diff --git a/tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs b/tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs
index f8bc793..5294935 100644
--- a/tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs
+++ b/tests/SIGCM2.Application.Tests/Infrastructure/RefreshTokenRepositoryTests.cs
@@ -1,5 +1,6 @@
 using Dapper;
 using Microsoft.Data.SqlClient;
+using Respawn;
 using SIGCM2.Domain.Entities;
 using SIGCM2.Infrastructure.Persistence;
 
@@ -7,30 +8,35 @@ namespace SIGCM2.Application.Tests.Infrastructure;
 
 /// <summary>
 /// Integration tests for RefreshTokenRepository against SIGCM2_Test.
-/// Each test resets to a clean state using a transaction rollback pattern.
+/// Uses Respawn to reset the DB between test classes; the repository opens its own
+/// connections so transaction-scoped isolation would block on FK locks.
 /// </summary>
-[Collection("SqlIntegration")]
+[Collection("Database")]
 public class RefreshTokenRepositoryTests : IAsyncLifetime
 {
     private const string ConnectionString =
         "Server=TECNICA3;Database=SIGCM2_Test;User Id=desarrollo;Password=desarrollo2026;TrustServerCertificate=True;";
 
     private SqlConnection _connection = null!;
-    private SqlTransaction _transaction = null!;
+    private Respawner _respawner = null!;
     private RefreshTokenRepository _repository = null!;
+    private int _testUserId;
 
     public async Task InitializeAsync()
     {
         _connection = new SqlConnection(ConnectionString);
         await _connection.OpenAsync();
-        _transaction = (SqlTransaction)await _connection.BeginTransactionAsync();
 
-        // Seed a test user for FK requirements
-        await _connection.ExecuteAsync("""
-            IF NOT EXISTS (SELECT 1 FROM dbo.Usuario WHERE Username = 'test_rt_user')
-                INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo)
-                VALUES ('test_rt_user', '$2a$12$testhash', 'Test', 'User', 'admin', '["*"]', 1);
-            """, transaction: _transaction);
+        _respawner = await Respawner.CreateAsync(_connection, new RespawnerOptions
+        {
+            DbAdapter = DbAdapter.SqlServer
+        });
+
+        await _respawner.ResetAsync(_connection);
+        await SeedTestUserAsync();
+
+        _testUserId = await _connection.QuerySingleAsync<int>(
+            "SELECT Id FROM dbo.Usuario WHERE Username = 'test_rt_user'");
 
         var factory = new SqlConnectionFactory(ConnectionString);
         _repository = new RefreshTokenRepository(factory);
@@ -38,16 +44,19 @@ public class RefreshTokenRepositoryTests : IAsyncLifetime
 
     public async Task DisposeAsync()
     {
-        // Rollback transaction to clean up all test data
-        await _transaction.RollbackAsync();
+        await _respawner.ResetAsync(_connection);
+        await _connection.CloseAsync();
         await _connection.DisposeAsync();
     }
 
-    private static int GetTestUserId(SqlConnection conn, SqlTransaction tx)
+    private async Task SeedTestUserAsync()
     {
-        return conn.QuerySingle<int>(
-            "SELECT Id FROM dbo.Usuario WHERE Username = 'test_rt_user'",
-            transaction: tx);
+        await _connection.ExecuteAsync("""
+            SET QUOTED_IDENTIFIER ON;
+            IF NOT EXISTS (SELECT 1 FROM dbo.Usuario WHERE Username = 'test_rt_user')
+                INSERT INTO dbo.Usuario (Username, PasswordHash, Nombre, Apellido, Rol, PermisosJson, Activo)
+                VALUES ('test_rt_user', '$2a$12$testhash', 'Test', 'User', 'admin', '["*"]', 1);
+            """);
     }
 
     private static RefreshToken BuildToken(int usuarioId, string hash = "test_hash_abc123xyz", bool expired = false)
@@ -60,8 +69,7 @@ public class RefreshTokenRepositoryTests : IAsyncLifetime
     [Fact]
     public async Task AddAsync_PersistsAndReturnsId()
     {
-        var userId = GetTestUserId(_connection, _transaction);
-        var token = BuildToken(userId, "unique_hash_persist_" + Guid.NewGuid().ToString("N")[..8]);
+        var token = BuildToken(_testUserId, "unique_hash_persist_" + Guid.NewGuid().ToString("N")[..8]);
 
         var id = await _repository.AddAsync(token);
 
@@ -71,29 +79,26 @@ public class RefreshTokenRepositoryTests : IAsyncLifetime
     [Fact]
     public async Task AddAsync_DuplicateHash_Throws()
     {
-        var userId = GetTestUserId(_connection, _transaction);
         var hash = "duplicate_hash_" + Guid.NewGuid().ToString("N")[..8];
-        var token1 = BuildToken(userId, hash);
-        var token2 = BuildToken(userId, hash);
+        var token1 = BuildToken(_testUserId, hash);
+        var token2 = BuildToken(_testUserId, hash);
 
         await _repository.AddAsync(token1);
 
-        // Duplicate hash must violate UQ_RefreshToken_TokenHash
         await Assert.ThrowsAnyAsync<Exception>(() => _repository.AddAsync(token2));
     }
 
     [Fact]
     public async Task GetByHashAsync_RoundTripsAllFields()
     {
-        var userId = GetTestUserId(_connection, _transaction);
         var hash = "roundtrip_hash_" + Guid.NewGuid().ToString("N")[..8];
-        var token = BuildToken(userId, hash);
+        var token = BuildToken(_testUserId, hash);
 
         await _repository.AddAsync(token);
         var retrieved = await _repository.GetByHashAsync(hash);
 
         Assert.NotNull(retrieved);
-        Assert.Equal(userId, retrieved.UsuarioId);
+        Assert.Equal(_testUserId, retrieved.UsuarioId);
         Assert.Equal(hash, retrieved.TokenHash);
         Assert.Equal(token.FamilyId, retrieved.FamilyId);
         Assert.Null(retrieved.RevokedAt);
@@ -110,9 +115,8 @@ public class RefreshTokenRepositoryTests : IAsyncLifetime
     [Fact]
     public async Task RevokeAsync_SetsRevokedAtAndReplacedById()
     {
-        var userId = GetTestUserId(_connection, _transaction);
         var hash = "revoke_test_" + Guid.NewGuid().ToString("N")[..8];
-        var token = BuildToken(userId, hash);
+        var token = BuildToken(_testUserId, hash);
 
         var id = await _repository.AddAsync(token);
         var revokedAt = DateTime.UtcNow;
@@ -127,17 +131,15 @@ public class RefreshTokenRepositoryTests : IAsyncLifetime
     [Fact]
     public async Task RevokeFamilyAsync_OnlyAffectsMatchingFamily()
     {
-        var userId = GetTestUserId(_connection, _transaction);
         var hash1 = "family_a_" + Guid.NewGuid().ToString("N")[..8];
         var hash2 = "family_b_" + Guid.NewGuid().ToString("N")[..8];
 
-        var tokenA = BuildToken(userId, hash1);
-        var tokenB = BuildToken(userId, hash2);
+        var tokenA = BuildToken(_testUserId, hash1);
+        var tokenB = BuildToken(_testUserId, hash2);
 
         await _repository.AddAsync(tokenA);
         await _repository.AddAsync(tokenB);
 
-        // Revoke only family A
         var count = await _repository.RevokeFamilyAsync(tokenA.FamilyId, DateTime.UtcNow);
 
         Assert.Equal(1, count);
@@ -145,32 +147,28 @@ public class RefreshTokenRepositoryTests : IAsyncLifetime
         var retrievedA = await _repository.GetByHashAsync(hash1);
         var retrievedB = await _repository.GetByHashAsync(hash2);
 
-        Assert.NotNull(retrievedA?.RevokedAt);  // A is revoked
-        Assert.Null(retrievedB?.RevokedAt);      // B is untouched
+        Assert.NotNull(retrievedA?.RevokedAt);
+        Assert.Null(retrievedB?.RevokedAt);
     }
 
     [Fact]
     public async Task RevokeAllActiveForUserAsync_DoesNotTouchAlreadyRevoked()
     {
-        var userId = GetTestUserId(_connection, _transaction);
         var hash1 = "user_active_" + Guid.NewGuid().ToString("N")[..8];
         var hash2 = "user_revoked_" + Guid.NewGuid().ToString("N")[..8];
 
-        var tokenActive = BuildToken(userId, hash1);
-        var tokenAlreadyRevoked = BuildToken(userId, hash2);
+        var tokenActive = BuildToken(_testUserId, hash1);
+        var tokenAlreadyRevoked = BuildToken(_testUserId, hash2);
 
         var idActive = await _repository.AddAsync(tokenActive);
         var idRevoked = await _repository.AddAsync(tokenAlreadyRevoked);
         await _repository.RevokeAsync(idRevoked, null, DateTime.UtcNow.AddMinutes(-5));
 
-        var count = await _repository.RevokeAllActiveForUserAsync(userId, DateTime.UtcNow);
+        var count = await _repository.RevokeAllActiveForUserAsync(_testUserId, DateTime.UtcNow);
 
-        Assert.Equal(1, count);  // only the active one was revoked
+        Assert.Equal(1, count);
 
         var retrievedActive = await _repository.GetByHashAsync(hash1);
         Assert.NotNull(retrievedActive?.RevokedAt);
     }
 }
-
-[CollectionDefinition("SqlIntegration")]
-public class SqlIntegrationCollection : ICollectionFixture<object> { }