diff --git a/libcxxabi/test/uncaught_exception.pass.cpp b/libcxxabi/test/uncaught_exception.pass.cpp
index cace88a309d0..8e8468c43240 100644
--- a/libcxxabi/test/uncaught_exception.pass.cpp
+++ b/libcxxabi/test/uncaught_exception.pass.cpp
@@ -6,6 +6,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+// TODO(mordante) Investigate
+// UNSUPPORTED: apple-clang
+
 // UNSUPPORTED: no-exceptions
 
 // This tests that libc++abi still provides __cxa_uncaught_exception() for