diff --git a/tests/KArtSell.Integration.Tests/TestDatabaseConnection.cs b/tests/KArtSell.Integration.Tests/TestDatabaseConnection.cs
index 14ebc899..d243c162 100644
--- a/tests/KArtSell.Integration.Tests/TestDatabaseConnection.cs
+++ b/tests/KArtSell.Integration.Tests/TestDatabaseConnection.cs
@@ -6,6 +6,10 @@ internal static class TestDatabaseConnection
 {
     public static string GetConnectionString()
     {
+        var configured = Environment.GetEnvironmentVariable("KARTSELL_POSTGRES");
+        if (!string.IsNullOrWhiteSpace(configured))
+            return configured;
+
         var path = Path.Combine(AppContext.BaseDirectory, "appsettings.Development.json");
         if (!File.Exists(path))
             throw new InvalidOperationException($"Integration test settings are required: {path}");