diff --git a/rslib/src/backend.rs b/rslib/src/backend.rs
index e0bf8f909..14b1d4a34 100644
--- a/rslib/src/backend.rs
+++ b/rslib/src/backend.rs
@@ -6,7 +6,7 @@ use crate::backend_proto::backend_input::Value;
 use crate::backend_proto::{Empty, RenderedTemplateReplacement, SyncMediaIn};
 use crate::cloze::expand_clozes_to_reveal_latex;
 use crate::err::{AnkiError, NetworkErrorKind, Result, SyncErrorKind};
-use crate::media::sync::{sync_media, Progress as MediaSyncProgress};
+use crate::media::sync::{MediaSyncer, Progress as MediaSyncProgress};
 use crate::media::MediaManager;
 use crate::sched::{local_minutes_west_for_stamp, sched_timing_today};
 use crate::template::{
@@ -318,14 +318,16 @@ impl Backend {
     }
 
     fn sync_media(&self, input: SyncMediaIn) -> Result<()> {
-        let mut mgr = MediaManager::new(&input.media_folder, &input.media_db)?;
+        let mgr = MediaManager::new(&input.media_folder, &input.media_db)?;
 
         let callback = |progress: MediaSyncProgress| {
             self.fire_progress_callback(Progress::MediaSync(progress))
         };
 
         let mut rt = Runtime::new().unwrap();
-        rt.block_on(sync_media(&mut mgr, &input.hkey, callback, &input.endpoint))
+
+        let mut syncer = MediaSyncer::new(&mgr, callback, &input.endpoint);
+        rt.block_on(syncer.sync(&input.hkey))
     }
 }
 
diff --git a/rslib/src/media/sync.rs b/rslib/src/media/sync.rs
index 911a23ab5..efabcda18 100644
--- a/rslib/src/media/sync.rs
+++ b/rslib/src/media/sync.rs
@@ -33,7 +33,7 @@ pub enum Progress {
     RemovedFiles(usize),
 }
 
-struct SyncContext<'a, P>
+pub struct MediaSyncer<'a, P>
 where
     P: Fn(Progress) -> bool,
 {
@@ -45,18 +45,101 @@ where
     endpoint: &'a str,
 }
 
-impl<P> SyncContext<'_, P>
+#[derive(Debug, Deserialize)]
+struct SyncBeginResult {
+    data: Option<SyncBeginResponse>,
+    err: String,
+}
+
+#[derive(Debug, Deserialize)]
+struct SyncBeginResponse {
+    #[serde(rename = "sk")]
+    sync_key: String,
+    usn: i32,
+}
+
+#[derive(Debug, Clone, Copy)]
+enum LocalState {
+    NotInDB,
+    InDBNotPending,
+    InDBAndPending,
+}
+
+#[derive(PartialEq, Debug)]
+enum RequiredChange {
+    // none also covers the case where we'll later upload
+    None,
+    Download,
+    Delete,
+    RemovePending,
+}
+
+#[derive(Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct RecordBatchRequest {
+    last_usn: i32,
+}
+
+#[derive(Debug, Deserialize)]
+struct RecordBatchResult {
+    data: Option<Vec<ServerMediaRecord>>,
+    err: String,
+}
+
+#[derive(Debug, Deserialize)]
+struct ServerMediaRecord {
+    fname: String,
+    usn: i32,
+    sha1: String,
+}
+
+#[derive(Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
+struct ZipRequest<'a> {
+    files: &'a [&'a String],
+}
+
+#[derive(Serialize_tuple)]
+struct UploadEntry<'a> {
+    fname: &'a str,
+    in_zip_name: Option<String>,
+}
+
+#[derive(Deserialize, Debug)]
+struct UploadResult {
+    data: Option<UploadReply>,
+    err: String,
+}
+
+#[derive(Deserialize, Debug)]
+struct UploadReply {
+    processed: usize,
+    current_usn: i32,
+}
+
+#[derive(Serialize)]
+struct FinalizeRequest {
+    local: u32,
+}
+
+#[derive(Debug, Deserialize)]
+struct FinalizeResponse {
+    data: Option<String>,
+    err: String,
+}
+
+impl<P> MediaSyncer<'_, P>
 where
     P: Fn(Progress) -> bool,
 {
-    fn new<'a>(mgr: &'a MediaManager, progress_cb: P, endpoint: &'a str) -> SyncContext<'a, P> {
+    pub fn new<'a>(mgr: &'a MediaManager, progress_cb: P, endpoint: &'a str) -> MediaSyncer<'a, P> {
         let client = Client::builder()
             .connect_timeout(time::Duration::from_secs(30))
             .build()
             .unwrap();
         let ctx = mgr.dbctx();
 
-        SyncContext {
+        MediaSyncer {
             mgr,
             ctx,
             skey: None,
@@ -70,6 +153,44 @@ where
         self.skey.as_ref().unwrap()
     }
 
+    #[allow(clippy::useless_let_if_seq)]
+    pub async fn sync(&mut self, hkey: &str) -> Result<()> {
+        // make sure media DB is up to date
+        register_changes(&mut self.ctx, self.mgr.media_folder.as_path())?;
+
+        let meta = self.ctx.get_meta()?;
+        let client_usn = meta.last_sync_usn;
+
+        debug!("beginning media sync");
+        let (sync_key, server_usn) = self.sync_begin(hkey).await?;
+        self.skey = Some(sync_key);
+        debug!("server usn was {}", server_usn);
+
+        let mut actions_performed = false;
+
+        // need to fetch changes from server?
+        if client_usn != server_usn {
+            debug!("differs from local usn {}, fetching changes", client_usn);
+            self.fetch_changes(meta).await?;
+            actions_performed = true;
+        }
+
+        // need to send changes to server?
+        let changes_pending = !self.ctx.get_pending_uploads(1)?.is_empty();
+        if changes_pending {
+            self.send_changes().await?;
+            actions_performed = true;
+        }
+
+        if actions_performed {
+            self.finalize_sync().await?;
+        }
+
+        debug!("media sync complete");
+
+        Ok(())
+    }
+
     async fn sync_begin(&self, hkey: &str) -> Result<(String, i32)> {
         let url = format!("{}begin", self.endpoint);
 
@@ -263,83 +384,6 @@ where
     }
 }
 
-#[allow(clippy::useless_let_if_seq)]
-pub async fn sync_media<F>(
-    mgr: &mut MediaManager,
-    hkey: &str,
-    progress_cb: F,
-    endpoint: &str,
-) -> Result<()>
-where
-    F: Fn(Progress) -> bool,
-{
-    let mut sctx = SyncContext::new(mgr, progress_cb, endpoint);
-
-    // make sure media DB is up to date
-    register_changes(&mut sctx.ctx, mgr.media_folder.as_path())?;
-
-    let meta = sctx.ctx.get_meta()?;
-    let client_usn = meta.last_sync_usn;
-
-    debug!("beginning media sync");
-    let (sync_key, server_usn) = sctx.sync_begin(hkey).await?;
-    sctx.skey = Some(sync_key);
-    debug!("server usn was {}", server_usn);
-
-    let mut actions_performed = false;
-
-    // need to fetch changes from server?
-    if client_usn != server_usn {
-        debug!("differs from local usn {}, fetching changes", client_usn);
-        sctx.fetch_changes(meta).await?;
-        actions_performed = true;
-    }
-
-    // need to send changes to server?
-    let changes_pending = !sctx.ctx.get_pending_uploads(1)?.is_empty();
-    if changes_pending {
-        sctx.send_changes().await?;
-        actions_performed = true;
-    }
-
-    if actions_performed {
-        sctx.finalize_sync().await?;
-    }
-
-    debug!("media sync complete");
-
-    Ok(())
-}
-
-#[derive(Debug, Deserialize)]
-struct SyncBeginResult {
-    data: Option<SyncBeginResponse>,
-    err: String,
-}
-
-#[derive(Debug, Deserialize)]
-struct SyncBeginResponse {
-    #[serde(rename = "sk")]
-    sync_key: String,
-    usn: i32,
-}
-
-#[derive(Debug, Clone, Copy)]
-enum LocalState {
-    NotInDB,
-    InDBNotPending,
-    InDBAndPending,
-}
-
-#[derive(PartialEq, Debug)]
-enum RequiredChange {
-    // no also covers the case where we'll later upload
-    None,
-    Download,
-    Delete,
-    RemovePending,
-}
-
 fn determine_required_change(
     local_sha1: &str,
     remote_sha1: &str,
@@ -419,25 +463,6 @@ fn determine_required_changes<'a>(
     Ok((to_download, to_delete, to_remove_pending))
 }
 
-#[derive(Debug, Serialize)]
-#[serde(rename_all = "camelCase")]
-struct RecordBatchRequest {
-    last_usn: i32,
-}
-
-#[derive(Debug, Deserialize)]
-struct RecordBatchResult {
-    data: Option<Vec<ServerMediaRecord>>,
-    err: String,
-}
-
-#[derive(Debug, Deserialize)]
-struct ServerMediaRecord {
-    fname: String,
-    usn: i32,
-    sha1: String,
-}
-
 async fn ankiweb_json_request<T>(
     client: &Client,
     url: &str,
@@ -483,12 +508,6 @@ async fn ankiweb_request(
         .map_err(Into::into)
 }
 
-#[derive(Debug, Serialize)]
-#[serde(rename_all = "camelCase")]
-struct ZipRequest<'a> {
-    files: &'a [&'a String],
-}
-
 fn extract_into_media_folder(media_folder: &Path, zip: Bytes) -> Result<Vec<AddedFile>> {
     let reader = io::Cursor::new(zip);
     let mut zip = zip::ZipArchive::new(reader)?;
@@ -586,24 +605,6 @@ fn record_clean(ctx: &mut MediaDatabaseContext, clean: &[&String]) -> Result<()>
     Ok(())
 }
 
-#[derive(Serialize_tuple)]
-struct UploadEntry<'a> {
-    fname: &'a str,
-    in_zip_name: Option<String>,
-}
-
-#[derive(Deserialize, Debug)]
-struct UploadResult {
-    data: Option<UploadReply>,
-    err: String,
-}
-
-#[derive(Deserialize, Debug)]
-struct UploadReply {
-    processed: usize,
-    current_usn: i32,
-}
-
 fn zip_files(media_folder: &Path, files: &[MediaEntry]) -> Result<Vec<u8>> {
     let buf = vec![];
 
@@ -681,21 +682,10 @@ fn media_check_required() -> AnkiError {
     }
 }
 
-#[derive(Serialize)]
-struct FinalizeRequest {
-    local: u32,
-}
-
-#[derive(Debug, Deserialize)]
-struct FinalizeResponse {
-    data: Option<String>,
-    err: String,
-}
-
 #[cfg(test)]
 mod test {
     use crate::err::Result;
-    use crate::media::sync::{determine_required_change, sync_media, LocalState, RequiredChange};
+    use crate::media::sync::{determine_required_change, LocalState, MediaSyncer, RequiredChange};
     use crate::media::MediaManager;
     use tempfile::tempdir;
     use tokio::runtime::Runtime;
@@ -715,7 +705,8 @@ mod test {
 
         let mut mgr = MediaManager::new(&media_dir, &media_db)?;
 
-        sync_media(&mut mgr, hkey, progress, "https://sync.ankiweb.net/msync/").await?;
+        let mut syncer = MediaSyncer::new(&mut mgr, progress, "https://sync.ankiweb.net/msync/");
+        syncer.sync(hkey).await?;
 
         Ok(())
     }