When run integration tests throw SqlException

I am running integration tests. Before starting the test, I deleted the database and create it again. The first test is successful. But at the start of the second test I get an exception:

SetUp : System.Data.SqlClient.SqlException : Cannot drop database "Test" because it is currently in use.

Сode:

[TestFixture]
class Class1
{
    public SqlConnection Repository;

    [SetUp]
    public void LocInit()
    {
        Repository = new SqlConnection(@"Data Source=.\SQLEXPRESS; Integrated Security=true;");
        Repository.Open();
        Repository.Execute("USE master;");
        Repository.Execute("DROP DATABASE Test;");
        Repository.Execute("USE master; CREATE DATABASE Test;");
        Repository.Execute("USE Test;");
    }

    [Test]
    public void Test1()
    {
        using (var repository = new SqlConnection(@"Data Source=.\SQLEXPRESS; Integrated Security=true;"))
            repository.Execute("USE Test; SELECT 10");
    }

    [Test]
    public void Test2()
    {
        using (var repository = new SqlConnection(@"Data Source=.\SQLEXPRESS; Integrated Security=true;"))
            repository.Execute("USE Test; SELECT 10");
    }

    [TearDown]
    public void LocalTearDown()
    {
        Repository.Dispose();
    }
}

Why do I get this exception?