diff --git a/src/Todo.CLI.Tests/Commands/CommandTests.cs b/src/Todo.CLI.Tests/Commands/CommandTests.cs
deleted file mode 100644
index bf62c3a..0000000
--- a/src/Todo.CLI.Tests/Commands/CommandTests.cs
+++ /dev/null
@@ -1,156 +0,0 @@
-using System.CommandLine;
-using Todo.CLI.Commands;
-using Todo.CLI.Tests.Handlers;
-using Todo.Core;
-using Xunit;
-
-namespace Todo.CLI.Tests.Commands;
-
-public abstract class CommandTestsBase
-{
-    protected readonly ServiceProvider _serviceProvider;
-
-    protected CommandTestsBase()
-    {
-        _serviceProvider = new ServiceCollection()
-            .AddSingleton<TodoCliConfiguration>()
-            .AddTodoRepositories()
-            .AddSingleton<IUserInteraction>(new MockUserInteraction())
-            .BuildServiceProvider();
-    }
-}
-
-public class AddCommandTests : CommandTestsBase
-{
-
-    [Fact]
-    public void AddCommand_ShouldHaveCorrectName()
-    {
-        // Arrange & Act
-        var command = new AddCommand(_serviceProvider);
-
-        // Assert
-        Assert.Equal("add", command.Name);
-    }
-
-    [Fact]
-    public void AddCommand_ShouldHaveDescription()
-    {
-        // Arrange & Act
-        var command = new AddCommand(_serviceProvider);
-
-        // Assert
-        Assert.False(string.IsNullOrEmpty(command.Description));
-    }
-
-    [Fact]
-    public void AddItemCommand_ShouldAcceptSubjectArgument()
-    {
-        // Arrange
-        var command = new AddCommand(_serviceProvider);
-        var itemSubCommand = command.Subcommands.Single(c => c.Name == "item");
-
-        // Act
-        var subjectArgument = itemSubCommand.Arguments.SingleOrDefault(a => a.Name == "subject");
-
-        // Assert
-        Assert.NotNull(subjectArgument);
-    }
-
-    [Fact]
-    public void AddItemCommand_ShouldAcceptListAndStarOptions()
-    {
-        // Arrange
-        var command = new AddCommand(_serviceProvider);
-        var itemSubCommand = command.Subcommands.Single(c => c.Name == "item");
-
-        // Act
-        var listOption = itemSubCommand.Options.SingleOrDefault(o => o.Name == "list");
-        var starOption = itemSubCommand.Options.SingleOrDefault(o => o.Name == "star");
-
-        // Assert
-        Assert.NotNull(listOption);
-        Assert.NotNull(starOption);
-    }
-}
-
-public class ListCommandTests : CommandTestsBase
-{
-
-    [Fact]
-    public void ListCommand_ShouldHaveCorrectName()
-    {
-        // Arrange & Act
-        var command = new ListCommand(_serviceProvider);
-
-        // Assert
-        Assert.Equal("list", command.Name);
-    }
-
-    [Fact]
-    public void ListCommand_ShouldAcceptAllFlag()
-    {
-        // Arrange
-        var command = new ListCommand(_serviceProvider);
-
-        // Act
-        var allOption = command.Children.OfType<Option>().FirstOrDefault(o => o.Name == "all");
-
-        // Assert
-        Assert.NotNull(allOption);
-    }
-}
-
-public class CompleteCommandTests : CommandTestsBase
-{
-
-    [Fact]
-    public void CompleteCommand_ShouldHaveCorrectName()
-    {
-        // Arrange & Act
-        var command = new CompleteCommand(_serviceProvider);
-
-        // Assert
-        Assert.Equal("complete", command.Name);
-    }
-
-    [Fact]
-    public void CompleteCommand_ShouldRequireIdArgument()
-    {
-        // Arrange
-        var command = new CompleteCommand(_serviceProvider);
-
-        // Act
-        var idArgument = command.Children.OfType<Argument>().FirstOrDefault(a => a.Name == "id");
-
-        // Assert
-        Assert.NotNull(idArgument);
-    }
-}
-
-public class RemoveCommandTests : CommandTestsBase
-{
-    [Fact]
-    public void RemoveCommand_ShouldHaveCorrectName()
-    {
-        // Arrange & Act
-        var command = new RemoveCommand(_serviceProvider);
-
-        // Assert
-        Assert.Equal("remove", command.Name);
-    }
-
-    [Fact]
-    public void RemoveItemCommand_ShouldRequireIdArgument()
-    {
-        // Arrange
-        var command = new RemoveCommand(_serviceProvider);
-        var itemSubCommand = command.Subcommands.Single(c => c.Name == "item");
-
-        // Act
-        var idArgument = itemSubCommand.Arguments.SingleOrDefault(a => a.Name == "id");
-
-        // Assert
-        Assert.NotNull(idArgument);
-    }
-}
diff --git a/src/Todo.Core/Todo.Core.csproj b/src/Todo.Core/Todo.Core.csproj
index 7acdc74..f7ef445 100644
--- a/src/Todo.Core/Todo.Core.csproj
+++ b/src/Todo.Core/Todo.Core.csproj
@@ -9,7 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="10.0.0" />
-    <PackageReference Include="Microsoft.Graph" Version="6.0.0" />
+    <PackageReference Include="Microsoft.Graph" Version="5.101.0" />
     <PackageReference Include="Microsoft.Identity.Client" Version="4.71.1" />
   </ItemGroup>