diff --git a/library/core/tests/ptr.rs b/library/core/tests/ptr.rs
index 78d1b137e63f5..07d4f61f6f026 100644
--- a/library/core/tests/ptr.rs
+++ b/library/core/tests/ptr.rs
@@ -304,6 +304,7 @@ fn test_const_nonnull_new() {
 #[test]
 #[cfg(unix)] // printf may not be available on other platforms
 #[allow(deprecated)] // For SipHasher
+#[cfg_attr(not(bootstrap), allow(unpredictable_function_pointer_comparisons))]
 pub fn test_variadic_fnptr() {
     use core::ffi;
     use core::hash::{Hash, SipHasher};