diff --git a/Govor.API.Tests/UnitTests/Infrastructure/Validators/InvitationValidatorTests.cs b/Govor.API.Tests/UnitTests/Infrastructure/Validators/InvitationValidatorTests.cs
index e0f2314..7a2a9b4 100644
--- a/Govor.API.Tests/UnitTests/Infrastructure/Validators/InvitationValidatorTests.cs
+++ b/Govor.API.Tests/UnitTests/Infrastructure/Validators/InvitationValidatorTests.cs
@@ -1,7 +1,92 @@
+using AutoFixture;
+using Govor.Core.Infrastructure.Validators;
+using Govor.Core.Models;
+
 namespace Govor.API.Tests.UnitTests.Infrastructure.Validators;
 
 [TestFixture]
 public class InvitationValidatorTests
 {
+    private IObjectValidator<Invitation> _messageValidator;
+    private Fixture _fixture;
+
+    public InvitationValidatorTests()
+    {
+        _messageValidator = new InvitationValidator();
+        
+        _fixture = new Fixture();
+
+        _fixture.Behaviors
+            .OfType<ThrowingRecursionBehavior>()
+            .ToList()
+            .ForEach(b => _fixture.Behaviors.Remove(b));
+
+        _fixture.Behaviors.Add(new OmitOnRecursionBehavior());
+    }
     
+    [Test]
+    public void Given_ValidInvitation_When_Exist_Then_Returns_True()
+    {
+        var invitation = _fixture.Create<Invitation>();
+        
+        // Act & Assert 
+        Assert.DoesNotThrow( () => _messageValidator.Validate(invitation));
+        Assert.That(_messageValidator.TryValidate(invitation), Is.True);
+    }
+
+    [Test]
+    public void Given_NullInvitation_When_Exist_Then_Returns_False()
+    {
+        // Act & Assert 
+        Assert.Throws<InvalidObjectException<Invitation>>( () => _messageValidator.Validate(default));
+        Assert.That(_messageValidator.TryValidate(default), Is.False);
+    }
+    
+    [Test]
+    public void Given_EmptyInvitationId_When_Exist_Then_Returns_False()
+    {
+        // Arrange 
+        var invitation = _fixture.Create<Invitation>();
+        invitation.Id = Guid.Empty;
+        
+        // Act & Assert 
+        Assert.Throws<InvalidObjectException<Invitation>>( () => _messageValidator.Validate(invitation));
+        Assert.That(_messageValidator.TryValidate(invitation), Is.False);
+    }
+    
+    [Test]
+    public void Given_EmptyInvitationCreationDate_When_Exist_Then_Returns_False()
+    {
+        // Arrange 
+        var invitation = _fixture.Create<Invitation>();
+        invitation.DateCreated = DateTime.MinValue;
+        
+        // Act & Assert 
+        Assert.Throws<InvalidObjectException<Invitation>>( () => _messageValidator.Validate(invitation));
+        Assert.That(_messageValidator.TryValidate(invitation), Is.False);
+    }
+    
+    [Test]
+    public void Given_InvalidEndDate_When_Exist_Then_Returns_False()
+    {
+        // Arrange 
+        var invitation = _fixture.Create<Invitation>();
+        invitation.EndDate = invitation.DateCreated.AddDays(-1);
+        
+        // Act & Assert 
+        Assert.Throws<InvalidObjectException<Invitation>>( () => _messageValidator.Validate(invitation));
+        Assert.That(_messageValidator.TryValidate(invitation), Is.False);
+    }
+    
+    [Test]
+    public void Given_InvalidMaxParticipants_When_Exist_Then_Returns_False()
+    {
+        // Arrange 
+        var invitation = _fixture.Create<Invitation>();
+        invitation.MaxParticipants = new Random().Next(-5, 0);
+        
+        // Act & Assert 
+        Assert.Throws<InvalidObjectException<Invitation>>( () => _messageValidator.Validate(invitation));
+        Assert.That(_messageValidator.TryValidate(invitation), Is.False);
+    }
 }
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