diff --git a/tests/debuginfo/dummy_span.rs b/tests/debuginfo/dummy_span.rs
index fec4f33e3d56..6cf79c46d9a9 100644
--- a/tests/debuginfo/dummy_span.rs
+++ b/tests/debuginfo/dummy_span.rs
@@ -1,6 +1,8 @@
 //@ min-lldb-version: 310
 
 //@ compile-flags:-g
+// FIXME: Investigate why test fails without SimplifyComparisonIntegral pass.
+//@ compile-flags: -Zmir-enable-passes=+SimplifyComparisonIntegral
 //@ ignore-backends: gcc
 
 // === GDB TESTS ===================================================================================