diff --git a/.github/workflows/sanity-checks.yml b/.github/workflows/gcc-sanity-checks.yml
similarity index 78%
rename from .github/workflows/sanity-checks.yml
rename to .github/workflows/gcc-sanity-checks.yml
index 9dc3e314..60054275 100644
--- a/.github/workflows/sanity-checks.yml
+++ b/.github/workflows/gcc-sanity-checks.yml
@@ -270,4 +270,80 @@ jobs:
         export CXX=g++
         cmake -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=ON ./test/sanity-check/c++17
         gcc --version
+        make
+
+  build-gcc-cpp20-linux-STL:
+    name: GCC C++20 Linux STL
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-22.04]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Build
+      run: |
+        git fetch
+        export CC=gcc
+        export CXX=g++
+        cmake -DNO_STL=OFF -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF ./test/sanity-check/c++20
+        gcc --version
+        make
+
+  build-gcc-cpp20-linux-No-STL:
+    name: GCC C++20 Linux No STL 
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-22.04]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Build
+      run: |
+        git fetch
+        export CC=gcc
+        export CXX=g++
+        cmake -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=OFF ./test/sanity-check/c++20
+        gcc --version
+        make
+
+  build-gcc-cpp20-linux-STL-Force-CPP03:
+    name: GCC C++20 Linux STL Force C++03
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-22.04]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Build
+      run: |
+        git fetch
+        export CC=gcc
+        export CXX=g++
+        cmake -DNO_STL=OFF -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=ON ./test/sanity-check/c++20
+        gcc --version
+        make
+
+  build-gcc-cpp20-linux-No-STL-Force-CPP03:
+    name: GCC C++20 Linux No STL Force C++03
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-22.04]
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Build
+      run: |
+        git fetch
+        export CC=gcc
+        export CXX=g++
+        cmake -DNO_STL=ON -DETL_USE_TYPE_TRAITS_BUILTINS=OFF -DETL_USER_DEFINED_TYPE_TRAITS=OFF -DETL_FORCE_TEST_CPP03_IMPLEMENTATION=ON ./test/sanity-check/c++20
+        gcc --version
         make
\ No newline at end of file
diff --git a/test/sanity-check/c++20/CMakeLists.txt b/test/sanity-check/c++20/CMakeLists.txt
new file mode 100644
index 00000000..c91c46fe
--- /dev/null
+++ b/test/sanity-check/c++20/CMakeLists.txt
@@ -0,0 +1,295 @@
+cmake_minimum_required(VERSION 3.5.0)
+project(etl_20sanity_tests)
+
+add_definitions(-DETL_DEBUG)
+
+option(NO_STL "No STL" OFF)
+
+message(STATUS "Compiling for C++20")
+
+if (NO_STL)
+	message(STATUS "Compiling for No STL")
+	add_definitions(-DETL_NO_STL)
+else()
+	message(STATUS "Compiling for STL")
+endif()
+
+if (ETL_USE_TYPE_TRAITS_BUILTINS)
+	message(STATUS "Compiling for built-in type traits")
+	add_definitions(-DETL_USE_TYPE_TRAITS_BUILTINS)
+endif()
+
+if (ETL_USER_DEFINED_TYPE_TRAITS)
+	message(STATUS "Compiling for user defined type traits")
+	add_definitions(-DETL_USER_DEFINED_TYPE_TRAITS)
+endif()
+
+if (ETL_FORCE_TEST_CPP03_IMPLEMENTATION)
+	message(STATUS "Force C++03 implementations")
+	add_definitions(-DETL_FORCE_TEST_CPP03_IMPLEMENTATION)
+endif()
+
+add_library(t20 OBJECT)
+target_compile_definitions(t20 PRIVATE __STDC_LIMIT_MACROS __STDC_CONSTANT_MACROS __STDC_FORMAT_MACROS)
+target_include_directories(t20 PRIVATE "")
+target_include_directories(t20 SYSTEM PRIVATE ../../../include)
+set_target_properties(t20 PROPERTIES
+        CXX_STANDARD 20
+        CXX_STANDARD_REQUIRED ON
+        CXX_EXTENSIONS ON
+        )
+target_sources(t20 PRIVATE etl_profile.h
+        ../absolute.h.t.cpp
+        ../algorithm.h.t.cpp
+        ../alignment.h.t.cpp
+        ../array.h.t.cpp
+        ../array_view.h.t.cpp
+        ../array_wrapper.h.t.cpp
+        ../atomic.h.t.cpp
+        ../basic_format_spec.h.t.cpp
+        ../basic_string.h.t.cpp
+        ../basic_string_stream.h.t.cpp
+        ../binary.h.t.cpp
+        ../bip_buffer_spsc_atomic.h.t.cpp
+        ../bit.h.t.cpp
+        ../bitset_legacy.h.t.cpp
+        ../bitset_new.h.t.cpp
+        ../bit_stream.h.t.cpp
+        ../byte.h.t.cpp
+        ../byte_stream.h.t.cpp
+        ../bloom_filter.h.t.cpp
+        ../bresenham_line.h.t.cpp
+        ../buffer_descriptors.h.t.cpp
+        ../callback.h.t.cpp
+        ../callback_service.h.t.cpp
+        ../callback_timer.h.t.cpp
+        ../callback_timer_atomic.h.t.cpp
+        ../callback_timer_interrupt.h.t.cpp
+        ../callback_timer_locked.h.t.cpp
+        ../char_traits.h.t.cpp
+        ../checksum.h.t.cpp
+        ../circular_buffer.h.t.cpp
+        ../circular_iterator.h.t.cpp
+        ../combinations.h.t.cpp
+        ../compare.h.t.cpp
+        ../constant.h.t.cpp
+        ../container.h.t.cpp
+        ../correlation.h.t.cpp
+        ../covariance.h.t.cpp
+        ../crc16.h.t.cpp
+        ../crc16_a.h.t.cpp
+        ../crc16_arc.h.t.cpp
+        ../crc16_aug_ccitt.h.t.cpp
+        ../crc16_buypass.h.t.cpp
+        ../crc16_ccitt.h.t.cpp
+        ../crc16_cdma2000.h.t.cpp
+        ../crc16_dds110.h.t.cpp
+        ../crc16_dectr.h.t.cpp
+        ../crc16_dectx.h.t.cpp
+        ../crc16_dnp.h.t.cpp
+        ../crc16_en13757.h.t.cpp
+        ../crc16_genibus.h.t.cpp
+        ../crc16_kermit.h.t.cpp
+        ../crc16_m17.h.t.cpp
+        ../crc16_maxim.h.t.cpp
+        ../crc16_mcrf4xx.h.t.cpp
+        ../crc16_modbus.h.t.cpp
+        ../crc16_profibus.h.t.cpp
+        ../crc16_riello.h.t.cpp
+        ../crc16_t10dif.h.t.cpp
+        ../crc16_teledisk.h.t.cpp
+        ../crc16_tms37157.h.t.cpp
+        ../crc16_usb.h.t.cpp
+        ../crc16_x25.h.t.cpp
+        ../crc16_xmodem.h.t.cpp
+        ../crc32.h.t.cpp
+        ../crc32_bzip2.h.t.cpp
+        ../crc32_c.h.t.cpp
+        ../crc32_d.h.t.cpp
+        ../crc32_jamcrc.h.t.cpp
+        ../crc32_mpeg2.h.t.cpp
+        ../crc32_posix.h.t.cpp
+        ../crc32_q.h.t.cpp
+        ../crc32_xfer.h.t.cpp
+        ../crc64_ecma.h.t.cpp
+        ../crc8_ccitt.h.t.cpp
+        ../crc8_cdma2000.h.t.cpp
+        ../crc8_darc.h.t.cpp
+        ../crc8_dvbs2.h.t.cpp
+        ../crc8_ebu.h.t.cpp
+        ../crc8_icode.h.t.cpp
+        ../crc8_itu.h.t.cpp
+        ../crc8_maxim.h.t.cpp
+        ../crc8_rohc.h.t.cpp
+        ../crc8_wcdma.h.t.cpp
+        ../cyclic_value.h.t.cpp
+        ../debounce.h.t.cpp
+        ../debug_count.h.t.cpp
+        ../delegate.h.t.cpp
+        ../delegate_service.h.t.cpp
+        ../deque.h.t.cpp
+        ../endianness.h.t.cpp
+        ../enum_type.h.t.cpp
+        ../error_handler.h.t.cpp
+        ../exception.h.t.cpp
+        ../expected.h.t.cpp
+        ../factorial.h.t.cpp
+        ../fibonacci.h.t.cpp
+        ../file_error_numbers.h.t.cpp
+        ../fixed_iterator.h.t.cpp
+        ../fixed_sized_memory_block_allocator.h.t.cpp
+        ../flags.h.t.cpp
+        ../flat_map.h.t.cpp
+        ../flat_multimap.h.t.cpp
+        ../flat_multiset.h.t.cpp
+        ../flat_set.h.t.cpp
+        ../fnv_1.h.t.cpp
+        ../format_spec.h.t.cpp
+        ../forward_list.h.t.cpp
+        ../frame_check_sequence.h.t.cpp
+        ../fsm.h.t.cpp
+        ../function.h.t.cpp
+        ../functional.h.t.cpp
+        ../gamma.h.t.cpp
+        ../generic_pool.h.t.cpp
+        ../hash.h.t.cpp
+        ../ihash.h.t.cpp
+        ../histogram.h.t.cpp
+        ../imemory_block_allocator.h.t.cpp
+        ../indirect_vector.h.t.cpp
+        ../initializer_list.h.t.cpp
+        ../instance_count.h.t.cpp
+        ../integral_limits.h.t.cpp
+        ../intrusive_forward_list.h.t.cpp
+        ../intrusive_links.h.t.cpp
+        ../intrusive_list.h.t.cpp
+        ../intrusive_queue.h.t.cpp
+        ../intrusive_stack.h.t.cpp
+        ../io_port.h.t.cpp
+        ../ipool.h.t.cpp
+        ../ireference_counted_message_pool.h.t.cpp
+        ../iterator.h.t.cpp
+        ../jenkins.h.t.cpp
+        ../largest.h.t.cpp
+        ../limiter.h.t.cpp
+        ../limits.h.t.cpp
+        ../list.h.t.cpp
+        ../log.h.t.cpp
+        ../macros.h.t.cpp
+        ../map.h.t.cpp
+        ../math_constants.h.t.cpp
+        ../mean.h.t.cpp
+        ../mem_cast.h.t.cpp
+        ../memory.h.t.cpp
+        ../memory_model.h.t.cpp
+        ../message.h.t.cpp
+        ../message_broker.h.t.cpp
+        ../message_bus.h.t.cpp
+        ../message_packet.h.t.cpp
+        ../message_router.h.t.cpp
+        ../message_router_registry.h.t.cpp
+        ../message_timer.h.t.cpp
+        ../message_timer_atomic.h.t.cpp
+        ../message_timer_interrupt.h.t.cpp
+        ../message_timer_locked.h.t.cpp
+        ../message_types.h.t.cpp
+        ../multimap.h.t.cpp
+        ../multiset.h.t.cpp
+        ../multi_array.h.t.cpp
+        ../multi_range.h.t.cpp
+        ../multi_span.h.t.cpp
+        ../multi_vector.h.t.cpp
+        ../murmur3.h.t.cpp
+        ../mutex.h.t.cpp
+        ../negative.h.t.cpp
+        ../nth_type.h.t.cpp
+        ../nullptr.h.t.cpp
+        ../null_type.h.t.cpp
+        ../numeric.h.t.cpp
+        ../observer.h.t.cpp
+        ../optional.h.t.cpp
+        ../overload.h.t.cpp
+        ../packet.h.t.cpp
+        ../parameter_pack.h.t.cpp
+        ../parameter_type.h.t.cpp
+        ../pearson.h.t.cpp
+        ../permutations.h.t.cpp
+        ../placement_new.h.t.cpp
+        ../platform.h.t.cpp
+        ../poly_span.h.t.cpp
+        ../pool.h.t.cpp
+        ../power.h.t.cpp
+        ../priority_queue.h.t.cpp
+        ../pseudo_moving_average.h.t.cpp
+        ../quantize.h.t.cpp
+        ../queue.h.t.cpp
+        ../queue_lockable.h.t.cpp
+        ../queue_mpmc_mutex.h.t.cpp
+        ../queue_spsc_atomic.h.t.cpp
+        ../queue_spsc_isr.h.t.cpp
+        ../queue_spsc_locked.h.t.cpp
+        ../radix.h.t.cpp
+        ../random.h.t.cpp
+        ../ratio.h.t.cpp
+        ../reference_counted_message.h.t.cpp
+        ../reference_counted_message_pool.h.t.cpp
+        ../reference_counted_object.h.t.cpp
+        ../reference_flat_map.h.t.cpp
+        ../reference_flat_multimap.h.t.cpp
+        ../reference_flat_multiset.h.t.cpp
+        ../reference_flat_set.h.t.cpp
+        ../rescale.h.t.cpp
+        ../rms.h.t.cpp
+        ../scaled_rounding.h.t.cpp
+        ../scheduler.h.t.cpp
+        ../set.h.t.cpp
+        ../shared_message.h.t.cpp
+        ../singleton.h.t.cpp
+        ../smallest.h.t.cpp
+        ../span.h.t.cpp
+        ../sqrt.h.t.cpp
+        ../stack.h.t.cpp
+        ../standard_deviation.h.t.cpp
+        ../state_chart.h.t.cpp
+        ../static_assert.h.t.cpp
+        ../string.h.t.cpp
+        ../string_stream.h.t.cpp
+        ../string_utilities.h.t.cpp
+        ../string_view.h.t.cpp
+        ../successor.h.t.cpp
+        ../task.h.t.cpp
+        ../threshold.h.t.cpp
+        ../timer.h.t.cpp
+        ../to_arithmetic.h.t.cpp
+        ../to_string.h.t.cpp
+        ../to_u16string.h.t.cpp
+        ../to_u32string.h.t.cpp
+        ../to_wstring.h.t.cpp
+        ../type_def.h.t.cpp
+        ../type_lookup.h.t.cpp
+        ../type_select.h.t.cpp
+        ../type_traits.h.t.cpp
+        ../u16format_spec.h.t.cpp
+        ../u16string.h.t.cpp
+        ../u16string_stream.h.t.cpp
+        ../u32format_spec.h.t.cpp
+        ../u32string.h.t.cpp
+        ../u32string_stream.h.t.cpp
+        ../unaligned_type.h.t.cpp
+        ../unordered_map.h.t.cpp
+        ../unordered_multimap.h.t.cpp
+        ../unordered_multiset.h.t.cpp
+        ../unordered_set.h.t.cpp
+        ../user_type.h.t.cpp
+        ../utility.h.t.cpp
+        ../variance.h.t.cpp
+        ../variant_legacy.h.t.cpp
+        ../variant_variadic.h.t.cpp
+        ../variant_pool.h.t.cpp
+        ../vector.h.t.cpp
+        ../version.h.t.cpp
+        ../visitor.h.t.cpp
+        ../wformat_spec.h.t.cpp
+        ../wstring.h.t.cpp
+        ../wstring_stream.h.t.cpp
+        )
diff --git a/test/sanity-check/c++20/etl_profile.h b/test/sanity-check/c++20/etl_profile.h
new file mode 100644
index 00000000..ab630f66
--- /dev/null
+++ b/test/sanity-check/c++20/etl_profile.h
@@ -0,0 +1,69 @@
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+https://github.com/ETLCPP/etl
+https://www.etlcpp.com
+
+Copyright(c) 2021 Bo Rydberg
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef __ETL_PROFILE_H__
+#define __ETL_PROFILE_H__
+
+#define ETL_TARGET_DEVICE_GENERIC
+#define ETL_TARGET_OS_NONE
+#define ETL_CPP11_SUPPORTED 1
+#define ETL_CPP14_SUPPORTED 1
+#define ETL_CPP17_SUPPORTED 1
+#define ETL_CPP20_SUPPORTED 1
+#define ETL_IN_UNIT_TEST
+#define ETL_CALLBACK_TIMER_USE_INTERRUPT_LOCK
+#define ETL_CALLBACK_TIMER_DISABLE_INTERRUPTS
+#define ETL_CALLBACK_TIMER_ENABLE_INTERRUPTS
+#define ETL_MESSAGE_TIMER_USE_INTERRUPT_LOCK
+#define ETL_MESSAGE_TIMER_DISABLE_INTERRUPTS
+#define ETL_MESSAGE_TIMER_ENABLE_INTERRUPTS
+
+#if defined(ETL_FORCE_TEST_CPP03_IMPLEMENTATION)
+  #define ETL_FUNCTION_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_PRIORITY_QUEUE_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_QUEUE_ATOMIC_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_VARIANT_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_VECTOR_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_QUEUE_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_QUEUE_MPMC_MUTEX_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_QUEUE_ISR_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_QUEUE_LOCKED_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_OPTIONAL_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_LARGEST_TYPE_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_TYPE_SELECT_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_UNINITIALIZED_BUFFER_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_CRC_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_MEM_CAST_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_MESSAGE_PACKET_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_OBSERVER_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_MESSAGE_ROUTER_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_FSM_FORCE_CPP03_IMPLEMENTATION
+  #define ETL_SINGLETON_FORCE_CPP03_IMPLEMENTATION
+#endif
+
+#endif
diff --git a/test/vs2022/etl.vcxproj b/test/vs2022/etl.vcxproj
index 8a5ddd22..14f6d4a8 100644
--- a/test/vs2022/etl.vcxproj
+++ b/test/vs2022/etl.vcxproj
@@ -3071,6 +3071,7 @@
     <ClInclude Include="..\sanity-check\c++11\etl_profile.h" />
     <ClInclude Include="..\sanity-check\c++14\etl_profile.h" />
     <ClInclude Include="..\sanity-check\c++17\etl_profile.h" />
+    <ClInclude Include="..\sanity-check\c++20\etl_profile.h" />
     <ClInclude Include="..\unittest++\AssertException.h" />
     <ClInclude Include="..\unittest++\CheckMacros.h" />
     <ClInclude Include="..\unittest++\Checks.h" />
@@ -13592,6 +13593,7 @@
     <Text Include="..\sanity-check\c++11\CMakeLists.txt" />
     <Text Include="..\sanity-check\c++14\CMakeLists.txt" />
     <Text Include="..\sanity-check\c++17\CMakeLists.txt" />
+    <Text Include="..\sanity-check\c++20\CMakeLists.txt" />
     <Text Include="..\sanity-check\log.txt" />
   </ItemGroup>
   <ItemGroup>