diff --git a/csharp/ql/test/query-tests/ReadOnlyContainer/options b/csharp/ql/test/query-tests/ReadOnlyContainer/options
index 9ba0ece44ca..77b22963f5c 100644
--- a/csharp/ql/test/query-tests/ReadOnlyContainer/options
+++ b/csharp/ql/test/query-tests/ReadOnlyContainer/options
@@ -1 +1,2 @@
-semmle-extractor-options: /r:System.Collections.dll
+semmle-extractor-options: /nostdlib /noconfig
+semmle-extractor-options: --load-sources-from-project:${testdir}/../../resources/stubs/_frameworks/Microsoft.NETCore.App/Microsoft.NETCore.App.csproj