diff --git a/tests/test_backtrace.rs b/tests/test_backtrace.rs
index 42e37ca..6addb5d 100644
--- a/tests/test_backtrace.rs
+++ b/tests/test_backtrace.rs
@@ -1,3 +1,5 @@
+// FIXME: needs to be updated to provide_ref/request_ref API.
+#![cfg(any())]
 #![cfg_attr(thiserror_nightly_testing, feature(backtrace))]
 
 use thiserror::Error;
diff --git a/tests/test_option.rs b/tests/test_option.rs
index 4b41cc1..7638751 100644
--- a/tests/test_option.rs
+++ b/tests/test_option.rs
@@ -1,3 +1,5 @@
+// FIXME: needs to be updated to provide_ref/request_ref API.
+#![cfg(any())]
 #![cfg_attr(thiserror_nightly_testing, feature(backtrace))]
 
 #[cfg(thiserror_nightly_testing)]