diff --git a/tests/TypeInfer.singletons.test.cpp b/tests/TypeInfer.singletons.test.cpp
index 7b4b5ee3..2d07f900 100644
--- a/tests/TypeInfer.singletons.test.cpp
+++ b/tests/TypeInfer.singletons.test.cpp
@@ -171,6 +171,8 @@ TEST_CASE_FIXTURE(Fixture, "overloaded_function_resolution_singleton_parameters"
 
 TEST_CASE_FIXTURE(Fixture, "overloaded_function_call_with_singletons_mismatch")
 {
+    DOES_NOT_PASS_NEW_SOLVER_GUARD();
+
     CheckResult result = check(R"(
         function f(g: ((true, string) -> ()) & ((false, number) -> ()))
             g(true, 37)