diff --git a/clients/filesystem-fuse/src/gravitino_fileset_filesystem.rs b/clients/filesystem-fuse/src/gravitino_fileset_filesystem.rs
index ae703cd6a0a..79b098cd8ae 100644
--- a/clients/filesystem-fuse/src/gravitino_fileset_filesystem.rs
+++ b/clients/filesystem-fuse/src/gravitino_fileset_filesystem.rs
@@ -30,6 +30,8 @@ use std::path::{Path, PathBuf};
 pub(crate) struct GravitinoFilesetFileSystem {
     physical_fs: Box<dyn PathFileSystem>,
     client: GravitinoClient,
+    // target_path is a absolute path in the physical filesystem that is associated with the fileset.
+    // e.g. fileset location : s3://bucket/path/to/file the target_path is /path/to/file
     target_path: PathBuf,
 }
 
diff --git a/clients/filesystem-fuse/src/gvfs_creator.rs b/clients/filesystem-fuse/src/gvfs_creator.rs
index 4367b47e5de..aac88ad9d08 100644
--- a/clients/filesystem-fuse/src/gvfs_creator.rs
+++ b/clients/filesystem-fuse/src/gvfs_creator.rs
@@ -146,6 +146,7 @@ pub fn extract_filesystem_scheme(path: &str) -> GvfsResult<FileSystemSchema> {
 #[cfg(test)]
 mod tests {
     use crate::gvfs_creator::extract_fileset;
+    use crate::gvfs_fuse::FileSystemSchema;
 
     #[test]
     fn test_extract_fileset() {
@@ -155,4 +156,11 @@ mod tests {
         assert_eq!(schema, "s1");
         assert_eq!(fileset, "fileset1");
     }
+
+    #[test]
+    fn test_extract_schema() {
+        let location = "s3://bucket/path/to/file";
+        let schema = super::extract_filesystem_scheme(location).unwrap();
+        assert_eq!(schema, FileSystemSchema::S3);
+    }
 }
diff --git a/clients/filesystem-fuse/src/gvfs_fuse.rs b/clients/filesystem-fuse/src/gvfs_fuse.rs
index fa0e9f56487..88079e99b91 100644
--- a/clients/filesystem-fuse/src/gvfs_fuse.rs
+++ b/clients/filesystem-fuse/src/gvfs_fuse.rs
@@ -41,6 +41,7 @@ pub(crate) enum CreateFileSystemResult {
     None,
 }
 
+#[derive(Debug, PartialEq)]
 pub enum FileSystemSchema {
     S3,
 }