diff --git a/Marten.Integration.Tests/TestsInfrastructure/MartenTest.cs b/Marten.Integration.Tests/TestsInfrastructure/MartenTest.cs
index 2c3683b26..8ea5bb00b 100644
--- a/Marten.Integration.Tests/TestsInfrastructure/MartenTest.cs
+++ b/Marten.Integration.Tests/TestsInfrastructure/MartenTest.cs
@@ -36,7 +36,7 @@ public abstract class MartenTest(
 
     protected IEventStore EventStore => Session.Events;
 
-    protected readonly string SchemaName = useRandomSchema ? "sch" + Guid.NewGuid().ToString().Replace("-", string.Empty) : "EventStore";
+    protected readonly string SchemaName = useRandomSchema ? "sch" + Guid.NewGuid().ToString("N") : "EventStore";
 
     protected virtual IDocumentSession CreateSession(Action<StoreOptions>? storeOptions = null)
     {