diff --git a/level_zero/core/test/unit_tests/experimental/test_graph_export.h b/level_zero/core/test/unit_tests/experimental/test_graph_export.h
index b36fe6a880..ef894b28a6 100644
--- a/level_zero/core/test/unit_tests/experimental/test_graph_export.h
+++ b/level_zero/core/test/unit_tests/experimental/test_graph_export.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/test/common/helpers/variable_backup.h"
 #include "shared/test/common/mocks/mock_io_functions.h"
 
diff --git a/level_zero/core/test/unit_tests/mocks/mock_cmdqueue_handle_indirect_allocs.h b/level_zero/core/test/unit_tests/mocks/mock_cmdqueue_handle_indirect_allocs.h
index 103f4503a5..667d060eea 100644
--- a/level_zero/core/test/unit_tests/mocks/mock_cmdqueue_handle_indirect_allocs.h
+++ b/level_zero/core/test/unit_tests/mocks/mock_cmdqueue_handle_indirect_allocs.h
@@ -1,10 +1,11 @@
 /*
- * Copyright (C) 2024 Intel Corporation
+ * Copyright (C) 2024-2025 Intel Corporation
  *
  * SPDX-License-Identifier: MIT
  *
  */
 
+#pragma once
 #include "level_zero/core/test/unit_tests/mocks/mock_cmdqueue.h"
 
 namespace L0 {
diff --git a/level_zero/include/level_zero/ze_intel_results.h b/level_zero/include/level_zero/ze_intel_results.h
index 0793289bcf..e40440f9da 100644
--- a/level_zero/include/level_zero/ze_intel_results.h
+++ b/level_zero/include/level_zero/ze_intel_results.h
@@ -5,6 +5,10 @@
  *
  */
 
+#if defined(__cplusplus)
+#pragma once
+#endif
+
 #ifndef _ZE_INTEL_RESULTS_H
 #define _ZE_INTEL_RESULTS_H
 
diff --git a/level_zero/include/level_zero/ze_stypes.h b/level_zero/include/level_zero/ze_stypes.h
index e0373b498a..5965b6408d 100644
--- a/level_zero/include/level_zero/ze_stypes.h
+++ b/level_zero/include/level_zero/ze_stypes.h
@@ -5,6 +5,10 @@
  *
  */
 
+#if defined(__cplusplus)
+#pragma once
+#endif
+
 #ifndef _ZE_STYPES_H
 #define _ZE_STYPES_H
 
diff --git a/level_zero/tools/source/debug/linux/debug_session_factory.h b/level_zero/tools/source/debug/linux/debug_session_factory.h
index 60640b7fde..087b3f7cb8 100644
--- a/level_zero/tools/source/debug/linux/debug_session_factory.h
+++ b/level_zero/tools/source/debug/linux/debug_session_factory.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "level_zero/tools/source/debug/debug_session.h"
 
 namespace L0 {
diff --git a/level_zero/tools/source/metrics/linux/os_metric_ip_sampling_imp_linux.h b/level_zero/tools/source/metrics/linux/os_metric_ip_sampling_imp_linux.h
index d3a6a061b6..de3fca3c51 100644
--- a/level_zero/tools/source/metrics/linux/os_metric_ip_sampling_imp_linux.h
+++ b/level_zero/tools/source/metrics/linux/os_metric_ip_sampling_imp_linux.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "level_zero/tools/source/metrics/os_interface_metric.h"
 
 namespace L0 {
diff --git a/level_zero/tools/test/unit_tests/sources/debug/linux/prelim/debug_session_fixtures_linux.h b/level_zero/tools/test/unit_tests/sources/debug/linux/prelim/debug_session_fixtures_linux.h
index 405aef9ef4..5f744aa9ad 100644
--- a/level_zero/tools/test/unit_tests/sources/debug/linux/prelim/debug_session_fixtures_linux.h
+++ b/level_zero/tools/test/unit_tests/sources/debug/linux/prelim/debug_session_fixtures_linux.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/debugger/DebuggerStateSaveHeader.h"
 #include "shared/source/device/device.h"
 #include "shared/source/os_interface/linux/drm_debug.h"
diff --git a/level_zero/tools/test/unit_tests/sources/debug/linux/xe/debug_session_fixtures_linux_xe.h b/level_zero/tools/test/unit_tests/sources/debug/linux/xe/debug_session_fixtures_linux_xe.h
index e2b4626941..ee7e941d0f 100644
--- a/level_zero/tools/test/unit_tests/sources/debug/linux/xe/debug_session_fixtures_linux_xe.h
+++ b/level_zero/tools/test/unit_tests/sources/debug/linux/xe/debug_session_fixtures_linux_xe.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/debugger/DebuggerStateSaveHeader.h"
 #include "shared/source/os_interface/linux/drm_debug.h"
 #include "shared/source/os_interface/linux/xe/eudebug/eudebug_interface_upstream.h"
diff --git a/opencl/source/sharings/gl/linux/include/gl_types.h b/opencl/source/sharings/gl/linux/include/gl_types.h
index f2437adb0b..d59509163c 100644
--- a/opencl/source/sharings/gl/linux/include/gl_types.h
+++ b/opencl/source/sharings/gl/linux/include/gl_types.h
@@ -1,10 +1,11 @@
 /*
- * Copyright (C) 2022-2024 Intel Corporation
+ * Copyright (C) 2022-2025 Intel Corporation
  *
  * SPDX-License-Identifier: MIT
  *
  */
 
+#pragma once
 #include <EGL/egl.h>
 
 typedef void *GLDisplay;
diff --git a/opencl/test/unit_test/aub_tests/fixtures/aub_walker_partition_fixture.h b/opencl/test/unit_test/aub_tests/fixtures/aub_walker_partition_fixture.h
index 90fa2b89ed..f1604c2cd0 100644
--- a/opencl/test/unit_test/aub_tests/fixtures/aub_walker_partition_fixture.h
+++ b/opencl/test/unit_test/aub_tests/fixtures/aub_walker_partition_fixture.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/command_container/walker_partition_xehp_and_later.h"
 #include "shared/source/helpers/timestamp_packet.h"
 #include "shared/test/common/cmd_parse/hw_parse.h"
diff --git a/opencl/test/unit_test/igdrcl_tests_pch.h b/opencl/test/unit_test/igdrcl_tests_pch.h
index f5d4a9e10c..45a83af80e 100644
--- a/opencl/test/unit_test/igdrcl_tests_pch.h
+++ b/opencl/test/unit_test/igdrcl_tests_pch.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/gmm_helper/gmm_lib.h"
 #include "shared/source/helpers/abort.h"
 #include "shared/source/helpers/completion_stamp.h"
diff --git a/opencl/test/unit_test/mocks/mock_builder.h b/opencl/test/unit_test/mocks/mock_builder.h
index 9cc5845bfa..30e469b22d 100644
--- a/opencl/test/unit_test/mocks/mock_builder.h
+++ b/opencl/test/unit_test/mocks/mock_builder.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "opencl/source/helpers/dispatch_info.h"
 #include "opencl/source/helpers/dispatch_info_builder.h"
 
diff --git a/shared/source/helpers/cpu_copy_helper.h b/shared/source/helpers/cpu_copy_helper.h
index a34d52b576..a453b1d280 100644
--- a/shared/source/helpers/cpu_copy_helper.h
+++ b/shared/source/helpers/cpu_copy_helper.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/os_interface/os_interface.h"
 
 namespace NEO {
diff --git a/shared/source/kernel/local_ids_cache.h b/shared/source/kernel/local_ids_cache.h
index 985288f8cb..4ebfa4a364 100644
--- a/shared/source/kernel/local_ids_cache.h
+++ b/shared/source/kernel/local_ids_cache.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/helpers/non_copyable_or_moveable.h"
 #include "shared/source/helpers/vec.h"
 #include "shared/source/utilities/stackvec.h"
diff --git a/shared/source/pin/linux/os_pin.h b/shared/source/pin/linux/os_pin.h
index 41efc75dcb..df92a8b856 100644
--- a/shared/source/pin/linux/os_pin.h
+++ b/shared/source/pin/linux/os_pin.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/pin/pin.h"
 
 #include <cstdint>
diff --git a/shared/source/pin/windows/os_pin.h b/shared/source/pin/windows/os_pin.h
index 8f2673d8bd..c8be220765 100644
--- a/shared/source/pin/windows/os_pin.h
+++ b/shared/source/pin/windows/os_pin.h
@@ -1,10 +1,11 @@
 /*
- * Copyright (C) 2020-2023 Intel Corporation
+ * Copyright (C) 2020-2025 Intel Corporation
  *
  * SPDX-License-Identifier: MIT
  *
  */
 
+#pragma once
 #include "shared/source/pin/pin.h"
 
 namespace NEO {
diff --git a/shared/test/common/helpers/mock_file_io.h b/shared/test/common/helpers/mock_file_io.h
index 680f745632..4731f073d2 100644
--- a/shared/test/common/helpers/mock_file_io.h
+++ b/shared/test/common/helpers/mock_file_io.h
@@ -1,10 +1,11 @@
 /*
- * Copyright (C) 2024 Intel Corporation
+ * Copyright (C) 2024-2025 Intel Corporation
  *
  * SPDX-License-Identifier: MIT
  *
  */
 
+#pragma once
 #include "shared/source/helpers/file_io.h"
 
 bool virtualFileExists(const std::string &fileName);
diff --git a/shared/test/common/mocks/mock_compiler_product_helper.h b/shared/test/common/mocks/mock_compiler_product_helper.h
index e95bd1eced..9c99a2d403 100644
--- a/shared/test/common/mocks/mock_compiler_product_helper.h
+++ b/shared/test/common/mocks/mock_compiler_product_helper.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/helpers/compiler_product_helper.h"
 #include "shared/test/common/test_macros/mock_method_macros.h"
 
diff --git a/shared/test/common/test_macros/header/heapful_test_definitions.h b/shared/test/common/test_macros/header/heapful_test_definitions.h
index a934eaa217..274e71d987 100644
--- a/shared/test/common/test_macros/header/heapful_test_definitions.h
+++ b/shared/test/common/test_macros/header/heapful_test_definitions.h
@@ -5,6 +5,8 @@
  *
  */
 
+#pragma once
+
 #define HEAPFUL_HWTEST_F(test_fixture, test_name) \
     HWTEST2_F(test_fixture, test_name, IsHeapfulRequired)
 
diff --git a/shared/test/unit_test/helpers/product_config_helper_tests.h b/shared/test/unit_test/helpers/product_config_helper_tests.h
index 18d4e8d134..a4e846fc1c 100644
--- a/shared/test/unit_test/helpers/product_config_helper_tests.h
+++ b/shared/test/unit_test/helpers/product_config_helper_tests.h
@@ -1,10 +1,11 @@
 /*
- * Copyright (C) 2022-2023 Intel Corporation
+ * Copyright (C) 2022-2025 Intel Corporation
  *
  * SPDX-License-Identifier: MIT
  *
  */
 
+#pragma once
 #include "shared/source/helpers/product_config_helper.h"
 #include "shared/test/common/test_macros/test.h"
 
diff --git a/shared/test/unit_test/release_helper/release_helper_tests_base.h b/shared/test/unit_test/release_helper/release_helper_tests_base.h
index ea6c188835..1b710de295 100644
--- a/shared/test/unit_test/release_helper/release_helper_tests_base.h
+++ b/shared/test/unit_test/release_helper/release_helper_tests_base.h
@@ -5,6 +5,7 @@
  *
  */
 
+#pragma once
 #include "shared/source/helpers/hw_ip_version.h"
 
 #include "gtest/gtest.h"