diff --git a/src/lib.rs b/src/lib.rs
index 52cd075..d59f443 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -82,7 +82,7 @@ mod tests {
                 download_as_mp3: mock_network_download_as_mp3(tx),
             },
             file: FileEnv {
-                open: mock_file_open(vec![subs_file_name.clone()]),
+                open: mock_file_open(vec![subs_file_name.clone(), history_file_name.clone()]),
                 append_line: mock_file_append_line(),
             },
         };