diff --git a/Cargo.lock b/Cargo.lock
index ba6351c..05db99b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -149,7 +149,7 @@ checksum = "5419bdc4f6a9207fbeba6d11b604d481addf78ecd10c11ad51e76c2f6482748d"
 
 [[package]]
 name = "icarus_models"
-version = "0.8.3"
+version = "0.8.4"
 dependencies = [
  "josekit",
  "rand",
diff --git a/Cargo.toml b/Cargo.toml
index 977b836..6211b23 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "icarus_models"
-version = "0.8.3"
+version = "0.8.4"
 edition = "2024"
 rust-version = "1.90"
 description = "models used for the icarus project"
diff --git a/src/coverart.rs b/src/coverart.rs
index fd60d71..c681291 100644
--- a/src/coverart.rs
+++ b/src/coverart.rs
@@ -1,11 +1,10 @@
 use std::io::Write;
 
 use rand::Rng;
-use serde::{Deserialize, Serialize};
 
 const FILENAME_LENGTH: i32 = 16;
 
-#[derive(Clone, Debug, Default, Deserialize, Serialize, utoipa::ToSchema)]
+#[derive(Clone, Debug, Default, serde::Deserialize, serde::Serialize, utoipa::ToSchema)]
 pub struct CoverArt {
     pub id: uuid::Uuid,
     pub title: String,
@@ -18,11 +17,9 @@ pub struct CoverArt {
 }
 
 pub mod init {
-    use super::CoverArt;
-
     /// Initializes the CoverArt with just the directory and filename
-    pub fn init_coverart_dir_and_filename(directory: &str, filename: &str) -> CoverArt {
-        CoverArt {
+    pub fn init_coverart_dir_and_filename(directory: &str, filename: &str) -> super::CoverArt {
+        super::CoverArt {
             directory: String::from(directory),
             filename: String::from(filename),
             ..Default::default()
@@ -88,7 +85,10 @@ impl CoverArt {
 }
 
 /// Generates filename for a CoverArt
-pub fn generate_filename(typ: crate::types::CoverArtTypes, randomize: bool) -> String {
+pub fn generate_filename(
+    typ: crate::types::CoverArtTypes,
+    randomize: bool,
+) -> Result<String, std::io::Error> {
     let file_extension = match typ {
         crate::types::CoverArtTypes::PngExtension => {
             String::from(crate::constants::file_extensions::image::PNGEXTENSION)
@@ -99,9 +99,12 @@ pub fn generate_filename(typ: crate::types::CoverArtTypes, randomize: bool) -> S
         crate::types::CoverArtTypes::JpgExtension => {
             String::from(crate::constants::file_extensions::image::JPGEXTENSION)
         }
+        crate::types::CoverArtTypes::None => {
+            return Err(std::io::Error::other("Unsupported CoverArtTypes"));
+        }
     };
 
-    if randomize {
+    let filename: String = if randomize {
         let mut filename: String = String::from("coverart-");
         let some_chars: String = String::from("abcdefghij0123456789");
         let some_chars_length = some_chars.len();
@@ -115,10 +118,12 @@ pub fn generate_filename(typ: crate::types::CoverArtTypes, randomize: bool) -> S
                 filename.push(c);
             }
         }
-        filename + &file_extension
+        format!("{filename}{file_extension}")
     } else {
-        "coverart-output".to_string() + &file_extension
-    }
+        format!("coverart-output{file_extension}")
+    };
+
+    Ok(filename)
 }
 
 pub mod io {
diff --git a/src/song.rs b/src/song.rs
index d81ceba..b333f7f 100644
--- a/src/song.rs
+++ b/src/song.rs
@@ -126,7 +126,10 @@ impl Song {
 }
 
 /// Generates a filename. In order to save a song to the filesystem
-pub fn generate_filename(typ: types::MusicTypes, randomize: bool) -> String {
+pub fn generate_filename(
+    typ: types::MusicTypes,
+    randomize: bool,
+) -> Result<String, std::io::Error> {
     let file_extension = match typ {
         types::MusicTypes::DefaultMusicExtension => {
             String::from(constants::file_extensions::audio::DEFAULTMUSICEXTENSION)
@@ -140,9 +143,10 @@ pub fn generate_filename(typ: types::MusicTypes, randomize: bool) -> String {
         types::MusicTypes::MPThreeExtension => {
             String::from(constants::file_extensions::audio::MPTHREEEXTENSION)
         }
+        types::MusicTypes::None => return Err(std::io::Error::other("Unsupported MusicTypes")),
     };
 
-    if randomize {
+    let filename: String = if randomize {
         let mut filename: String = String::from("track-");
         let some_chars: String = String::from("abcdefghij0123456789");
         let some_chars_length = some_chars.len();
@@ -156,10 +160,12 @@ pub fn generate_filename(typ: types::MusicTypes, randomize: bool) -> String {
                 filename.push(c);
             }
         }
-        filename + &file_extension
+        format!("{filename}{file_extension}")
     } else {
-        "track-output".to_string() + &file_extension
-    }
+        format!("track-output{file_extension}")
+    };
+
+    Ok(filename)
 }
 
 /// I/O operations for songs
diff --git a/src/types.rs b/src/types.rs
index f9e145f..7e88412 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -4,6 +4,7 @@ pub enum MusicTypes {
     WavExtension,
     FlacExtension,
     MPThreeExtension,
+    None,
 }
 
 #[derive(Debug)]
@@ -11,4 +12,5 @@ pub enum CoverArtTypes {
     PngExtension,
     JpegExtension,
     JpgExtension,
+    None,
 }
diff --git a/tests/tests.rs b/tests/tests.rs
index 386940b..5617b7d 100644
--- a/tests/tests.rs
+++ b/tests/tests.rs
@@ -107,12 +107,21 @@ mod song_tests {
         };
 
         assert_eq!(song.directory.is_empty(), false);
-        song_cpy.filename = song::generate_filename(types::MusicTypes::FlacExtension, true);
+        match song::generate_filename(types::MusicTypes::FlacExtension, true) {
+            Ok(filename) => {
+                song_cpy.filename = filename;
+            }
+            Err(err) => {
+                assert!(false, "Error generatig filename: {err:?}");
+            }
+        };
         println!("Directory: {:?}", song_cpy.directory);
         println!("File to be created: {:?}", song_cpy.filename);
 
         match song::io::copy_song(&song, &mut song_cpy) {
-            Ok(_) => {}
+            Ok(_) => {
+                println!("Song copied");
+            }
             Err(err) => {
                 assert!(false, "Error copying song: Error: {err:?}")
             }