diff --git a/tests/SIGCM2.Api.Tests/Audit/TransactionScopeSpikeTests.cs b/tests/SIGCM2.Api.Tests/Audit/TransactionScopeSpikeTests.cs
index 32c9ca3..8c7bcf6 100644
--- a/tests/SIGCM2.Api.Tests/Audit/TransactionScopeSpikeTests.cs
+++ b/tests/SIGCM2.Api.Tests/Audit/TransactionScopeSpikeTests.cs
@@ -9,6 +9,7 @@ namespace SIGCM2.Api.Tests.Audit;
 /// TransactionScope with AsyncFlowEnabled must NOT escalate to MSDTC when
 /// multiple SqlConnections share a single connection string. If this fails,
 /// UDT-010 must pivot to explicit IUnitOfWork.
+[Collection("ApiIntegration")]
 public sealed class TransactionScopeSpikeTests
 {
     private const string ConnectionString =
diff --git a/tests/SIGCM2.Api.Tests/Audit/V010MigrationTests.cs b/tests/SIGCM2.Api.Tests/Audit/V010MigrationTests.cs
index 38ae730..e433d95 100644
--- a/tests/SIGCM2.Api.Tests/Audit/V010MigrationTests.cs
+++ b/tests/SIGCM2.Api.Tests/Audit/V010MigrationTests.cs
@@ -10,6 +10,7 @@ namespace SIGCM2.Api.Tests.Audit;
 ///   REQ-AUD-1: SYSTEM_VERSIONING active on catalog entities (smoke: Usuario + Usuario_History query).
 ///   REQ-AUD-2: dbo.AuditEvent exists, accepts valid INSERT, CHECK constraints reject invalid data.
 ///   REQ-SEC-1: dbo.SecurityEvent exists, CK_SecurityEvent_Result rejects invalid Result.
+[Collection("ApiIntegration")]
 public sealed class V010MigrationTests : IClassFixture<SIGCM2.TestSupport.TestWebAppFactory>
 {
     private const string ConnectionString =
diff --git a/tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs b/tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs
index 8758b8e..ccd6313 100644
--- a/tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs
+++ b/tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs
@@ -36,6 +36,11 @@ public class RefreshTokenRepositoryTests : IAsyncLifetime
                 new Respawn.Graph.Table("dbo", "Rol"),
                 new Respawn.Graph.Table("dbo", "Permiso"),
                 new Respawn.Graph.Table("dbo", "RolPermiso"),
+                // UDT-010: *_History tables are system-versioned — engine rejects direct DELETE.
+                new Respawn.Graph.Table("dbo", "Usuario_History"),
+                new Respawn.Graph.Table("dbo", "Rol_History"),
+                new Respawn.Graph.Table("dbo", "Permiso_History"),
+                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
             ]
         });
 
diff --git a/tests/SIGCM2.Application.Tests/Integration/RolRepositoryTests.cs b/tests/SIGCM2.Application.Tests/Integration/RolRepositoryTests.cs
index ee1cf60..17ec627 100644
--- a/tests/SIGCM2.Application.Tests/Integration/RolRepositoryTests.cs
+++ b/tests/SIGCM2.Application.Tests/Integration/RolRepositoryTests.cs
@@ -19,7 +19,9 @@ public class RolRepositoryTests : IAsyncLifetime
         _connection = new SqlConnection(ConnectionString);
         await _connection.OpenAsync();
 
-        // Clean Usuario first (FK), then custom Rol codes created by tests.
+        // Clean RefreshToken first (FK to Usuario), then Usuario (FK to Rol), then custom Rol codes.
+        // Residual RefreshTokens from prior test suites would violate FK_RefreshToken_Usuario otherwise.
+        await _connection.ExecuteAsync("DELETE FROM dbo.RefreshToken;");
         await _connection.ExecuteAsync("DELETE FROM dbo.Usuario;");
         await _connection.ExecuteAsync("DELETE FROM dbo.Rol WHERE Codigo NOT IN ('admin','cajero','operador_ctacte','picadora','jefe_publicidad','productor','diagramacion','reportes');");
         // Ensure canonical Rol seeds exist (idempotent — previous test classes may have wiped them via Respawn).
diff --git a/tests/SIGCM2.Application.Tests/Integration/UsuarioRepositoryTests.cs b/tests/SIGCM2.Application.Tests/Integration/UsuarioRepositoryTests.cs
index 27b34e9..6eabd33 100644
--- a/tests/SIGCM2.Application.Tests/Integration/UsuarioRepositoryTests.cs
+++ b/tests/SIGCM2.Application.Tests/Integration/UsuarioRepositoryTests.cs
@@ -28,6 +28,11 @@ public class UsuarioRepositoryTests : IAsyncLifetime
                 new Respawn.Graph.Table("dbo", "Rol"),
                 new Respawn.Graph.Table("dbo", "Permiso"),
                 new Respawn.Graph.Table("dbo", "RolPermiso"),
+                // UDT-010: *_History tables are system-versioned — engine rejects direct DELETE.
+                new Respawn.Graph.Table("dbo", "Usuario_History"),
+                new Respawn.Graph.Table("dbo", "Rol_History"),
+                new Respawn.Graph.Table("dbo", "Permiso_History"),
+                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
             ]
         });
 
diff --git a/tests/SIGCM2.Application.Tests/Integration/UsuarioRepository_PermisosTests.cs b/tests/SIGCM2.Application.Tests/Integration/UsuarioRepository_PermisosTests.cs
index 6ffe69a..6418293 100644
--- a/tests/SIGCM2.Application.Tests/Integration/UsuarioRepository_PermisosTests.cs
+++ b/tests/SIGCM2.Application.Tests/Integration/UsuarioRepository_PermisosTests.cs
@@ -32,6 +32,11 @@ public sealed class UsuarioRepository_PermisosTests : IAsyncLifetime
                 new Respawn.Graph.Table("dbo", "Rol"),
                 new Respawn.Graph.Table("dbo", "Permiso"),
                 new Respawn.Graph.Table("dbo", "RolPermiso"),
+                // UDT-010: *_History tables are system-versioned — engine rejects direct DELETE.
+                new Respawn.Graph.Table("dbo", "Usuario_History"),
+                new Respawn.Graph.Table("dbo", "Rol_History"),
+                new Respawn.Graph.Table("dbo", "Permiso_History"),
+                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
             ]
         });
 
diff --git a/tests/SIGCM2.Application.Tests/Integration/V009MigrationTests.cs b/tests/SIGCM2.Application.Tests/Integration/V009MigrationTests.cs
index 8566027..281b24e 100644
--- a/tests/SIGCM2.Application.Tests/Integration/V009MigrationTests.cs
+++ b/tests/SIGCM2.Application.Tests/Integration/V009MigrationTests.cs
@@ -31,6 +31,11 @@ public sealed class V009MigrationTests : IAsyncLifetime
                 new Respawn.Graph.Table("dbo", "Rol"),
                 new Respawn.Graph.Table("dbo", "Permiso"),
                 new Respawn.Graph.Table("dbo", "RolPermiso"),
+                // UDT-010: *_History tables are system-versioned — engine rejects direct DELETE.
+                new Respawn.Graph.Table("dbo", "Usuario_History"),
+                new Respawn.Graph.Table("dbo", "Rol_History"),
+                new Respawn.Graph.Table("dbo", "Permiso_History"),
+                new Respawn.Graph.Table("dbo", "RolPermiso_History"),
             ]
         });