diff --git a/deploy/serval/templates/alert-manager-config.yaml b/deploy/serval/templates/alert-manager-config.yaml
index 2fe6887a..3a675faf 100644
--- a/deploy/serval/templates/alert-manager-config.yaml
+++ b/deploy/serval/templates/alert-manager-config.yaml
@@ -13,7 +13,7 @@ spec:
           from: {{ .Values.alertEmail }}
           requireTLS: true
           sendResolved: true
-          smarthost: mail.languagetechnology.org:587
+          smarthost: smtppro.zoho.com:587
           tlsConfig: {}
           to: {{ .Values.emailsToAlert }}
       name: alert-serval
diff --git a/src/Serval/src/Serval.Shared/Models/IInitializableEntity.cs b/src/Serval/src/Serval.Shared/Models/IInitializableEntity.cs
new file mode 100644
index 00000000..cef5c884
--- /dev/null
+++ b/src/Serval/src/Serval.Shared/Models/IInitializableEntity.cs
@@ -0,0 +1,7 @@
+namespace Serval.Shared.Models;
+
+public interface IInitializableEntity : IEntity
+{
+    bool? IsInitialized { get; set; }
+    DateTime? DateCreated { get; set; }
+}
diff --git a/src/Serval/src/Serval.Shared/Services/EntityServiceBase.cs b/src/Serval/src/Serval.Shared/Services/EntityServiceBase.cs
index e506b402..b46aa87f 100644
--- a/src/Serval/src/Serval.Shared/Services/EntityServiceBase.cs
+++ b/src/Serval/src/Serval.Shared/Services/EntityServiceBase.cs
@@ -5,7 +5,7 @@ public abstract class EntityServiceBase<T>(IRepository<T> entities)
 {
     protected IRepository<T> Entities { get; } = entities;
 
-    public async Task<T> GetAsync(string id, CancellationToken cancellationToken = default)
+    public virtual async Task<T> GetAsync(string id, CancellationToken cancellationToken = default)
     {
         T? entity = await Entities.GetAsync(id, cancellationToken);
         if (entity is null)
diff --git a/src/Serval/src/Serval.Shared/Services/UnitializedEntityCleanupService.cs b/src/Serval/src/Serval.Shared/Services/UnitializedEntityCleanupService.cs
new file mode 100644
index 00000000..2dc54e93
--- /dev/null
+++ b/src/Serval/src/Serval.Shared/Services/UnitializedEntityCleanupService.cs
@@ -0,0 +1,55 @@
+using Microsoft.Extensions.DependencyInjection;
+using SIL.ServiceToolkit.Services;
+
+namespace Serval.Shared.Services;
+
+public abstract class UninitializedCleanupService<T>(
+    IServiceProvider services,
+    ILogger<UninitializedCleanupService<T>> logger,
+    TimeSpan? timeout = null
+) : RecurrentTask($"{typeof(T)} Cleanup Service", services, RefreshPeriod, logger)
+    where T : IInitializableEntity
+{
+    private readonly ILogger<UninitializedCleanupService<T>> _logger = logger;
+    private readonly TimeSpan _timeout = timeout ?? TimeSpan.FromMinutes(2);
+    private static readonly TimeSpan RefreshPeriod = TimeSpan.FromDays(1);
+
+    protected override async Task DoWorkAsync(IServiceScope scope, CancellationToken cancellationToken)
+    {
+        _logger.LogInformation("Running build cleanup job");
+        var entities = scope.ServiceProvider.GetRequiredService<IRepository<T>>();
+        await CheckEntitiesAsync(entities, cancellationToken);
+    }
+
+    public async Task CheckEntitiesAsync(IRepository<T> entities, CancellationToken cancellationToken)
+    {
+        var now = DateTime.UtcNow;
+        IEnumerable<T> uninitializedEntities = await entities.GetAllAsync(
+            e =>
+                e.DateCreated != null
+                && e.DateCreated < now - _timeout
+                && e.IsInitialized != null
+                && !e.IsInitialized.Value,
+            cancellationToken
+        );
+
+        foreach (T entity in uninitializedEntities)
+        {
+            _logger.LogInformation(
+                "Deleting {type} {id} because it was never successfully initialized.",
+                typeof(T),
+                entity.Id
+            );
+            await DeleteEntityAsync(entities, entity, cancellationToken);
+        }
+    }
+
+    protected virtual async Task DeleteEntityAsync(
+        IRepository<T> entities,
+        T entity,
+        CancellationToken cancellationToken
+    )
+    {
+        await entities.DeleteAsync(e => e.Id == entity.Id, cancellationToken);
+    }
+}
diff --git a/src/Serval/src/Serval.Translation/Configuration/IMongoDataAccessConfiguratorExtensions.cs b/src/Serval/src/Serval.Translation/Configuration/IMongoDataAccessConfiguratorExtensions.cs
index ea016c0e..d0092c0b 100644
--- a/src/Serval/src/Serval.Translation/Configuration/IMongoDataAccessConfiguratorExtensions.cs
+++ b/src/Serval/src/Serval.Translation/Configuration/IMongoDataAccessConfiguratorExtensions.cs
@@ -15,14 +15,22 @@ this IMongoDataAccessConfigurator configurator
                 await c.Indexes.CreateOrUpdateAsync(
                     new CreateIndexModel<Engine>(Builders<Engine>.IndexKeys.Ascending(e => e.Owner))
                 );
+                await c.Indexes.CreateOrUpdateAsync(
+                    new CreateIndexModel<Engine>(Builders<Engine>.IndexKeys.Ascending(e => e.DateCreated))
+                );
             }
         );
         configurator.AddRepository<Build>(
             "translation.builds",
-            init: c =>
-                c.Indexes.CreateOrUpdateAsync(
+            init: async c =>
+            {
+                await c.Indexes.CreateOrUpdateAsync(
                     new CreateIndexModel<Build>(Builders<Build>.IndexKeys.Ascending(b => b.EngineRef))
-                )
+                );
+                await c.Indexes.CreateOrUpdateAsync(
+                    new CreateIndexModel<Build>(Builders<Build>.IndexKeys.Ascending(b => b.DateCreated))
+                );
+            }
         );
         configurator.AddRepository<Pretranslation>(
             "translation.pretranslations",
diff --git a/src/Serval/src/Serval.Translation/Configuration/IServalBuilderExtensions.cs b/src/Serval/src/Serval.Translation/Configuration/IServalBuilderExtensions.cs
index 4e329863..2788ed49 100644
--- a/src/Serval/src/Serval.Translation/Configuration/IServalBuilderExtensions.cs
+++ b/src/Serval/src/Serval.Translation/Configuration/IServalBuilderExtensions.cs
@@ -14,6 +14,9 @@ public static IServalBuilder AddTranslation(this IServalBuilder builder)
         builder.Services.AddScoped<IPretranslationService, PretranslationService>();
         builder.Services.AddScoped<IEngineService, EngineService>();
 
+        builder.Services.AddSingleton<EngineCleanupService>();
+        builder.Services.AddSingleton<BuildCleanupService>();
+
         var translationOptions = new TranslationOptions();
         builder.Configuration.GetSection(TranslationOptions.Key).Bind(translationOptions);
 
diff --git a/src/Serval/src/Serval.Translation/Controllers/TranslationEnginesController.cs b/src/Serval/src/Serval.Translation/Controllers/TranslationEnginesController.cs
index 6a84ea86..e379fc75 100644
--- a/src/Serval/src/Serval.Translation/Controllers/TranslationEnginesController.cs
+++ b/src/Serval/src/Serval.Translation/Controllers/TranslationEnginesController.cs
@@ -1320,7 +1320,8 @@ private Engine Map(TranslationEngineConfigDto source)
             Type = source.Type.ToPascalCase(),
             Owner = Owner,
             Corpora = [],
-            IsModelPersisted = source.IsModelPersisted
+            IsModelPersisted = source.IsModelPersisted,
+            IsInitialized = false
         };
     }
 
@@ -1333,7 +1334,8 @@ private static Build Map(Engine engine, TranslationBuildConfigDto source, string
             Pretranslate = Map(engine, source.Pretranslate),
             TrainOn = Map(engine, source.TrainOn),
             Options = Map(source.Options),
-            DeploymentVersion = deploymentVersion
+            DeploymentVersion = deploymentVersion,
+            IsInitialized = false
         };
     }
 
diff --git a/src/Serval/src/Serval.Translation/Models/Build.cs b/src/Serval/src/Serval.Translation/Models/Build.cs
index a4f20390..04f15fdd 100644
--- a/src/Serval/src/Serval.Translation/Models/Build.cs
+++ b/src/Serval/src/Serval.Translation/Models/Build.cs
@@ -1,6 +1,6 @@
 namespace Serval.Translation.Models;
 
-public record Build : IEntity
+public record Build : IInitializableEntity
 {
     public string Id { get; set; } = "";
     public int Revision { get; set; } = 1;
@@ -13,9 +13,10 @@ public record Build : IEntity
     public string? Message { get; init; }
     public int? QueueDepth { get; init; }
     public JobState State { get; init; } = JobState.Pending;
-    public DateTime DateCreated { get; init; } = DateTime.UtcNow;
     public DateTime? DateFinished { get; init; }
     public IReadOnlyDictionary<string, object>? Options { get; init; }
     public string? DeploymentVersion { get; init; }
     public IReadOnlyDictionary<string, string> ExecutionData { get; init; } = new Dictionary<string, string>();
+    public bool? IsInitialized { get; set; }
+    public DateTime? DateCreated { get; set; }
 }
diff --git a/src/Serval/src/Serval.Translation/Models/Engine.cs b/src/Serval/src/Serval.Translation/Models/Engine.cs
index b4d0f55b..df8fd26b 100644
--- a/src/Serval/src/Serval.Translation/Models/Engine.cs
+++ b/src/Serval/src/Serval.Translation/Models/Engine.cs
@@ -1,6 +1,6 @@
 namespace Serval.Translation.Models;
 
-public record Engine : IOwnedEntity
+public record Engine : IOwnedEntity, IInitializableEntity
 {
     public string Id { get; set; } = "";
     public int Revision { get; set; } = 1;
@@ -16,4 +16,6 @@ public record Engine : IOwnedEntity
     public int ModelRevision { get; init; }
     public double Confidence { get; init; }
     public int CorpusSize { get; init; }
+    public bool? IsInitialized { get; set; }
+    public DateTime? DateCreated { get; set; }
 }
diff --git a/src/Serval/src/Serval.Translation/Services/BuildCleanupService.cs b/src/Serval/src/Serval.Translation/Services/BuildCleanupService.cs
new file mode 100644
index 00000000..f8fa99b9
--- /dev/null
+++ b/src/Serval/src/Serval.Translation/Services/BuildCleanupService.cs
@@ -0,0 +1,7 @@
+namespace Serval.Translation.Services;
+
+public class BuildCleanupService(
+    IServiceProvider services,
+    ILogger<BuildCleanupService> logger,
+    TimeSpan? timeout = null
+) : UninitializedCleanupService<Build>(services, logger, timeout) { }
diff --git a/src/Serval/src/Serval.Translation/Services/BuildService.cs b/src/Serval/src/Serval.Translation/Services/BuildService.cs
index e3d652d3..85b50909 100644
--- a/src/Serval/src/Serval.Translation/Services/BuildService.cs
+++ b/src/Serval/src/Serval.Translation/Services/BuildService.cs
@@ -4,13 +4,30 @@ public class BuildService(IRepository<Build> builds) : EntityServiceBase<Build>(
 {
     public async Task<IEnumerable<Build>> GetAllAsync(string parentId, CancellationToken cancellationToken = default)
     {
-        return await Entities.GetAllAsync(e => e.EngineRef == parentId, cancellationToken);
+        return await Entities.GetAllAsync(
+            e => e.EngineRef == parentId && (e.IsInitialized == null || e.IsInitialized.Value),
+            cancellationToken
+        );
+    }
+
+    public override async Task<Build> GetAsync(string id, CancellationToken cancellationToken = default)
+    {
+        Build? build = await Entities.GetAsync(
+            e => e.Id == id && (e.IsInitialized == null || e.IsInitialized.Value),
+            cancellationToken
+        );
+        if (build == null)
+            throw new EntityNotFoundException($"Could not find the {typeof(Build).Name} '{id}'.");
+        return build;
     }
 
     public Task<Build?> GetActiveAsync(string parentId, CancellationToken cancellationToken = default)
     {
         return Entities.GetAsync(
-            b => b.EngineRef == parentId && (b.State == JobState.Active || b.State == JobState.Pending),
+            b =>
+                b.EngineRef == parentId
+                && (b.IsInitialized == null || b.IsInitialized.Value)
+                && (b.State == JobState.Active || b.State == JobState.Pending),
             cancellationToken
         );
     }
@@ -21,7 +38,11 @@ public Task<EntityChange<Build>> GetNewerRevisionAsync(
         CancellationToken cancellationToken = default
     )
     {
-        return GetNewerRevisionAsync(e => e.Id == id, minRevision, cancellationToken);
+        return GetNewerRevisionAsync(
+            e => e.Id == id && (e.IsInitialized == null || e.IsInitialized.Value),
+            minRevision,
+            cancellationToken
+        );
     }
 
     public Task<EntityChange<Build>> GetActiveNewerRevisionAsync(
@@ -31,7 +52,10 @@ public Task<EntityChange<Build>> GetActiveNewerRevisionAsync(
     )
     {
         return GetNewerRevisionAsync(
-            b => b.EngineRef == parentId && (b.State == JobState.Active || b.State == JobState.Pending),
+            b =>
+                b.EngineRef == parentId
+                && (b.IsInitialized == null || b.IsInitialized.Value)
+                && (b.State == JobState.Active || b.State == JobState.Pending),
             minRevision,
             cancellationToken
         );
diff --git a/src/Serval/src/Serval.Translation/Services/EngineCleanupService.cs b/src/Serval/src/Serval.Translation/Services/EngineCleanupService.cs
new file mode 100644
index 00000000..ff4a2e8b
--- /dev/null
+++ b/src/Serval/src/Serval.Translation/Services/EngineCleanupService.cs
@@ -0,0 +1,7 @@
+namespace Serval.Translation.Services;
+
+public class EngineCleanupService(
+    IServiceProvider services,
+    ILogger<EngineCleanupService> logger,
+    TimeSpan? timeout = null
+) : UninitializedCleanupService<Engine>(services, logger, timeout) { }
diff --git a/src/Serval/src/Serval.Translation/Services/EngineService.cs b/src/Serval/src/Serval.Translation/Services/EngineService.cs
index a8bb3a05..5e653059 100644
--- a/src/Serval/src/Serval.Translation/Services/EngineService.cs
+++ b/src/Serval/src/Serval.Translation/Services/EngineService.cs
@@ -24,6 +24,25 @@ IScriptureDataFileService scriptureDataFileService
     private readonly ILogger<EngineService> _logger = loggerFactory.CreateLogger<EngineService>();
     private readonly IScriptureDataFileService _scriptureDataFileService = scriptureDataFileService;
 
+    public override async Task<Engine> GetAsync(string id, CancellationToken cancellationToken = default)
+    {
+        Engine engine = await base.GetAsync(id, cancellationToken);
+        if (!(engine.IsInitialized ?? true))
+            throw new EntityNotFoundException($"Could not find the {typeof(Engine).Name} '{id}'.");
+        return engine;
+    }
+
+    public override async Task<IEnumerable<Engine>> GetAllAsync(
+        string owner,
+        CancellationToken cancellationToken = default
+    )
+    {
+        return await Entities.GetAllAsync(
+            e => e.Owner == owner && (e.IsInitialized == null || e.IsInitialized.Value),
+            cancellationToken
+        );
+    }
+
     public async Task<Models.TranslationResult> TranslateAsync(
         string engineId,
         string segment,
@@ -120,9 +139,9 @@ await client.TrainSegmentPairAsync(
 
     public override async Task<Engine> CreateAsync(Engine engine, CancellationToken cancellationToken = default)
     {
-        bool updateIsModelPersisted = engine.IsModelPersisted is null;
         try
         {
+            engine.DateCreated = DateTime.UtcNow;
             await Entities.InsertAsync(engine, cancellationToken);
             TranslationEngineApi.TranslationEngineApiClient? client =
                 _grpcClientFactory.CreateClient<TranslationEngineApi.TranslationEngineApiClient>(engine.Type);
@@ -146,6 +165,15 @@ public override async Task<Engine> CreateAsync(Engine engine, CancellationToken
             {
                 IsModelPersisted = createResponse.IsModelPersisted
             };
+            await Entities.UpdateAsync(
+                engine,
+                u =>
+                {
+                    u.Set(e => e.IsInitialized, true);
+                    u.Set(e => e.IsModelPersisted, engine.IsModelPersisted);
+                },
+                cancellationToken: CancellationToken.None
+            );
         }
         catch (RpcException rpcex)
         {
@@ -164,14 +192,6 @@ public override async Task<Engine> CreateAsync(Engine engine, CancellationToken
             await Entities.DeleteAsync(engine, CancellationToken.None);
             throw;
         }
-        if (updateIsModelPersisted)
-        {
-            await Entities.UpdateAsync(
-                engine,
-                u => u.Set(e => e.IsModelPersisted, engine.IsModelPersisted),
-                cancellationToken: cancellationToken
-            );
-        }
         return engine;
     }
 
@@ -216,6 +236,7 @@ private Dictionary<string, List<int>> GetChapters(string fileLocation, string sc
 
     public async Task StartBuildAsync(Build build, CancellationToken cancellationToken = default)
     {
+        build.DateCreated = DateTime.UtcNow;
         Engine engine = await GetAsync(build.EngineRef, cancellationToken);
         await _builds.InsertAsync(build, cancellationToken);
 
@@ -325,6 +346,11 @@ pretranslate is null
                 _logger.LogInformation("{request}", JsonSerializer.Serialize(request));
             }
             await client.StartBuildAsync(request, cancellationToken: cancellationToken);
+            await _builds.UpdateAsync(
+                b => b.Id == build.Id,
+                u => u.Set(e => e.IsInitialized, true),
+                cancellationToken: CancellationToken.None
+            );
         }
         catch
         {
@@ -382,7 +408,11 @@ public async Task<ModelDownloadUrl> GetModelDownloadUrlAsync(
 
     public Task AddCorpusAsync(string engineId, Models.Corpus corpus, CancellationToken cancellationToken = default)
     {
-        return Entities.UpdateAsync(engineId, u => u.Add(e => e.Corpora, corpus), cancellationToken: cancellationToken);
+        return Entities.UpdateAsync(
+            e => e.Id == engineId && (e.IsInitialized == null || e.IsInitialized.Value),
+            u => u.Add(e => e.Corpora, corpus),
+            cancellationToken: cancellationToken
+        );
     }
 
     public async Task<Models.Corpus> UpdateCorpusAsync(
@@ -394,7 +424,10 @@ public Task AddCorpusAsync(string engineId, Models.Corpus corpus, CancellationTo
     )
     {
         Engine? engine = await Entities.UpdateAsync(
-            e => e.Id == engineId && e.Corpora.Any(c => c.Id == corpusId),
+            e =>
+                e.Id == engineId
+                && (e.IsInitialized == null || e.IsInitialized.Value)
+                && e.Corpora.Any(c => c.Id == corpusId),
             u =>
             {
                 if (sourceFiles is not null)
@@ -421,7 +454,7 @@ await _dataAccessContext.WithTransactionAsync(
             async (ct) =>
             {
                 originalEngine = await Entities.UpdateAsync(
-                    engineId,
+                    e => e.Id == engineId && (e.IsInitialized == null || e.IsInitialized.Value),
                     u => u.RemoveAll(e => e.Corpora, c => c.Id == corpusId),
                     returnOriginal: true,
                     cancellationToken: ct
@@ -456,7 +489,7 @@ public Task AddParallelCorpusAsync(
     )
     {
         return Entities.UpdateAsync(
-            engineId,
+            e => e.Id == engineId && (e.IsInitialized == null || e.IsInitialized.Value),
             u => u.Add(e => e.ParallelCorpora, corpus),
             cancellationToken: cancellationToken
         );
@@ -471,7 +504,10 @@ public Task AddParallelCorpusAsync(
     )
     {
         Engine? engine = await Entities.UpdateAsync(
-            e => e.Id == engineId && e.ParallelCorpora.Any(c => c.Id == parallelCorpusId),
+            e =>
+                e.Id == engineId
+                && (e.IsInitialized == null || e.IsInitialized.Value)
+                && e.ParallelCorpora.Any(c => c.Id == parallelCorpusId),
             u =>
             {
                 if (sourceCorpora is not null)
@@ -502,7 +538,7 @@ await _dataAccessContext.WithTransactionAsync(
             async (ct) =>
             {
                 originalEngine = await Entities.UpdateAsync(
-                    engineId,
+                    e => e.Id == engineId && (e.IsInitialized == null || e.IsInitialized.Value),
                     u => u.RemoveAll(e => e.ParallelCorpora, c => c.Id == parallelCorpusId),
                     returnOriginal: true,
                     cancellationToken: ct
diff --git a/src/Serval/test/Serval.Translation.Tests/Services/BuildCleanupServiceTests.cs b/src/Serval/test/Serval.Translation.Tests/Services/BuildCleanupServiceTests.cs
new file mode 100644
index 00000000..fd2ab34d
--- /dev/null
+++ b/src/Serval/test/Serval.Translation.Tests/Services/BuildCleanupServiceTests.cs
@@ -0,0 +1,56 @@
+namespace Serval.Translation.Services;
+
+[TestFixture]
+public class BuildCleanupServiceTests
+{
+    [Test]
+    public async Task CleanupAsync()
+    {
+        TestEnvironment env = new();
+        Assert.That(env.Builds.Count, Is.EqualTo(2));
+        await env.CheckBuildsAsync();
+        Assert.That(env.Builds.Count, Is.EqualTo(1));
+        Assert.That((await env.Builds.GetAllAsync())[0].Id, Is.EqualTo("build2"));
+    }
+
+    private class TestEnvironment
+    {
+        public MemoryRepository<Build> Builds { get; }
+
+        public TestEnvironment()
+        {
+            Builds = new MemoryRepository<Build>();
+            Builds.Add(
+                new Build
+                {
+                    Id = "build1",
+                    EngineRef = "engine1",
+                    IsInitialized = false,
+                    DateCreated = DateTime.UtcNow.Subtract(TimeSpan.FromHours(10))
+                }
+            );
+            Builds.Add(
+                new Build
+                {
+                    Id = "build2",
+                    EngineRef = "engine2",
+                    IsInitialized = true,
+                    DateCreated = DateTime.UtcNow.Subtract(TimeSpan.FromHours(10))
+                }
+            );
+
+            Service = new BuildCleanupService(
+                Substitute.For<IServiceProvider>(),
+                Substitute.For<ILogger<BuildCleanupService>>(),
+                TimeSpan.Zero
+            );
+        }
+
+        public BuildCleanupService Service { get; }
+
+        public async Task CheckBuildsAsync()
+        {
+            await Service.CheckEntitiesAsync(Builds, CancellationToken.None);
+        }
+    }
+}
diff --git a/src/Serval/test/Serval.Translation.Tests/Services/EngineCleanupServiceTests.cs b/src/Serval/test/Serval.Translation.Tests/Services/EngineCleanupServiceTests.cs
new file mode 100644
index 00000000..b4ae29e4
--- /dev/null
+++ b/src/Serval/test/Serval.Translation.Tests/Services/EngineCleanupServiceTests.cs
@@ -0,0 +1,62 @@
+namespace Serval.Translation.Services;
+
+[TestFixture]
+public class EngineCleanupServiceTests
+{
+    [Test]
+    public async Task CleanupAsync()
+    {
+        TestEnvironment env = new();
+        Assert.That(env.Engines.Count, Is.EqualTo(2));
+        await env.CheckEnginesAsync();
+        Assert.That(env.Engines.Count, Is.EqualTo(1));
+        Assert.That((await env.Engines.GetAllAsync())[0].Id, Is.EqualTo("engine2"));
+    }
+
+    private class TestEnvironment
+    {
+        public MemoryRepository<Engine> Engines { get; }
+
+        public TestEnvironment()
+        {
+            Engines = new MemoryRepository<Engine>();
+            Engines.Add(
+                new Engine
+                {
+                    Id = "engine1",
+                    SourceLanguage = "en",
+                    TargetLanguage = "es",
+                    Type = "Nmt",
+                    Owner = "client1",
+                    IsInitialized = false,
+                    DateCreated = DateTime.UtcNow.Subtract(TimeSpan.FromHours(10))
+                }
+            );
+            Engines.Add(
+                new Engine
+                {
+                    Id = "engine2",
+                    SourceLanguage = "en",
+                    TargetLanguage = "es",
+                    Type = "Nmt",
+                    Owner = "client1",
+                    IsInitialized = true,
+                    DateCreated = DateTime.UtcNow.Subtract(TimeSpan.FromHours(10))
+                }
+            );
+
+            Service = new EngineCleanupService(
+                Substitute.For<IServiceProvider>(),
+                Substitute.For<ILogger<EngineCleanupService>>(),
+                TimeSpan.Zero
+            );
+        }
+
+        public EngineCleanupService Service { get; }
+
+        public async Task CheckEnginesAsync()
+        {
+            await Service.CheckEntitiesAsync(Engines, CancellationToken.None);
+        }
+    }
+}