diff --git a/src/topic_mgr.rs b/src/topic_mgr.rs
index 712dd57..0b34631 100644
--- a/src/topic_mgr.rs
+++ b/src/topic_mgr.rs
@@ -122,8 +122,8 @@ impl TopicMgr {
 #[cfg(test)]
 mod tests {
     use tempfile::{TempDir};
-    use std::io::{Result};
     use crate::topic_mgr::{Topic, TopicMgr};
+    use crate::error::Result;
 
     pub fn create_temp_dir(prefix: &str) -> TempDir {
         tempfile::Builder::new().prefix(prefix).tempdir().unwrap()