diff --git a/tests/stack_overflow.rs b/tests/stack_overflow.rs
index 71ad12d6..845644b4 100644
--- a/tests/stack_overflow.rs
+++ b/tests/stack_overflow.rs
@@ -23,6 +23,7 @@ pub extern "C" fn _start() -> ! {
 #[allow(unconditional_recursion)]
 fn stack_overflow() {
     stack_overflow(); // for each recursion, the return address is pushed
+    volatile::Volatile::new(0).read(); // prevent tail recursion optimizations
 }
 
 lazy_static! {