diff --git a/VeraxShield/TestVeraxShield/DonneurEtatTests.cs b/VeraxShield/TestVeraxShield/DonneurEtatTests.cs
new file mode 100644
index 0000000..914c763
--- /dev/null
+++ b/VeraxShield/TestVeraxShield/DonneurEtatTests.cs
@@ -0,0 +1,85 @@
+using Moq;
+using System.Collections.Generic;
+using System.Security.Claims;
+using System.Threading.Tasks;
+using VeraxShield.composants.formulaires.modeles;
+using VeraxShield.modele.utilisateurs;
+using VeraxShield.services.UtilisateursDataService;
+using Xunit;
+
+namespace VeraxShield.UnitTests
+{
+    public class DonneurEtatTests
+    {
+        private readonly DonneurEtat _donneurEtat;
+        private readonly Mock<IAuthentificationService> _mockAuthService;
+        private readonly Mock<IUtilisateursDataService> _mockUserDataService;
+
+        public DonneurEtatTests()
+        {
+            _mockAuthService = new Mock<IAuthentificationService>();
+            _mockUserDataService = new Mock<IUtilisateursDataService>();
+            _donneurEtat = new DonneurEtat(_mockAuthService.Object, _mockUserDataService.Object);
+        }
+
+        [Fact]
+        public async Task Connexion_ValidCredentials_SetsCurrentUser()
+        {
+            // Arrange
+            var requeteConnexion = new RequeteConnexion { Pseudo = "testUser", MotDePasse = "testPass" };
+            var utilisateurCourant = new UtilisateurCourant
+            {
+                Pseudo = "testUser",
+                EstAuthentifie = true,
+                Claims = new Dictionary<string, string> { { ClaimTypes.Role, "User" } }
+            };
+
+            _mockAuthService.Setup(x => x.GetUtilisateur(requeteConnexion.Pseudo)).ReturnsAsync(utilisateurCourant);
+            _mockAuthService.Setup(x => x.Connexion(requeteConnexion)).Returns(Task.CompletedTask);
+
+            // Act
+            await _donneurEtat.Connexion(requeteConnexion);
+
+            // Assert
+            Assert.NotNull(_donneurEtat._utilisateurCourant);
+            Assert.True(_donneurEtat._utilisateurCourant.EstAuthentifie);
+            _mockAuthService.Verify(x => x.Connexion(requeteConnexion), Times.Once);
+            _mockAuthService.Verify(x => x.GetUtilisateur(requeteConnexion.Pseudo), Times.Once);
+        }
+
+        [Fact]
+        public async Task Deconnexion_ClearsCurrentUser()
+        {
+            // Arrange - assume user is logged in
+            _donneurEtat._utilisateurCourant = new UtilisateurCourant { EstAuthentifie = true };
+
+            // Act
+            await _donneurEtat.Deconnexion();
+
+            // Assert
+            Assert.Null(_donneurEtat._utilisateurCourant);
+        }
+
+        [Fact]
+        public async Task Inscription_ValidData_RegistersUser()
+        {
+            // Arrange
+            var requeteInscription = new RequeteInscription
+            {
+                Pseudo = "newUser",
+                MotDePasse = "newPass",
+                Mail = "newUser@test.com",
+                Nom = "New",
+                Prenom = "User"
+            };
+
+            _mockAuthService.Setup(x => x.Inscription(requeteInscription)).Returns(Task.CompletedTask);
+
+            // Act
+            await _donneurEtat.Inscription(requeteInscription);
+
+            // Assert - Since Inscription does not automatically log in the user, we check if the method was called.
+            _mockAuthService.Verify(x => x.Inscription(requeteInscription), Times.Once);
+        }
+    }
+}
diff --git a/VeraxShield/TestVeraxShield/TestVeraxShield.csproj b/VeraxShield/TestVeraxShield/TestVeraxShield.csproj
index 14bbc31..6972f53 100644
--- a/VeraxShield/TestVeraxShield/TestVeraxShield.csproj
+++ b/VeraxShield/TestVeraxShield/TestVeraxShield.csproj
@@ -12,6 +12,7 @@
     <ItemGroup>
         <PackageReference Include="bunit.web" Version="1.27.17" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0"/>
+        <PackageReference Include="Moq" Version="4.20.70" />
         <PackageReference Include="xunit" Version="2.4.2"/>
         <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>