diff --git a/openmp/libomptarget/test/jit/type_punning.c b/openmp/libomptarget/test/jit/type_punning.c
@@ -12,8 +12,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 // Ensure that there is only the kernel function left, not any outlined
 // parallel regions.

diff --git a/openmp/libomptarget/test/mapping/auto_zero_copy.cpp b/openmp/libomptarget/test/mapping/auto_zero_copy.cpp
@@ -13,8 +13,6 @@
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 // REQUIRES: unified_shared_memory
 

diff --git a/openmp/libomptarget/test/mapping/auto_zero_copy_globals.cpp b/openmp/libomptarget/test/mapping/auto_zero_copy_globals.cpp
@@ -9,8 +9,6 @@
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 // REQUIRES: unified_shared_memory
 

diff --git a/openmp/libomptarget/test/offloading/barrier_fence.c b/openmp/libomptarget/test/offloading/barrier_fence.c
@@ -7,8 +7,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <omp.h>
 #include <stdio.h>

diff --git a/openmp/libomptarget/test/offloading/bug49334.cpp b/openmp/libomptarget/test/offloading/bug49334.cpp
@@ -9,8 +9,6 @@
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 // UNSUPPORTED: amdgcn-amd-amdhsa
 // UNSUPPORTED: nvptx64-nvidia-cuda
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO

diff --git a/openmp/libomptarget/test/offloading/default_thread_limit.c b/openmp/libomptarget/test/offloading/default_thread_limit.c
@@ -9,8 +9,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 __attribute__((optnone)) int optnone() { return 1; }
 

diff --git a/openmp/libomptarget/test/offloading/ompx_bare.c b/openmp/libomptarget/test/offloading/ompx_bare.c
@@ -1,13 +1,10 @@
 // RUN: %libomptarget-compile-generic
-// RUN: env LIBOMPTARGET_INFO=63 %libomptarget-run-generic 2>&1 | \
-// RUN:   %fcheck-generic
+// RUN: env LIBOMPTARGET_INFO=63 %libomptarget-run-generic 2>&1 | %fcheck-generic
 //
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <assert.h>
 #include <ompx.h>

diff --git a/openmp/libomptarget/test/offloading/ompx_coords.c b/openmp/libomptarget/test/offloading/ompx_coords.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <omp.h>
 #include <ompx.h>

diff --git a/openmp/libomptarget/test/offloading/ompx_saxpy_mixed.c b/openmp/libomptarget/test/offloading/ompx_saxpy_mixed.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <math.h>
 #include <omp.h>

diff --git a/openmp/libomptarget/test/offloading/parallel_target_teams_reduction.cpp b/openmp/libomptarget/test/offloading/parallel_target_teams_reduction.cpp
@@ -6,8 +6,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <iostream>
 #include <vector>

diff --git a/openmp/libomptarget/test/offloading/small_trip_count.c b/openmp/libomptarget/test/offloading/small_trip_count.c
@@ -9,8 +9,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #define N 128
 

diff --git a/openmp/libomptarget/test/offloading/small_trip_count_thread_limit.cpp b/openmp/libomptarget/test/offloading/small_trip_count_thread_limit.cpp
@@ -7,8 +7,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 int main(int argc, char *argv[]) {
   constexpr const int block_size = 256;

diff --git a/openmp/libomptarget/test/offloading/spmdization.c b/openmp/libomptarget/test/offloading/spmdization.c
@@ -11,8 +11,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <omp.h>
 #include <stdio.h>

diff --git a/openmp/libomptarget/test/offloading/target_critical_region.cpp b/openmp/libomptarget/test/offloading/target_critical_region.cpp
@@ -6,8 +6,6 @@
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 // UNSUPPORTED: amdgcn-amd-amdhsa
 
 #include <omp.h>

diff --git a/openmp/libomptarget/test/offloading/thread_limit.c b/openmp/libomptarget/test/offloading/thread_limit.c
@@ -9,8 +9,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 int main() {
   int n = 1 << 20;

diff --git a/openmp/libomptarget/test/ompt/target_memcpy.c b/openmp/libomptarget/test/ompt/target_memcpy.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Verify that for the target OpenMP APIs, the return address is non-null and

diff --git a/openmp/libomptarget/test/ompt/target_memcpy_emi.c b/openmp/libomptarget/test/ompt/target_memcpy_emi.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Verify all three data transfer directions: H2D, D2D and D2H

diff --git a/openmp/libomptarget/test/ompt/veccopy.c b/openmp/libomptarget/test/ompt/veccopy.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that registers non-EMI callbacks

diff --git a/openmp/libomptarget/test/ompt/veccopy_data.c b/openmp/libomptarget/test/ompt/veccopy_data.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that registers EMI callbacks.

diff --git a/openmp/libomptarget/test/ompt/veccopy_disallow_both.c b/openmp/libomptarget/test/ompt/veccopy_disallow_both.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that shows that both EMI and non-EMI

diff --git a/openmp/libomptarget/test/ompt/veccopy_emi.c b/openmp/libomptarget/test/ompt/veccopy_emi.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that registers EMI callbacks

diff --git a/openmp/libomptarget/test/ompt/veccopy_emi_map.c b/openmp/libomptarget/test/ompt/veccopy_emi_map.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that shows that map-EMI callbacks are not supported.

diff --git a/openmp/libomptarget/test/ompt/veccopy_map.c b/openmp/libomptarget/test/ompt/veccopy_map.c
@@ -4,8 +4,6 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
-// UNSUPPORTED: s390x-ibm-linux-gnu
-// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that shows that map callbacks are not supported.