diff --git a/test/Identity.FunctionalTests/Properties/AssemblyInfo.cs b/test/Identity.FunctionalTests/Properties/AssemblyInfo.cs
new file mode 100644
index 0000000000..f8a194b9d1
--- /dev/null
+++ b/test/Identity.FunctionalTests/Properties/AssemblyInfo.cs
@@ -0,0 +1,8 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using Microsoft.AspNetCore.Testing.xunit;
+using Xunit;
+
+// Caused OOM test issues with file watcher. See https://github.com/aspnet/Identity/issues/1926
+[assembly: CollectionBehavior(DisableTestParallelization = true)]