diff --git a/src/options/level_tuning.rs b/src/options/level_tuning.rs
index a275ebe5..0281cb99 100644
--- a/src/options/level_tuning.rs
+++ b/src/options/level_tuning.rs
@@ -83,6 +83,7 @@ impl LevelTuning {
                 };
 
                 file.write_all(content.as_bytes()).unwrap();
+                file.flush().unwrap();
                 println!(
                     "level: {} -> {}",
                     rule["level"].as_str().unwrap(),
@@ -145,7 +146,7 @@ mod tests {
         level: high
         "#;
 
-        let path = "test_files/rules/level_tuning_sample.yml";
+        let path = "test_files/rules/level_tuning.txt";
         let mut file = File::create(path).unwrap();
         let buf = rule_str.as_bytes();
         file.write_all(buf).unwrap();
diff --git a/test_files/config/level_tuning.txt b/test_files/config/level_tuning.txt
new file mode 100644
index 00000000..58a9604a
--- /dev/null
+++ b/test_files/config/level_tuning.txt
@@ -0,0 +1,2 @@
+id,next_level
+12345678-1234-1234-1234-123456789012,high
\ No newline at end of file