diff --git a/LeaderboardBackend.Test/Fixtures/PostgresDatabaseFixture.cs b/LeaderboardBackend.Test/Fixtures/PostgresDatabaseFixture.cs
index 6f64cd29..6fc97180 100644
--- a/LeaderboardBackend.Test/Fixtures/PostgresDatabaseFixture.cs
+++ b/LeaderboardBackend.Test/Fixtures/PostgresDatabaseFixture.cs
@@ -1,11 +1,9 @@
 using System;
 using System.Threading.Tasks;
-using DotNet.Testcontainers.Builders;
-using DotNet.Testcontainers.Configurations;
-using DotNet.Testcontainers.Containers;
 using LeaderboardBackend.Test.Fixtures;
 using Npgsql;
 using NUnit.Framework;
+using Testcontainers.PostgreSql;
 
 // Fixtures apply to all tests in its namespace
 // It has no namespace on purpose, so that the fixture applies to all tests in this assembly
@@ -13,10 +11,13 @@
 [SetUpFixture] // https://docs.nunit.org/articles/nunit/writing-tests/attributes/setupfixture.html
 internal class PostgresDatabaseFixture
 {
-	public static TestcontainerDatabase? PostgresContainer { get; private set; }
+	public static PostgreSqlContainer? PostgresContainer { get; private set; }
+	public static string? Database { get; private set; }
+	public static string? Username { get; private set; }
+	public static string? Password { get; private set; }
+	public static int Port { get; private set; }
 	public static bool HasCreatedTemplate { get; private set; } = false;
-
-	private static string TemplateDatabase => PostgresContainer?.Database + "_template";
+	private static string TemplateDatabase => Database! + "_template";
 
 	[OneTimeSetUp]
 	public static async Task OneTimeSetup()
@@ -26,16 +27,16 @@ public static async Task OneTimeSetup()
 			return;
 		}
 
-		PostgresContainer = new ContainerBuilder<PostgreSqlTestcontainer>()
-			.WithDatabase(new PostgreSqlTestcontainerConfiguration
-			{
-				Database = "db",
-				Username = "dbuser",
-				Password = "weft5gst768sr",
-			})
+		PostgresContainer = new PostgreSqlBuilder()
 			.WithTmpfsMount("/var/lib/postgresql/data") // db files in-memory
 			.Build();
 		await PostgresContainer.StartAsync();
+
+		NpgsqlConnectionStringBuilder connStrBuilder = new(PostgresContainer.GetConnectionString());
+		Username = connStrBuilder.Username!;
+		Password = connStrBuilder.Password!;
+		Database = connStrBuilder.Database!;
+		Port = connStrBuilder.Port;
 	}
 
 	[OneTimeTearDown]
@@ -58,8 +59,8 @@ public static void CreateTemplateFromCurrentDb()
 		conn.CreateCommand(@$"
 			DROP DATABASE IF EXISTS {TemplateDatabase};
 			CREATE DATABASE {TemplateDatabase}
-				WITH TEMPLATE {PostgresContainer!.Database}
-				OWNER '{PostgresContainer!.Username}';
+				WITH TEMPLATE {Database}
+				OWNER '{Username}';
 			")
 			.ExecuteNonQuery();
 		HasCreatedTemplate = true;
@@ -78,10 +79,10 @@ public static void ResetDatabaseToTemplate()
 		NpgsqlConnection.ClearAllPools(); // can't drop a DB if connections remain open
 		using NpgsqlDataSource conn = CreateConnectionToTemplate();
 		conn.CreateCommand(@$"
-			DROP DATABASE IF EXISTS {PostgresContainer!.Database};
-			CREATE DATABASE {PostgresContainer!.Database}
+			DROP DATABASE IF EXISTS {Database};
+			CREATE DATABASE {Database}
 				WITH TEMPLATE {TemplateDatabase}
-				OWNER '{PostgresContainer!.Username}';
+				OWNER '{Username}';
 			")
 			.ExecuteNonQuery();
 	}
@@ -89,7 +90,7 @@ WITH TEMPLATE {TemplateDatabase}
 	private static NpgsqlDataSource CreateConnectionToTemplate()
 	{
 		ThrowIfNotInitialized();
-		NpgsqlConnectionStringBuilder connStrBuilder = new(PostgresContainer!.ConnectionString)
+		NpgsqlConnectionStringBuilder connStrBuilder = new(PostgresContainer!.GetConnectionString())
 		{
 			Database = "template1"
 		};
diff --git a/LeaderboardBackend.Test/LeaderboardBackend.Test.csproj b/LeaderboardBackend.Test/LeaderboardBackend.Test.csproj
index 475ea7e0..37350fbd 100644
--- a/LeaderboardBackend.Test/LeaderboardBackend.Test.csproj
+++ b/LeaderboardBackend.Test/LeaderboardBackend.Test.csproj
@@ -16,7 +16,8 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Testcontainers" Version="2.4.0" />
+    <PackageReference Include="Testcontainers" Version="3.0.0" />
+    <PackageReference Include="Testcontainers.PostgreSql" Version="3.0.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/LeaderboardBackend.Test/TestApi/TestApiFactory.cs b/LeaderboardBackend.Test/TestApi/TestApiFactory.cs
index 8cdb67a2..ca62ce5c 100644
--- a/LeaderboardBackend.Test/TestApi/TestApiFactory.cs
+++ b/LeaderboardBackend.Test/TestApi/TestApiFactory.cs
@@ -35,11 +35,11 @@ protected override void ConfigureWebHost(IWebHostBuilder builder)
 					conf.UseInMemoryDb = false;
 					conf.Pg = new PostgresConfig
 					{
-						Db = PostgresDatabaseFixture.PostgresContainer.Database,
-						Port = (ushort)PostgresDatabaseFixture.PostgresContainer.Port,
+						Db = PostgresDatabaseFixture.Database!,
+						Port = (ushort)PostgresDatabaseFixture.Port,
 						Host = PostgresDatabaseFixture.PostgresContainer.Hostname,
-						User = PostgresDatabaseFixture.PostgresContainer.Username,
-						Password = PostgresDatabaseFixture.PostgresContainer.Password
+						User = PostgresDatabaseFixture.Username!,
+						Password = PostgresDatabaseFixture.Password!
 					};
 				});
 			}