diff --git a/tests/codegen/dont-shuffle-bswaps.rs b/tests/codegen/dont-shuffle-bswaps.rs
index e100474f606..c1dab2bc295 100644
--- a/tests/codegen/dont-shuffle-bswaps.rs
+++ b/tests/codegen/dont-shuffle-bswaps.rs
@@ -1,8 +1,11 @@
-//@ revisions: OPT2 OPT3
+//@ revisions: OPT2 OPT3 OPT3_S390X
 //@[OPT2] compile-flags: -Copt-level=2
 //@[OPT3] compile-flags: -C opt-level=3
 // some targets don't do the opt we are looking for
 //@[OPT3] only-64bit
+//@[OPT3] ignore-s390x
+//@[OPT3_S390X] compile-flags: -C opt-level=3 -C target-cpu=z13
+//@[OPT3_S390X] only-s390x
 
 #![crate_type = "lib"]
 #![no_std]
@@ -17,6 +20,10 @@
 // OPT3-NEXT: call <8 x i16> @llvm.bswap
 // OPT3-NEXT: store <8 x i16>
 // OPT3-NEXT: ret void
+// OPT3_S390X: load <8 x i16>
+// OPT3_S390X-NEXT: call <8 x i16> @llvm.bswap
+// OPT3_S390X-NEXT: store <8 x i16>
+// OPT3_S390X-NEXT: ret void
 #[no_mangle]
 pub fn convert(value: [u16; 8]) -> [u8; 16] {
     #[cfg(target_endian = "little")]