diff --git a/Kyoo.Common/Controllers/IRepository.cs b/Kyoo.Common/Controllers/IRepository.cs
index 3db8d475..352ebe04 100644
--- a/Kyoo.Common/Controllers/IRepository.cs
+++ b/Kyoo.Common/Controllers/IRepository.cs
@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Linq.Expressions;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
@@ -242,49 +241,13 @@ namespace Kyoo.Controllers
 		/// <param name="obj">The resource to delete</param>
 		/// <exception cref="ItemNotFoundException">If the item is not found</exception>
 		Task Delete([NotNull] T obj);
-
+		
 		/// <summary>
-		/// Delete a list of resources.
-		/// </summary>
-		/// <param name="objs">One or multiple resources to delete</param>
-		/// <exception cref="ItemNotFoundException">If the item is not found</exception>
-		Task DeleteRange(params T[] objs) => DeleteRange(objs.AsEnumerable());
-		/// <summary>
-		/// Delete a list of resources.
-		/// </summary>
-		/// <param name="objs">An enumerable of resources to delete</param>
-		/// <exception cref="ItemNotFoundException">If the item is not found</exception>
-		Task DeleteRange(IEnumerable<T> objs);
-		/// <summary>
-		/// Delete a list of resources.
-		/// </summary>
-		/// <param name="ids">One or multiple resource's id</param>
-		/// <exception cref="ItemNotFoundException">If the item is not found</exception>
-		Task DeleteRange(params int[] ids) => DeleteRange(ids.AsEnumerable());
-		/// <summary>
-		/// Delete a list of resources.
-		/// </summary>
-		/// <param name="ids">An enumerable of resource's id</param>
-		/// <exception cref="ItemNotFoundException">If the item is not found</exception>
-		Task DeleteRange(IEnumerable<int> ids);
-		/// <summary>
-		/// Delete a list of resources.
-		/// </summary>
-		/// <param name="slugs">One or multiple resource's slug</param>
-		/// <exception cref="ItemNotFoundException">If the item is not found</exception>
-		Task DeleteRange(params string[] slugs) => DeleteRange(slugs.AsEnumerable());
-		/// <summary>
-		/// Delete a list of resources.
-		/// </summary>
-		/// <param name="slugs">An enumerable of resource's slug</param>
-		/// <exception cref="ItemNotFoundException">If the item is not found</exception>
-		Task DeleteRange(IEnumerable<string> slugs);
-		/// <summary>
-		/// Delete a list of resources.
+		/// Delete all resources that match the predicate.
 		/// </summary>
 		/// <param name="where">A predicate to filter resources to delete. Every resource that match this will be deleted.</param>
 		/// <exception cref="ItemNotFoundException">If the item is not found</exception>
-		Task DeleteRange([NotNull] Expression<Func<T, bool>> where);
+		Task DeleteAll([NotNull] Expression<Func<T, bool>> where);
 	}
 
 	/// <summary>
diff --git a/Kyoo.CommonAPI/CrudApi.cs b/Kyoo.CommonAPI/CrudApi.cs
index b6d03580..336d3226 100644
--- a/Kyoo.CommonAPI/CrudApi.cs
+++ b/Kyoo.CommonAPI/CrudApi.cs
@@ -194,7 +194,7 @@ namespace Kyoo.CommonApi
 		{
 			try
 			{
-				await _repository.DeleteRange(ApiHelper.ParseWhere<T>(where));
+				await _repository.DeleteAll(ApiHelper.ParseWhere<T>(where));
 			}
 			catch (ItemNotFoundException)
 			{
diff --git a/Kyoo.CommonAPI/LocalRepository.cs b/Kyoo.CommonAPI/LocalRepository.cs
index 42653843..9c23c774 100644
--- a/Kyoo.CommonAPI/LocalRepository.cs
+++ b/Kyoo.CommonAPI/LocalRepository.cs
@@ -295,31 +295,10 @@ namespace Kyoo.Controllers
 		public abstract Task Delete(T obj);
 		
 		/// <inheritdoc/>
-		public virtual async Task DeleteRange(IEnumerable<T> objs)
+		public async Task DeleteAll(Expression<Func<T, bool>> where)
 		{
-			foreach (T obj in objs)
-				await Delete(obj);
-		}
-		
-		/// <inheritdoc/>
-		public virtual async Task DeleteRange(IEnumerable<int> ids)
-		{
-			foreach (int id in ids)
-				await Delete(id);
-		}
-		
-		/// <inheritdoc/>
-		public virtual async Task DeleteRange(IEnumerable<string> slugs)
-		{
-			foreach (string slug in slugs)
-				await Delete(slug);
-		}
-		
-		/// <inheritdoc/>
-		public async Task DeleteRange(Expression<Func<T, bool>> where)
-		{
-			ICollection<T> resources = await GetAll(where);
-			await DeleteRange(resources);
+			foreach (T resource in await GetAll(where))
+				await Delete(resource);
 		}
 	}
 }
\ No newline at end of file
diff --git a/Kyoo.Tests/Library/RepositoryActivator.cs b/Kyoo.Tests/Library/RepositoryActivator.cs
index 42468a49..7352a781 100644
--- a/Kyoo.Tests/Library/RepositoryActivator.cs
+++ b/Kyoo.Tests/Library/RepositoryActivator.cs
@@ -25,8 +25,7 @@ namespace Kyoo.Tests
 			PeopleRepository people = new(_database, provider, 
 				new Lazy<IShowRepository>(() => LibraryManager.ShowRepository));
 			ShowRepository show = new(_database, studio, people, genre, provider);
-			SeasonRepository season = new(_database, provider, show, 
-				new Lazy<IEpisodeRepository>(() => LibraryManager.EpisodeRepository));
+			SeasonRepository season = new(_database, provider, show);
 			LibraryItemRepository libraryItem = new(_database, 
 				new Lazy<ILibraryRepository>(() => LibraryManager.LibraryRepository),
 				new Lazy<IShowRepository>(() => LibraryManager.ShowRepository),
diff --git a/Kyoo.Tests/Library/RepositoryTests.cs b/Kyoo.Tests/Library/RepositoryTests.cs
index e8504a16..82482bc7 100644
--- a/Kyoo.Tests/Library/RepositoryTests.cs
+++ b/Kyoo.Tests/Library/RepositoryTests.cs
@@ -1,4 +1,7 @@
+using System;
+using System.Collections.Generic;
 using System.Linq;
+using System.Linq.Expressions;
 using System.Threading.Tasks;
 using Kyoo.Controllers;
 using Kyoo.Models;
@@ -8,7 +11,7 @@ using Xunit;
 namespace Kyoo.Tests
 {
 	public abstract class RepositoryTests<T>
-		where T : class, IResource
+		where T : class, IResource, new()
 	{
 		protected readonly RepositoryActivator Repositories;
 		private readonly IRepository<T> _repository;
@@ -86,5 +89,94 @@ namespace Kyoo.Tests
 			await _repository.Create(expected);
 			KAssert.DeepEqual(expected, await _repository.Get(expected.Slug));
 		}
+		
+		[Fact]
+		public async Task CreateNullTest()
+		{
+			await Assert.ThrowsAsync<ArgumentNullException>(() => _repository.Create(null!));
+		}
+		
+		[Fact]
+		public async Task CreateIfNotExistNullTest()
+		{
+			await Assert.ThrowsAsync<ArgumentNullException>(() => _repository.CreateIfNotExists(null!));
+		}
+		
+		[Fact]
+		public async Task CreateIfNotExistTest()
+		{
+			T expected = TestSample.Get<T>();
+			KAssert.DeepEqual(expected, await _repository.CreateIfNotExists(TestSample.Get<T>()));
+			await _repository.Delete(TestSample.Get<T>());
+			KAssert.DeepEqual(expected, await _repository.CreateIfNotExists(TestSample.Get<T>()));
+		}
+		
+		[Fact]
+		public async Task EditNullTest()
+		{
+			await Assert.ThrowsAsync<ArgumentNullException>(() => _repository.Edit(null!, false));
+		}
+		
+		[Fact]
+		public async Task EditNonExistingTest()
+		{
+			await Assert.ThrowsAsync<ItemNotFoundException>(() => _repository.Edit(new T {ID = 56}, false));
+		}
+
+		[Fact]
+		public async Task GetExpressionIDTest()
+		{
+			KAssert.DeepEqual(TestSample.Get<T>(), await _repository.Get(x => x.ID == TestSample.Get<T>().ID));
+		}
+
+		[Fact]
+		public async Task GetExpressionSlugTest()
+		{
+			KAssert.DeepEqual(TestSample.Get<T>(), await _repository.Get(x => x.Slug == TestSample.Get<T>().Slug));
+		}
+		
+		[Fact]
+		public async Task GetExpressionNotFoundTest()
+		{
+			await Assert.ThrowsAsync<ItemNotFoundException>(() => _repository.Get(x => x.Slug == "non-existing"));
+		}
+		
+		[Fact]
+		public async Task GetExpressionNullTest()
+		{
+			await Assert.ThrowsAsync<ArgumentNullException>(() => _repository.Get((Expression<Func<T, bool>>)null!));
+		}
+		
+		[Fact]
+		public async Task GetOrDefaultTest()
+		{
+			Assert.Null(await _repository.GetOrDefault(56));
+			Assert.Null(await _repository.GetOrDefault("non-existing"));
+			Assert.Null(await _repository.GetOrDefault(x => x.Slug == "non-existing"));
+		}
+
+		[Fact]
+		public async Task GetCountWithFilterTest()
+		{
+			string slug = TestSample.Get<T>().Slug[2..4];
+			Assert.Equal(1, await _repository.GetCount(x => x.Slug.Contains(slug)));
+		}
+		
+		[Fact]
+		public async Task GetAllTest()
+		{
+			string slug = TestSample.Get<T>().Slug[2..4];
+			ICollection<T> ret = await _repository.GetAll(x => x.Slug.Contains(slug));
+			Assert.Equal(1, ret.Count);
+			KAssert.DeepEqual(TestSample.Get<T>(), ret.First());
+		}
+		
+		[Fact]
+		public async Task DeleteAllTest()
+		{
+			string slug = TestSample.Get<T>().Slug[2..4];
+			await _repository.DeleteAll(x => x.Slug.Contains(slug));
+			Assert.Equal(0, await _repository.GetCount());
+		}
 	}
 }
\ No newline at end of file
diff --git a/Kyoo.Tests/Library/SpecificTests/ShowTests.cs b/Kyoo.Tests/Library/SpecificTests/ShowTests.cs
index c49ca824..183780aa 100644
--- a/Kyoo.Tests/Library/SpecificTests/ShowTests.cs
+++ b/Kyoo.Tests/Library/SpecificTests/ShowTests.cs
@@ -216,5 +216,22 @@ namespace Kyoo.Tests.SpecificTests
 			Show created = await _repository.Create(expected);
 			KAssert.DeepEqual(expected, created);
 		}
+
+		[Fact]
+		public async Task SlugDuplicationTest()
+		{
+			Show test = TestSample.Get<Show>();
+			test.ID = 0;
+			test.Slug = "300";
+			Show created = await _repository.Create(test);
+			Assert.Equal("300!", created.Slug);
+		}
+		
+		[Fact]
+		public async Task GetSlugTest()
+		{
+			Show reference = TestSample.Get<Show>();
+			Assert.Equal(reference.Slug, await _repository.GetSlug(reference.ID));
+		}
 	}
 }
\ No newline at end of file
diff --git a/Kyoo/Controllers/Repositories/EpisodeRepository.cs b/Kyoo/Controllers/Repositories/EpisodeRepository.cs
index 46c8d62c..e6765c13 100644
--- a/Kyoo/Controllers/Repositories/EpisodeRepository.cs
+++ b/Kyoo/Controllers/Repositories/EpisodeRepository.cs
@@ -195,7 +195,7 @@ namespace Kyoo.Controllers
 			
 			if (changed.Tracks != null || resetOld)
 			{
-				await _tracks.DeleteRange(x => x.EpisodeID == resource.ID);
+				await _tracks.DeleteAll(x => x.EpisodeID == resource.ID);
 				resource.Tracks = changed.Tracks;
 				await ValidateTracks(resource);
 			}
diff --git a/Kyoo/Controllers/Repositories/SeasonRepository.cs b/Kyoo/Controllers/Repositories/SeasonRepository.cs
index 1f31ace7..ad3d5064 100644
--- a/Kyoo/Controllers/Repositories/SeasonRepository.cs
+++ b/Kyoo/Controllers/Repositories/SeasonRepository.cs
@@ -27,11 +27,7 @@ namespace Kyoo.Controllers
 		/// A show repository to get show's slug from their ID and keep the slug in each episode.
 		/// </summary>
 		private readonly IShowRepository _shows;
-		/// <summary>
-		/// A lazilly loaded episode repository to handle deletion of episodes with the season.
-		/// </summary>
-		private readonly Lazy<IEpisodeRepository> _episodes;
-		
+
 		/// <inheritdoc/>
 		protected override Expression<Func<Season, object>> DefaultSort => x => x.SeasonNumber;
 
@@ -43,17 +39,14 @@ namespace Kyoo.Controllers
 		/// <param name="database">The database handle that will be used</param>
 		/// <param name="providers">A provider repository</param>
 		/// <param name="shows">A show repository</param>
-		/// <param name="episodes">A lazy loaded episode repository.</param>
 		public SeasonRepository(DatabaseContext database,
 			IProviderRepository providers,
-			IShowRepository shows,
-			Lazy<IEpisodeRepository> episodes)
+			IShowRepository shows)
 			: base(database)
 		{
 			_database = database;
 			_providers = providers;
 			_shows = shows;
-			_episodes = episodes;
 		}
 		
 
@@ -186,9 +179,9 @@ namespace Kyoo.Controllers
 			_database.Entry(obj).State = EntityState.Deleted;
 			obj.ExternalIDs.ForEach(x => _database.Entry(x).State = EntityState.Deleted);
 			await _database.SaveChangesAsync();
-
-			if (obj.Episodes != null)
-				await _episodes.Value.DeleteRange(obj.Episodes);
+			//
+			// if (obj.Episodes != null)
+			// 	await _episodes.Value.DeleteRange(obj.Episodes);
 		}
 	}
 }
\ No newline at end of file