diff --git a/src/lib.rs b/src/lib.rs
index 760bc34..4002b47 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1111,7 +1111,7 @@ mod tests {
     fn artist_new_delete() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         let mut expected: Vec<Artist> = vec![];
 
@@ -1133,7 +1133,7 @@ mod tests {
     #[test]
     fn collection_error() {
         let artist_id = ArtistId::new("an artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         let actual_err = music_hoard
             .add_musicbrainz_url(&artist_id, QOBUZ)
@@ -1148,7 +1148,7 @@ mod tests {
     fn add_remove_musicbrainz_url() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         music_hoard.add_artist(artist_id.clone());
 
@@ -1219,7 +1219,7 @@ mod tests {
     fn set_clear_musicbrainz_url() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         music_hoard.add_artist(artist_id.clone());
 
@@ -1274,7 +1274,7 @@ mod tests {
     fn add_remove_musicbutler_urls() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         music_hoard.add_artist(artist_id.clone());
 
@@ -1404,7 +1404,7 @@ mod tests {
     fn set_clear_musicbutler_urls() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         music_hoard.add_artist(artist_id.clone());
 
@@ -1467,7 +1467,7 @@ mod tests {
     fn add_remove_bandcamp_urls() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         music_hoard.add_artist(artist_id.clone());
 
@@ -1597,7 +1597,7 @@ mod tests {
     fn set_clear_bandcamp_urls() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         music_hoard.add_artist(artist_id.clone());
 
@@ -1660,7 +1660,7 @@ mod tests {
     fn add_remove_qobuz_url() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         music_hoard.add_artist(artist_id.clone());
 
@@ -1711,7 +1711,7 @@ mod tests {
     fn set_clear_qobuz_url() {
         let artist_id = ArtistId::new("an artist");
         let artist_id_2 = ArtistId::new("another artist");
-        let mut music_hoard = MusicHoardBuilder::new().build();
+        let mut music_hoard = MusicHoardBuilder::default().build();
 
         music_hoard.add_artist(artist_id.clone());
 
@@ -1850,7 +1850,7 @@ mod tests {
         let mut expected = COLLECTION.to_owned();
         expected.sort_unstable();
 
-        let merged = MusicHoard::<MockILibrary, MockIDatabase>::merge(left.clone(), right);
+        let merged = MusicHoard::<NoLibrary, NoDatabase>::merge(left.clone(), right);
         assert_eq!(expected, merged);
     }
 
@@ -1864,7 +1864,7 @@ mod tests {
         let mut expected = COLLECTION.to_owned();
         expected.sort_unstable();
 
-        let merged = MusicHoard::<MockILibrary, MockIDatabase>::merge(left.clone(), right);
+        let merged = MusicHoard::<NoLibrary, NoDatabase>::merge(left.clone(), right);
         assert_eq!(expected, merged);
     }
 
@@ -1882,7 +1882,10 @@ mod tests {
             .times(1)
             .return_once(|_| library_result);
 
-        let mut music_hoard = MusicHoard::new(library, database);
+        let mut music_hoard = MusicHoardBuilder::default()
+            .set_library(library)
+            .set_database(database)
+            .build();
 
         music_hoard.rescan_library().unwrap();
         assert_eq!(
@@ -1909,7 +1912,10 @@ mod tests {
             .times(1)
             .return_once(|_| library_result);
 
-        let mut music_hoard = MusicHoard::new(library, database);
+        let mut music_hoard = MusicHoardBuilder::default()
+            .set_library(library)
+            .set_database(database)
+            .build();
 
         music_hoard.rescan_library().unwrap();
         assert_eq!(
@@ -1936,7 +1942,10 @@ mod tests {
             .times(1)
             .return_once(|_| library_result);
 
-        let mut music_hoard = MusicHoard::new(library, database);
+        let mut music_hoard = MusicHoardBuilder::default()
+            .set_library(library)
+            .set_database(database)
+            .build();
 
         music_hoard.rescan_library().unwrap();
         assert_eq!(music_hoard.get_collection(), &expected);
@@ -1955,7 +1964,10 @@ mod tests {
                 Ok(())
             });
 
-        let mut music_hoard = MusicHoard::new(library, database);
+        let mut music_hoard = MusicHoardBuilder::default()
+            .set_library(library)
+            .set_database(database)
+            .build();
 
         music_hoard.load_from_database().unwrap();
         assert_eq!(music_hoard.get_collection(), &*COLLECTION);
@@ -1984,7 +1996,10 @@ mod tests {
             .times(1)
             .return_once(|_: &Collection| database_result);
 
-        let mut music_hoard = MusicHoard::new(library, database);
+        let mut music_hoard = MusicHoardBuilder::default()
+            .set_library(library)
+            .set_database(database)
+            .build();
 
         music_hoard.rescan_library().unwrap();
         assert_eq!(
@@ -2006,7 +2021,10 @@ mod tests {
             .times(1)
             .return_once(|_| library_result);
 
-        let mut music_hoard = MusicHoard::new(library, database);
+        let mut music_hoard = MusicHoardBuilder::default()
+            .set_library(library)
+            .set_database(database)
+            .build();
 
         let actual_err = music_hoard.rescan_library().unwrap_err();
         let expected_err =
@@ -2028,7 +2046,10 @@ mod tests {
             .times(1)
             .return_once(|_: &mut Collection| database_result);
 
-        let mut music_hoard = MusicHoard::new(library, database);
+        let mut music_hoard = MusicHoardBuilder::default()
+            .set_library(library)
+            .set_database(database)
+            .build();
 
         let actual_err = music_hoard.load_from_database().unwrap_err();
         let expected_err = Error::DatabaseError(
@@ -2051,7 +2072,10 @@ mod tests {
             .times(1)
             .return_once(|_: &Collection| database_result);
 
-        let mut music_hoard = MusicHoard::new(library, database);
+        let mut music_hoard = MusicHoardBuilder::default()
+            .set_library(library)
+            .set_database(database)
+            .build();
 
         let actual_err = music_hoard.save_to_database().unwrap_err();
         let expected_err = Error::DatabaseError(