diff --git a/src/core/tests/Deal.Tests.Unit/Api/TelegramKeysServiceTests.cs b/src/core/tests/Deal.Tests.Unit/Api/TelegramKeysServiceTests.cs
index 39451c4..8daca6e 100644
--- a/src/core/tests/Deal.Tests.Unit/Api/TelegramKeysServiceTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Api/TelegramKeysServiceTests.cs
@@ -10,13 +10,13 @@ namespace Deal.Tests.Unit.Api;
 /// </summary>
 public sealed class TelegramKeysServiceTests
 {
-    private readonly FakeGlobalSettingsStore _store = new();
+    private readonly TestGlobalSettingsStore _store = new();
     private readonly FakeSecretCipher _cipher = new();
     private readonly TelegramKeysService _service;
 
     public TelegramKeysServiceTests()
     {
-        _service = new TelegramKeysService(_store, _cipher);
+        _service = new TelegramKeysService(_store.Store, _cipher);
     }
 
     [Fact]
diff --git a/src/core/tests/Deal.Tests.Unit/Api/TgStatusServiceTests.cs b/src/core/tests/Deal.Tests.Unit/Api/TgStatusServiceTests.cs
index 806ec82..8e8b081 100644
--- a/src/core/tests/Deal.Tests.Unit/Api/TgStatusServiceTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Api/TgStatusServiceTests.cs
@@ -42,7 +42,7 @@ public sealed class TgStatusServiceTests
     [Fact]
     public async Task GetAsync_GatewayUnavailable_ReturnsIdleFormWithKvAccountCountAndKeys()
     {
-        (TgStatusService service, FakeTelegramStore store, FakeSettingsStore settings, FakeTelegramGateway gateway, _, FakeGlobalSettingsStore globalSettings) = Create();
+        (TgStatusService service, FakeTelegramStore store, FakeSettingsStore settings, FakeTelegramGateway gateway, _, TestGlobalSettingsStore globalSettings) = Create();
         store.Seed(Dialog("d_1", "Канал", "channel", Monitor: true));
         store.Seed(Dialog("d_2", "Группа", "group", Monitor: true));
         store.Seed(Dialog("d_off", "Выключен", "channel", Monitor: false));
@@ -68,7 +68,7 @@ public sealed class TgStatusServiceTests
     [Fact]
     public async Task GetAsync_ReadyGateway_ComposesLiveFieldsWithKvAccountMonitoredAndKeys()
     {
-        (TgStatusService service, FakeTelegramStore store, FakeSettingsStore settings, FakeTelegramGateway gateway, _, FakeGlobalSettingsStore globalSettings) = Create();
+        (TgStatusService service, FakeTelegramStore store, FakeSettingsStore settings, FakeTelegramGateway gateway, _, TestGlobalSettingsStore globalSettings) = Create();
         store.Seed(Dialog("d_1", "Канал", "channel", Monitor: true));
         settings.Preload(SettingsKeys.TgAccount, "\"@realuser\"");
         PreloadKeys(globalSettings, "123456", "abcdefghijklmnop");
@@ -105,14 +105,14 @@ public sealed class TgStatusServiceTests
     // ─── Хелперы ────────────────────────────────────────────────────────────
 
     // Собирает сервис на фейках (FakeTelegramGateway/Store/SettingsStore/GlobalSettingsStore + FakeSecretCipher).
-    private static (TgStatusService Service, FakeTelegramStore Store, FakeSettingsStore Settings, FakeTelegramGateway Gateway, FakeSecretCipher Cipher, FakeGlobalSettingsStore GlobalSettings) Create()
+    private static (TgStatusService Service, FakeTelegramStore Store, FakeSettingsStore Settings, FakeTelegramGateway Gateway, FakeSecretCipher Cipher, TestGlobalSettingsStore GlobalSettings) Create()
     {
         var store = new FakeTelegramStore();
         var settings = new FakeSettingsStore();
         var gateway = new FakeTelegramGateway();
         var cipher = new FakeSecretCipher();
-        var globalSettings = new FakeGlobalSettingsStore();
-        var keys = new TelegramKeysService(globalSettings, cipher);
+        var globalSettings = new TestGlobalSettingsStore();
+        var keys = new TelegramKeysService(globalSettings.Store, cipher);
         var dialogs = new DialogsService(store, settings, gateway, NullLogger<DialogsService>.Instance);
         var service = new TgStatusService(gateway, dialogs, settings, keys);
         return (service, store, settings, gateway, cipher, globalSettings);
@@ -123,7 +123,7 @@ public sealed class TgStatusServiceTests
     // apiId: apiId приложения (5..9 цифр).
     // apiHash: Открытый api_hash (ядро шифрует при сохранении).
     private static void PreloadKeys(
-        FakeGlobalSettingsStore settings,
+        TestGlobalSettingsStore settings,
         string apiId,
         string apiHash)
     {
diff --git a/src/core/tests/Deal.Tests.Unit/Modules/Settings/FakeGlobalSettingsStore.cs b/src/core/tests/Deal.Tests.Unit/Modules/Settings/FakeGlobalSettingsStore.cs
deleted file mode 100644
index a3f97c3..0000000
--- a/src/core/tests/Deal.Tests.Unit/Modules/Settings/FakeGlobalSettingsStore.cs
+++ /dev/null
@@ -1,50 +0,0 @@
-using Deal.Modules.Settings.Application.Abstractions;
-using Deal.Modules.Settings.Application.Models;
-
-namespace Deal.Tests.Unit.Modules.Settings;
-
-/// <summary>
-/// In-memory реализация <see cref="IGlobalSettingsStore"/> для юнит-тестов глобальных настроек.
-/// </summary>
-public sealed class FakeGlobalSettingsStore : IGlobalSettingsStore
-{
-    private readonly Dictionary<string, SettingValue> _rows = new(StringComparer.Ordinal);
-
-    public IReadOnlyCollection<string> Keys => _rows.Keys.ToList();
-
-    /// <summary>
-    /// Кладёт готовую строку
-    /// </summary>
-    /// <param name="key">Ключ настройки.</param>
-    /// <param name="valueJson">Значение, сериализованное в JSON.</param>
-    public void Preload(string key, string valueJson)
-    {
-        _rows[key] = new SettingValue(key, valueJson, DateTimeOffset.UtcNow);
-    }
-
-    /// <summary>
-    /// Возвращает JSON сохранённого значения или null, если ключа нет.
-    /// </summary>
-    /// <param name="key">Ключ настройки.</param>
-    /// <returns>JSON-строка значения или null.</returns>
-    public string? GetStoredJson(string key)
-    {
-        return _rows.TryGetValue(key, out SettingValue? row) ? row.ValueJson : null;
-    }
-
-    /// <inheritdoc />
-    public Task<SettingValue?> GetAsync(string key, CancellationToken ct)
-    {
-        return Task.FromResult(_rows.TryGetValue(key, out SettingValue? row) ? row : null);
-    }
-
-    /// <inheritdoc />
-    public Task SetAsync(
-        string key,
-        string valueJson,
-        CancellationToken ct)
-    {
-        _rows[key] = new SettingValue(key, valueJson, DateTimeOffset.UtcNow);
-        return Task.CompletedTask;
-    }
-}
diff --git a/src/core/tests/Deal.Tests.Unit/Support/OperatorAuthHttpHost.cs b/src/core/tests/Deal.Tests.Unit/Support/OperatorAuthHttpHost.cs
index 10d05ef..52007b7 100644
--- a/src/core/tests/Deal.Tests.Unit/Support/OperatorAuthHttpHost.cs
+++ b/src/core/tests/Deal.Tests.Unit/Support/OperatorAuthHttpHost.cs
@@ -144,9 +144,9 @@ internal static class OperatorAuthHttpHost
     public static async Task RunWithGlobalSettingsAsync(
         FakeOperatorAuthStore operatorStore,
         FakeAuthStore userStore,
-        Func<string, FakeOperatorAuthStore, FakeAuthStore, FakeGlobalSettingsStore, FakeAuditLogStore, Task> scenario,
+        Func<string, FakeOperatorAuthStore, FakeAuthStore, TestGlobalSettingsStore, FakeAuditLogStore, Task> scenario,
         FakeAuditLogStore? auditStore = null,
-        FakeGlobalSettingsStore? globalSettingsStore = null) =>
+        TestGlobalSettingsStore? globalSettingsStore = null) =>
         await RunCoreAsync(
             operatorStore,
             userStore,
@@ -165,17 +165,17 @@ internal static class OperatorAuthHttpHost
         FakeInviteStore? inviteStore,
         FakeTenantStore? tenantStore,
         FakeTenantLimitStore? limitStore,
-        Func<string, FakeOperatorAuthStore, FakeAuthStore, FakeTenantStore, FakeInviteStore, FakeAuditLogStore, FakeTenantLimitStore, FakeGlobalSettingsStore, Task> scenario,
+        Func<string, FakeOperatorAuthStore, FakeAuthStore, FakeTenantStore, FakeInviteStore, FakeAuditLogStore, FakeTenantLimitStore, TestGlobalSettingsStore, Task> scenario,
         RateLimitOptions? rateLimitOptions = null,
         FakeTokenUsageEventStore? tokenUsageStore = null,
-        FakeGlobalSettingsStore? globalSettingsStore = null)
+        TestGlobalSettingsStore? globalSettingsStore = null)
     {
         FakeAuditLogStore effectiveAuditStore = auditStore ?? new FakeAuditLogStore();
         FakeInviteStore effectiveInviteStore = inviteStore ?? new FakeInviteStore();
         FakeTenantStore effectiveTenantStore = tenantStore ?? new FakeTenantStore();
         FakeTenantLimitStore effectiveLimitStore = limitStore ?? new FakeTenantLimitStore();
         FakeTokenUsageEventStore effectiveTokenUsageStore = tokenUsageStore ?? new FakeTokenUsageEventStore();
-        FakeGlobalSettingsStore effectiveGlobalSettingsStore = globalSettingsStore ?? new FakeGlobalSettingsStore();
+        TestGlobalSettingsStore effectiveGlobalSettingsStore = globalSettingsStore ?? new TestGlobalSettingsStore();
         RateLimitOptions effectiveRateLimitOptions = rateLimitOptions ?? new RateLimitOptions();
         int port = TestPort.Allocate();
         WebApplicationBuilder builder = WebApplication.CreateBuilder();
@@ -192,7 +192,7 @@ internal static class OperatorAuthHttpHost
         builder.Services.AddSingleton<IInviteStore>(effectiveInviteStore);
         builder.Services.AddSingleton<ITenantRepository>(effectiveTenantStore);
         builder.Services.AddSingleton<ITenantLimitStore>(effectiveLimitStore);
-        builder.Services.AddSingleton<IGlobalSettingsStore>(effectiveGlobalSettingsStore);
+        builder.Services.AddSingleton<IGlobalSettingsStore>(effectiveGlobalSettingsStore.Store);
         builder.Services.AddSingleton<ISecretCipher>(new FakeSecretCipher());
         // Сервис глобальных ключей Telegram (операторские ручки /api/operator/settings/telegram-keys).
         builder.Services.AddScoped<TelegramKeysService>();
diff --git a/src/core/tests/Deal.Tests.Unit/Support/OperatorSettingsEndpointsHttpTests.cs b/src/core/tests/Deal.Tests.Unit/Support/OperatorSettingsEndpointsHttpTests.cs
index cd1ac47..ef1d402 100644
--- a/src/core/tests/Deal.Tests.Unit/Support/OperatorSettingsEndpointsHttpTests.cs
+++ b/src/core/tests/Deal.Tests.Unit/Support/OperatorSettingsEndpointsHttpTests.cs
@@ -257,7 +257,7 @@ public sealed class OperatorSettingsEndpointsHttpTests
         $"{baseAddress}/api/operator/settings/telegram-keys";
 
     // Прогоняет сценарий на хосте с фейком глобального хранилища и аудита.
-    private static Task RunAsync(Func<string, FakeOperatorAuthStore, FakeAuthStore, FakeGlobalSettingsStore, FakeAuditLogStore, Task> scenario, FakeAuditLogStore? auditStore = null) =>
+    private static Task RunAsync(Func<string, FakeOperatorAuthStore, FakeAuthStore, TestGlobalSettingsStore, FakeAuditLogStore, Task> scenario, FakeAuditLogStore? auditStore = null) =>
         OperatorAuthHttpHost.RunWithGlobalSettingsAsync(
             NewOperatorStore(),
             new FakeAuthStore(),
diff --git a/src/core/tests/Deal.Tests.Unit/Support/TestGlobalSettingsStore.cs b/src/core/tests/Deal.Tests.Unit/Support/TestGlobalSettingsStore.cs
new file mode 100644
index 0000000..3a50ce5
--- /dev/null
+++ b/src/core/tests/Deal.Tests.Unit/Support/TestGlobalSettingsStore.cs
@@ -0,0 +1,52 @@
+using Deal.Modules.Settings.Application.Abstractions;
+using Deal.Modules.Settings.Application.Models;
+using NSubstitute;
+
+namespace Deal.Tests.Unit.Support;
+
+/// <summary>
+/// Подставка <see cref="IGlobalSettingsStore"/> на словаре: в DI уходит NSubstitute-подставка
+/// (<see cref="Store"/>), а тесты читают/сеют состояние через <see cref="Preload"/> и <see cref="GetStoredJson"/>.
+/// </summary>
+public sealed class TestGlobalSettingsStore
+{
+    private readonly Dictionary<string, SettingValue> _rows = new(StringComparer.Ordinal);
+
+    /// <summary>
+    /// Подставка порта глобальных настроек (создаётся в конструкторе).
+    /// </summary>
+    public IGlobalSettingsStore Store { get; }
+
+    /// <summary>
+    /// Создаёт подставку с пустым словарём.
+    /// </summary>
+    public TestGlobalSettingsStore()
+    {
+        Store = Substitute.For<IGlobalSettingsStore>();
+        Store.GetAsync(Arg.Any<string>(), Arg.Any<CancellationToken>())
+            .Returns(ci => _rows.TryGetValue(ci.ArgAt<string>(0), out SettingValue? row) ? row : null);
+        Store.When(s => s.SetAsync(Arg.Any<string>(), Arg.Any<string>(), Arg.Any<CancellationToken>()))
+            .Do(ci => _rows[ci.ArgAt<string>(0)] =
+                new SettingValue(ci.ArgAt<string>(0), ci.ArgAt<string>(1), DateTimeOffset.UtcNow));
+    }
+
+    /// <summary>
+    /// Кладёт готовую строку настройки.
+    /// </summary>
+    /// <param name="key">Ключ настройки.</param>
+    /// <param name="valueJson">Значение, сериализованное в JSON.</param>
+    public void Preload(string key, string valueJson)
+    {
+        _rows[key] = new SettingValue(key, valueJson, DateTimeOffset.UtcNow);
+    }
+
+    /// <summary>
+    /// Возвращает JSON сохранённого значения или null, если ключа нет.
+    /// </summary>
+    /// <param name="key">Ключ настройки.</param>
+    /// <returns>JSON-строка значения или null.</returns>
+    public string? GetStoredJson(string key)
+    {
+        return _rows.TryGetValue(key, out SettingValue? row) ? row.ValueJson : null;
+    }
+}