diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3a4a1689..142929b6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -33,7 +33,7 @@ jobs:
           - name: ubu24-analyzers
             os: ubuntu-24.04
             coverage: true
-            extra_cmake_flags: -DCMAKE_BUILD_TYPE=Debug
+            debug: on
             micromamba_shell_init: bash
           - name: ubu22
             os: ubuntu-22.04
@@ -41,6 +41,10 @@ jobs:
           - name: ubu22-arm
             os: ubuntu-22.04-arm
             micromamba_shell_init: bash
+          - name: ubu22-arm-valgrind
+            os: ubuntu-22.04-arm
+            debug: on
+            micromamba_shell_init: bash
           - name: osx15-x86
             os: macos-15-intel
             micromamba_shell_init: bash
@@ -77,6 +81,9 @@ jobs:
         if: ${{ runner.os != 'windows' }}
         run: |
           os="${{ matrix.os }}"
+          if [[ "${{ matrix.debug }}" == "on" ]]; then
+            echo "BUILD_TYPE=Debug" >> $GITHUB_ENV
+          fi
           if [[ "${os}" == "macos"* ]]; then
             echo "ncpus=$(sysctl -n hw.ncpu)" >> $GITHUB_ENV
           else
@@ -114,7 +121,7 @@ jobs:
            -DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX \
            -DXEUS_CPP_ENABLE_CODE_COVERAGE=${{ matrix.coverage }} \
           -DCMAKE_COMPILE_WARNING_AS_ERROR=ON            \
-           ${{ matrix.extra_cmake_flags }} 
+           -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }}
 
       - name: build, run C++ tests & install
         if: ${{ runner.os == 'windows' }}
@@ -133,6 +140,21 @@ jobs:
           cd build
           make install -j ${{ env.ncpus }}
           make -j ${{ env.ncpus }} check-xeus-cpp
+          if [[ "${{ matrix.os }}" != "macos"* && "${{ matrix.debug }}" == "on" ]]; then
+              sudo apt update
+              sudo apt install libc6-dbg
+              micromamba install -c conda-forge valgrind
+              if [[ "${{ matrix.os }}" == *"arm"* ]]; then
+                SUPPRESSION_FILE="${{ github.workspace }}/etc/xeus-cpp-valgrind_arm.supp"
+              else
+                SUPPRESSION_FILE="${{ github.workspace }}/etc/xeus-cpp-valgrind_x86.supp"
+              fi
+              valgrind --show-error-list=yes --track-origins=yes --error-exitcode=1 \
+                --show-leak-kinds=definite,possible \
+                --gen-suppressions=all \
+                --suppressions="${SUPPRESSION_FILE}" \
+                test/test_xeus_cpp
+          fi
 
       - name: Python tests Unix Systems
         if: ${{ runner.os != 'windows' }}
diff --git a/etc/xeus-cpp-valgrind_arm.supp b/etc/xeus-cpp-valgrind_arm.supp
new file mode 100644
index 00000000..fab92aa5
--- /dev/null
+++ b/etc/xeus-cpp-valgrind_arm.supp
@@ -0,0 +1,43 @@
+{
+ Suppression 1
+ Memcheck:Addr8
+ fun:__GI_memcpy
+ fun:_ZN4xcpp11interpreter20inspect_request_implERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN4xeus12xinterpreter15inspect_requestERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN21DOCTEST_ANON_SUITE_11L20DOCTEST_ANON_FUNC_14Ev
+ fun:_ZN7doctest7Context3runEv
+ fun:main
+}
+
+{
+ Suppression 2
+ Memcheck:Addr2
+ fun:__GI_memcpy
+ fun:_ZN4xcpp11interpreter20inspect_request_implERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN4xeus12xinterpreter15inspect_requestERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN21DOCTEST_ANON_SUITE_11L20DOCTEST_ANON_FUNC_14Ev
+ fun:_ZN7doctest7Context3runEv
+ fun:main
+}
+
+{
+ Suppression 3
+ Memcheck:Overlap
+ fun:__GI_memcpy
+ fun:_ZN4xcpp11interpreter20inspect_request_implERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN4xeus12xinterpreter15inspect_requestERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN21DOCTEST_ANON_SUITE_11L20DOCTEST_ANON_FUNC_12Ev
+ fun:_ZN7doctest7Context3runEv
+ fun:main
+}
+
+{
+ Suppression 4
+ Memcheck:Addr1
+ fun:__GI_memcpy
+ fun:_ZN4xcpp11interpreter20inspect_request_implERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN4xeus12xinterpreter15inspect_requestERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN21DOCTEST_ANON_SUITE_11L20DOCTEST_ANON_FUNC_14Ev
+ fun:_ZN7doctest7Context3runEv
+ fun:main
+}
diff --git a/etc/xeus-cpp-valgrind_x86.supp b/etc/xeus-cpp-valgrind_x86.supp
new file mode 100644
index 00000000..ca73ebdd
--- /dev/null
+++ b/etc/xeus-cpp-valgrind_x86.supp
@@ -0,0 +1,73 @@
+{
+ Suppression 1
+ Memcheck:Addr8
+ fun:memmove
+ fun:copy
+ fun:_S_copy
+ fun:_S_copy_chars
+ fun:_S_copy_chars
+ fun:_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_M_constructIN9__gnu_cxx17__normal_iteratorIPKcS4_EEEEvT_SB_St20forward_iterator_tag.isra.0
+ fun:basic_string<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char> > >
+ fun:str
+ fun:operator std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char> > >::string_type
+ fun:_ZN4xcpp11interpreter20inspect_request_implERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN4xeus12xinterpreter15inspect_requestERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN21DOCTEST_ANON_SUITE_11L20DOCTEST_ANON_FUNC_14Ev
+ fun:_ZN7doctest7Context3runEv
+ fun:main
+}
+
+{
+ Suppression 2
+ Memcheck:Addr2
+ fun:memmove
+ fun:copy
+ fun:_S_copy
+ fun:_S_copy_chars
+ fun:_S_copy_chars
+ fun:_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_M_constructIN9__gnu_cxx17__normal_iteratorIPKcS4_EEEEvT_SB_St20forward_iterator_tag.isra.0
+ fun:basic_string<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char> > >
+ fun:str
+ fun:operator std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char> > >::string_type
+ fun:_ZN4xcpp11interpreter20inspect_request_implERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN4xeus12xinterpreter15inspect_requestERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN21DOCTEST_ANON_SUITE_11L20DOCTEST_ANON_FUNC_14Ev
+ fun:_ZN7doctest7Context3runEv
+ fun:main
+}
+
+{
+ Suppression 3
+ Memcheck:Cond
+ fun:_ZN4llvm5APInt7setBitsEjj
+ fun:_ZL16computeKnownBitsPKN4llvm5ValueERKNS_5APIntERNS_9KnownBitsEjRKNS_13SimplifyQueryE
+ fun:_ZN4llvm16computeKnownBitsEPKNS_5ValueERNS_9KnownBitsERKNS_10DataLayoutEjPNS_15AssumptionCacheEPKNS_11InstructionEPKNS_13DominatorTreeEb
+ fun:_ZNK4llvm12SelectionDAG13InferPtrAlignENS_7SDValueE
+ fun:_ZN12_GLOBAL__N_111DAGCombiner9visitLOADEPN4llvm6SDNodeE
+ fun:_ZN12_GLOBAL__N_111DAGCombiner7combineEPN4llvm6SDNodeE
+ fun:_ZN4llvm12SelectionDAG7CombineENS_12CombineLevelEPNS_14BatchAAResultsENS_15CodeGenOptLevelE
+ fun:_ZN4llvm16SelectionDAGISel17CodeGenAndEmitDAGEv
+ fun:_ZN4llvm16SelectionDAGISel20SelectAllBasicBlocksERKNS_8FunctionE
+ fun:_ZN4llvm16SelectionDAGISel20runOnMachineFunctionERNS_15MachineFunctionE
+ fun:_ZN4llvm22SelectionDAGISelLegacy20runOnMachineFunctionERNS_15MachineFunctionE
+ fun:_ZN4llvm19MachineFunctionPass13runOnFunctionERNS_8FunctionE.part.0
+}
+
+{
+ Suppression 4
+ Memcheck:Addr1
+ fun:memmove
+ fun:copy
+ fun:_S_copy
+ fun:_S_copy_chars
+ fun:_S_copy_chars
+ fun:_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_M_constructIN9__gnu_cxx17__normal_iteratorIPKcS4_EEEEvT_SB_St20forward_iterator_tag.isra.0
+ fun:basic_string<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char> > >
+ fun:str
+ fun:operator std::__cxx11::sub_match<__gnu_cxx::__normal_iterator<char const*, std::__cxx11::basic_string<char> > >::string_type
+ fun:_ZN4xcpp11interpreter20inspect_request_implERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN4xeus12xinterpreter15inspect_requestERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEii
+ fun:_ZN21DOCTEST_ANON_SUITE_11L20DOCTEST_ANON_FUNC_14Ev
+ fun:_ZN7doctest7Context3runEv
+ fun:main
+}