diff --git a/sycl/test-e2e/DeviceCodeSplit/grf.cpp b/sycl/test-e2e/DeviceCodeSplit/grf.cpp
index 1e5b085d207d..aa25f5b0fde7 100644
--- a/sycl/test-e2e/DeviceCodeSplit/grf.cpp
+++ b/sycl/test-e2e/DeviceCodeSplit/grf.cpp
@@ -17,6 +17,10 @@
 // XFAIL: arch-intel_gpu_pvc
 // XFAIL-TRACKER: https://github.com/intel/llvm/issues/16401
 
+// Flaky pass/fail behaviour.
+// UNSUPPORTED: spirv-backend
+// UNSUPPORTED-TRACKER: CMPLRLLVM-64705
+
 // RUN: %{build} -Wno-error=deprecated-declarations -o %t1.out
 // RUN: env SYCL_UR_TRACE=2 %{run} %t1.out 2>&1 | FileCheck %s --check-prefixes=CHECK,CHECK-NO-VAR
 // RUN: env SYCL_PROGRAM_COMPILE_OPTIONS="-g" SYCL_UR_TRACE=2 %{run} %t1.out 2>&1 | FileCheck %s --check-prefixes=CHECK,CHECK-WITH-VAR
diff --git a/sycl/test-e2e/syclcompat/launch/launch_policy_lmem.cpp b/sycl/test-e2e/syclcompat/launch/launch_policy_lmem.cpp
index 033f5c99d74e..fdf3a10fdc58 100644
--- a/sycl/test-e2e/syclcompat/launch/launch_policy_lmem.cpp
+++ b/sycl/test-e2e/syclcompat/launch/launch_policy_lmem.cpp
@@ -29,6 +29,10 @@
 // XFAIL: arch-intel_gpu_pvc
 // XFAIL-TRACKER: https://github.com/intel/llvm/issues/16401
 
+// Flaky pass/fail behaviour.
+// UNSUPPORTED: spirv-backend
+// UNSUPPORTED-TRACKER: CMPLRLLVM-64705
+
 #include <sycl/detail/core.hpp>
 #include <sycl/ext/oneapi/properties/properties.hpp>
 #include <sycl/group_barrier.hpp>