How can I have multiple database instances for component tests

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C#

DevOps

Currently I have a common database used for component tests in xunit, the problem is that when a build is running on teamcity other builds cannot start as while one build is being run a number of tests are being executed which take quite some time. I need some help of how can I have my current class modified/changed in order to have multiple builds executing in parallel using multiple database instances

public class DatabaseFixture : IDisposable
	{
		public TestCluster Cluster { get; }
		public IGrainFactory GrainFactory => Cluster?.GrainFactory;
		public IClusterClient Client => Cluster?.Client;

		private const string _databaseConnection = @"Server=(localdb)\MSSQLLocalDB;Integrated Security=true";

			public DatabaseFixture()
		{
			// Find a valid folder for now
			foreach (var folder in _dbFolders)
			{
				if (!Directory.Exists(folder))
					continue;
				_databaseRootFolder = folder;
				break;
			}
			Assert.NotNull(_databaseRootFolder);

			// Create the test database
			CreateDatabase();
			CreateConfigDatabase();

			// Setup and start the cluster
			var builder = new TestClusterBuilder(2);
			builder.AddSiloBuilderConfigurator<DbTestSiloBuilderConfigurator>();

			var testCluster = builder.Build();
			if (testCluster?.Primary == null)
			{
				testCluster?.Deploy();
			}
			Cluster = testCluster;
		}
		
		// other methods that follow have been removed for keeping question short
	}

What I have tried:

Upto now only some research if this is possible