diff --git a/src/core/tests/Deal.Tests.Unit/Contracts/BudgetedAiClassifierTests.cs b/src/core/tests/Deal.Tests.Unit/Contracts/BudgetedAiClassifierTests.cs
index cb302e3..5956995 100644
--- a/src/core/tests/Deal.Tests.Unit/Contracts/BudgetedAiClassifierTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Contracts/BudgetedAiClassifierTests.cs
@@ -6,6 +6,7 @@ using Deal.Modules.Tenants.Application.Models;
 using Deal.SharedKernel.Tenants.Models;
 using Deal.Tests.Unit.Modules.Settings;
 using Deal.Tests.Unit.Modules.Tenants;
+using Deal.Tests.Unit.Support;
 using Microsoft.Extensions.Logging.Abstractions;
 using Deal.Contracts.Integrations.Abstractions;
 using Deal.SharedKernel.Tenants.Abstractions;
@@ -150,7 +151,7 @@ public sealed class BudgetedAiClassifierTests
     // Settings: KV-настройки тенанта (маркеры LocalFieldsParser).
     private sealed record Context(
         IAiClassifier Decorator,
-        FakeAiClassifier Paid,
+        TestAiClassifier Paid,
         FakeSettingsStore Settings);
 
     // Собирает контекст: платный фейк + реальный Local-классификатор + фейк лимитов и tenant-контекст
@@ -164,9 +165,9 @@ public sealed class BudgetedAiClassifierTests
         configure?.Invoke(limits);
         ITenantContext tenantContext = new TenantContext();
         tenantContext.SetTenant(new TenantId(TenantIdValue));
-        var paid = new FakeAiClassifier();
+        var paid = new TestAiClassifier();
         IAiClassifier decorator = new BudgetedAiClassifier(
-            paid,
+            paid.Classifier,
             new LocalAiClassifier(new LocalFieldsParser(settings)),
             limits,
             tenantContext,
diff --git a/src/core/tests/Deal.Tests.Unit/Contracts/FakeAiClassifier.cs b/src/core/tests/Deal.Tests.Unit/Contracts/FakeAiClassifier.cs
deleted file mode 100644
index 504666f..0000000
--- a/src/core/tests/Deal.Tests.Unit/Contracts/FakeAiClassifier.cs
+++ /dev/null
@@ -1,66 +0,0 @@
-using Deal.Contracts.Integrations.Abstractions;
-using Deal.Contracts.Integrations.Models;
-
-namespace Deal.Tests.Unit.Contracts;
-
-/// <summary>
-/// In-memory реализация <see cref="IAiClassifier"/> для unit-тестов воркера pump.
-/// </summary>
-public sealed class FakeAiClassifier : IAiClassifier
-{
-    /// <summary>
-    /// Ответ FilterAsync по умолчанию — как LocalAiClassifier
-    /// </summary>
-    public AiFilterResultDto FilterResult { get; set; } = new(Pass: true, Reason: null, Skipped: true);
-
-    /// <summary>
-    /// Ответ ClassifyAsync; null — ClassifyAsync бросает NotSupportedException
-    /// </summary>
-    public AiParsedCardDto? ClassifyResult { get; set; }
-
-    /// <summary>
-    /// Сбой FilterAsync.
-    /// </summary>
-    public bool FilterThrows { get; set; }
-
-    /// <summary>
-    /// Сбой ClassifyAsync.
-    /// </summary>
-    public bool ClassifyThrows { get; set; }
-
-    /// <summary>
-    /// Сколько раз вызван FilterAsync
-    /// </summary>
-    public int FilterCalls { get; private set; }
-
-    /// <summary>
-    /// Сколько раз вызван ClassifyAsync
-    /// </summary>
-    public int ClassifyCalls { get; private set; }
-
-    /// <inheritdoc />
-    public Task<AiFilterResultDto> FilterAsync(string text, CancellationToken ct)
-    {
-        FilterCalls++;
-        if (FilterThrows)
-        {
-            throw new InvalidOperationException("Тестовый сбой ИИ-фильтра (FilterThrows).");
-        }
-
-        return Task.FromResult(FilterResult);
-    }
-
-    /// <inheritdoc />
-    public Task<AiParsedCardDto> ClassifyAsync(string text, CancellationToken ct)
-    {
-        ClassifyCalls++;
-        if (ClassifyThrows)
-        {
-            throw new InvalidOperationException("Тестовый сбой классификатора (ClassifyThrows).");
-        }
-
-        return ClassifyResult is null
-            ? throw new NotSupportedException()
-            : Task.FromResult(ClassifyResult);
-    }
-}
diff --git a/src/core/tests/Deal.Tests.Unit/Support/AdminTickOrchestratorTests.cs b/src/core/tests/Deal.Tests.Unit/Support/AdminTickOrchestratorTests.cs
index 4cc10c0..05a0a6f 100644
--- a/src/core/tests/Deal.Tests.Unit/Support/AdminTickOrchestratorTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Support/AdminTickOrchestratorTests.cs
@@ -31,7 +31,7 @@ public sealed class AdminTickOrchestratorTests
         FakePipelineStore PipelineStore,
         FakeKanjStore KanjStore,
         FakeSettingsStore Settings,
-        FakeAiClassifier AiClassifier,
+        TestAiClassifier AiClassifier,
         PipelinePumpGate PumpGate,
         SseSubscription Subscription);
 
@@ -205,7 +205,7 @@ public sealed class AdminTickOrchestratorTests
         FakePipelineStore store = withThrowingQueueRead ? new ThrowingQueueReadPipelineStore() : new FakePipelineStore();
         var kanjStore = new FakeKanjStore();
         var mlClient = new FakeMlClient();
-        var aiClassifier = new FakeAiClassifier();
+        var aiClassifier = new TestAiClassifier();
         var rules = new IncomingRules(settings);
         var fieldsParser = new LocalFieldsParser(settings);
         var ingest = new PipelineIngestService(store);
@@ -213,7 +213,7 @@ public sealed class AdminTickOrchestratorTests
         var composer = new CardComposer(kanjStore, settings);
         var writer = new PipelineCardWriter(kanjStore, store, composer);
         var worker = new PipelineWorkerService(
-            store, settings, rules, kanjStore, mlClient, aiClassifier, processing, writer, fieldsParser);
+            store, settings, rules, kanjStore, mlClient, aiClassifier.Classifier, processing, writer, fieldsParser);
 
         var broker = new SseBroker();
         var tickService = new StorageTickService(kanjStore, settings);
diff --git a/src/core/tests/Deal.Tests.Unit/Support/CardReclassifierTests.cs b/src/core/tests/Deal.Tests.Unit/Support/CardReclassifierTests.cs
index a3c408c..c767e19 100644
--- a/src/core/tests/Deal.Tests.Unit/Support/CardReclassifierTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Support/CardReclassifierTests.cs
@@ -24,7 +24,7 @@ public sealed class CardReclassifierTests
         FakeKanjStore Store,
         FakeSettingsStore Settings,
         FakeMlClient MlClient,
-        FakeAiClassifier AiClassifier,
+        TestAiClassifier AiClassifier,
         ReclassifyGate Gate);
 
     // Собирает контекст: фейки хранилищ/портов, реальные композитор/парсер/сервис карточек.
@@ -34,13 +34,13 @@ public sealed class CardReclassifierTests
         var settings = new FakeSettingsStore();
         var store = new FakeKanjStore();
         var mlClient = new FakeMlClient();
-        var aiClassifier = new FakeAiClassifier();
+        var aiClassifier = new TestAiClassifier();
         var fieldsParser = new LocalFieldsParser(settings);
         var composer = new CardComposer(store, settings);
         var cardsService = new CardsService(store, settings, mlClient, new FakeFileStorage());
         var gate = new ReclassifyGate();
         var reclassifier = new CardReclassifier(
-            store, settings, aiClassifier, fieldsParser, composer, cardsService, mlClient, gate);
+            store, settings, aiClassifier.Classifier, fieldsParser, composer, cardsService, mlClient, gate);
         return new Context(reclassifier, store, settings, mlClient, aiClassifier, gate);
     }
 
diff --git a/src/core/tests/Deal.Tests.Unit/Support/PipelineWorkerSchedulerTests.cs b/src/core/tests/Deal.Tests.Unit/Support/PipelineWorkerSchedulerTests.cs
index acd1c14..4a0b1db 100644
--- a/src/core/tests/Deal.Tests.Unit/Support/PipelineWorkerSchedulerTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Support/PipelineWorkerSchedulerTests.cs
@@ -157,7 +157,7 @@ public sealed class PipelineWorkerSchedulerTests
         var settingsA = new FakeSettingsStore();
         var settingsB = new FakeSettingsStore();
         var pumpGate = new PipelinePumpGate();
-        var aiClassifier = new FakeAiClassifier
+        var aiClassifier = new TestAiClassifier
         {
             ClassifyResult = Parsed("Python-разработчик в команду", isVacancy: true),
         };
@@ -168,7 +168,7 @@ public sealed class PipelineWorkerSchedulerTests
         services.AddSingleton<ITenantRepository>(tenants);
         services.AddSingleton(pumpGate);
         services.AddSingleton<IMlClient>(new FakeMlClient());
-        services.AddSingleton<IAiClassifier>(aiClassifier);
+        services.AddSingleton<IAiClassifier>(aiClassifier.Classifier);
         // Тенант-scoped адаптеры: фейк выбирает хранилище по ITenantContext, который цикл заполняет SetTenant
         // (эталон StorageTickSchedulerTests/ConnectionStringProvider.ForTenant).
         services.AddScoped<ICardStore>(provider => TenantOf(provider) == TenantA ? kanjA : kanjB);
diff --git a/src/core/tests/Deal.Tests.Unit/Support/PipelineWorkerServiceTests.cs b/src/core/tests/Deal.Tests.Unit/Support/PipelineWorkerServiceTests.cs
index 22e27b7..1e5bb56 100644
--- a/src/core/tests/Deal.Tests.Unit/Support/PipelineWorkerServiceTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Support/PipelineWorkerServiceTests.cs
@@ -28,7 +28,7 @@ public sealed class PipelineWorkerServiceTests
         FakeKanjStore KanjStore,
         FakeSettingsStore Settings,
         FakeMlClient MlClient,
-        FakeAiClassifier AiClassifier);
+        TestAiClassifier AiClassifier);
 
     // Собирает контекст: дефолты настроек/досок, ML «не готов» (как LocalMlClient), ИИ-фильтр пропускает.
     // pipelineStore: Хранилище очереди (по умолчанию — обычный фейк; сценарий гонки claim'а — RacingClaimPipelineStore).
@@ -39,14 +39,14 @@ public sealed class PipelineWorkerServiceTests
         var store = pipelineStore ?? new FakePipelineStore();
         var kanjStore = new FakeKanjStore();
         var mlClient = new FakeMlClient { Predict = NotReadyPrediction() };
-        var aiClassifier = new FakeAiClassifier();
+        var aiClassifier = new TestAiClassifier();
         var rules = new IncomingRules(settings);
         var fieldsParser = new LocalFieldsParser(settings);
         var processing = new PipelineProcessingService(store, mlClient, new PipelineIngestService(store));
         var composer = new CardComposer(kanjStore, settings);
         var writer = new PipelineCardWriter(kanjStore, store, composer);
         var worker = new PipelineWorkerService(
-            store, settings, rules, kanjStore, mlClient, aiClassifier, processing, writer, fieldsParser);
+            store, settings, rules, kanjStore, mlClient, aiClassifier.Classifier, processing, writer, fieldsParser);
         return new Context(worker, store, kanjStore, settings, mlClient, aiClassifier);
     }
 
diff --git a/src/core/tests/Deal.Tests.Unit/Support/TestAiClassifier.cs b/src/core/tests/Deal.Tests.Unit/Support/TestAiClassifier.cs
new file mode 100644
index 0000000..37ba2da
--- /dev/null
+++ b/src/core/tests/Deal.Tests.Unit/Support/TestAiClassifier.cs
@@ -0,0 +1,79 @@
+using Deal.Contracts.Integrations.Abstractions;
+using Deal.Contracts.Integrations.Models;
+using NSubstitute;
+
+namespace Deal.Tests.Unit.Support;
+
+/// <summary>
+/// Подставка <see cref="IAiClassifier"/> со сценарием состояния: сервисы получают NSubstitute-подставку
+/// (<see cref="Classifier"/>), тесты управляют поведением через свойства (как раньше — через фейк).
+/// </summary>
+public sealed class TestAiClassifier
+{
+    /// <summary>
+    /// Ответ FilterAsync по умолчанию — как LocalAiClassifier
+    /// </summary>
+    public AiFilterResultDto FilterResult { get; set; } = new(Pass: true, Reason: null, Skipped: true);
+
+    /// <summary>
+    /// Ответ ClassifyAsync; null — ClassifyAsync бросает NotSupportedException
+    /// </summary>
+    public AiParsedCardDto? ClassifyResult { get; set; }
+
+    /// <summary>
+    /// Сбой FilterAsync.
+    /// </summary>
+    public bool FilterThrows { get; set; }
+
+    /// <summary>
+    /// Сбой ClassifyAsync.
+    /// </summary>
+    public bool ClassifyThrows { get; set; }
+
+    /// <summary>
+    /// Сколько раз вызван FilterAsync
+    /// </summary>
+    public int FilterCalls { get; private set; }
+
+    /// <summary>
+    /// Сколько раз вызван ClassifyAsync
+    /// </summary>
+    public int ClassifyCalls { get; private set; }
+
+    /// <summary>
+    /// Подставка порта классификатора (создаётся в конструкторе).
+    /// </summary>
+    public IAiClassifier Classifier { get; }
+
+    /// <summary>
+    /// Создаёт подставку с поведением по умолчанию.
+    /// </summary>
+    public TestAiClassifier()
+    {
+        Classifier = Substitute.For<IAiClassifier>();
+        Classifier.When(c => c.FilterAsync(Arg.Any<string>(), Arg.Any<CancellationToken>()))
+            .Do(_ => FilterCalls++);
+        Classifier.FilterAsync(Arg.Any<string>(), Arg.Any<CancellationToken>())
+            .Returns(_ =>
+            {
+                if (FilterThrows)
+                {
+                    throw new InvalidOperationException("Тестовый сбой ИИ-фильтра (FilterThrows).");
+                }
+
+                return FilterResult;
+            });
+        Classifier.When(c => c.ClassifyAsync(Arg.Any<string>(), Arg.Any<CancellationToken>()))
+            .Do(_ => ClassifyCalls++);
+        Classifier.ClassifyAsync(Arg.Any<string>(), Arg.Any<CancellationToken>())
+            .Returns<AiParsedCardDto>(_ =>
+            {
+                if (ClassifyThrows)
+                {
+                    throw new InvalidOperationException("Тестовый сбой классификатора (ClassifyThrows).");
+                }
+
+                return ClassifyResult ?? throw new NotSupportedException();
+            });
+    }
+}