diff --git a/tests/mir-opt/pre-codegen/slice_iter.rs b/tests/mir-opt/pre-codegen/slice_iter.rs
index 3f89ab0e6f330..fee4214982d59 100644
--- a/tests/mir-opt/pre-codegen/slice_iter.rs
+++ b/tests/mir-opt/pre-codegen/slice_iter.rs
@@ -1,6 +1,7 @@
 // skip-filecheck
 //@ compile-flags: -O -C debuginfo=0 -Zmir-opt-level=2
 //@ only-64bit (constants for `None::<&T>` show in the output)
+//@ ignore-debug: precondition checks on ptr::add are under cfg(debug_assertions)
 // EMIT_MIR_FOR_EACH_PANIC_STRATEGY
 
 #![crate_type = "lib"]