") {
           val result = enrichWithS3MetaData(config)(localFile).compile.toList.unsafeRunSync().head
diff --git a/src/test/scala/net/kemitix/s3thorp/SyncSuite.scala b/src/test/scala/net/kemitix/s3thorp/SyncSuite.scala
index acacd36..8c6c60b 100644
--- a/src/test/scala/net/kemitix/s3thorp/SyncSuite.scala
+++ b/src/test/scala/net/kemitix/s3thorp/SyncSuite.scala
@@ -11,7 +11,7 @@ class SyncSuite extends FunSpec {
   describe("s3client thunk") {
     val hash = "hash"
     val lastModified = Instant.now()
-    val sync = new Sync(new S3Client {
+    val sync = new Sync(new S3Client with DummyS3Client {
       override def objectHead(bucket: String, key: String) = IO(Some((hash, lastModified)))
     })
     describe("objectHead") {