diff --git a/codex-rs/app-server/tests/suite/v2/marketplace_add.rs b/codex-rs/app-server/tests/suite/v2/marketplace_add.rs
index 0e82a802b2cb..0f30629cf102 100644
--- a/codex-rs/app-server/tests/suite/v2/marketplace_add.rs
+++ b/codex-rs/app-server/tests/suite/v2/marketplace_add.rs
@@ -13,7 +13,7 @@ const DEFAULT_TIMEOUT: Duration = Duration::from_secs(10);
 #[tokio::test]
 async fn marketplace_add_local_directory_source() -> Result<()> {
     let codex_home = TempDir::new()?;
-    let source = codex_home.path().join("marketplace");
+    let source = codex_home.path().join("alice@example.com/marketplace");
     std::fs::create_dir_all(source.join(".agents/plugins"))?;
     std::fs::create_dir_all(source.join("plugins/sample/.codex-plugin"))?;
     std::fs::write(
@@ -33,7 +33,7 @@ async fn marketplace_add_local_directory_source() -> Result<()> {
 
     let request_id = mcp
         .send_marketplace_add_request(MarketplaceAddParams {
-            source: "./marketplace".to_string(),
+            source: "./alice@example.com/marketplace".to_string(),
             ref_name: None,
             sparse_paths: None,
         })
diff --git a/codex-rs/core-plugins/src/marketplace_add/source.rs b/codex-rs/core-plugins/src/marketplace_add/source.rs
index 6845129e5b28..043c6a3f7d2c 100644
--- a/codex-rs/core-plugins/src/marketplace_add/source.rs
+++ b/codex-rs/core-plugins/src/marketplace_add/source.rs
@@ -101,7 +101,8 @@ fn split_source_ref(source: &str) -> (String, Option<String>) {
     if let Some((base, ref_name)) = source.rsplit_once('#') {
         return (base.to_string(), non_empty_ref(ref_name));
     }
-    if !source.contains("://")
+    if !looks_like_local_path(source)
+        && !source.contains("://")
         && !is_ssh_git_url(source)
         && let Some((base, ref_name)) = source.rsplit_once('@')
     {