diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a862660a..0b4c60bc 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -55,6 +55,7 @@ build_win:
         cmake %SRC_DIR%
         -G Ninja
         -DCMAKE_INSTALL_PREFIX=%INSTALL_DIR%
+        -DCHECK_RANGE=ON
         -DUSE_CGNS=ON
         -DUSE_OCC=ON
         -DOCC_LIBRARY=C:/install_opencascade_7.4.0_static/win64/vc14/lib/TKernel.lib
@@ -238,6 +239,7 @@ build_mac:
         cmake $SRC_DIR
         -DCMAKE_INSTALL_PREFIX=$CMAKE_INSTALL_PREFIX
         -DCMAKE_BUILD_TYPE=Release
+        -DCHECK_RANGE=ON
         -DUSE_NATIVE_ARCH=OFF
         -DUSE_CCACHE=ON
         -DENABLE_UNIT_TESTS=ON
diff --git a/tests/build_debug.sh b/tests/build_debug.sh
index 349722d8..e779b381 100755
--- a/tests/build_debug.sh
+++ b/tests/build_debug.sh
@@ -6,6 +6,7 @@ cmake \
     -DBUILD_TYPE=DEBUG \
     -DENABLE_UNIT_TESTS=ON \
     -DUSE_OCC=ON \
+    -DCHECK_RANGE=ON \
     -DUSE_CGNS=ON \
     ../../src/netgen
 make -j12
diff --git a/tests/build_mpi.sh b/tests/build_mpi.sh
index 190423ac..0e26af94 100644
--- a/tests/build_mpi.sh
+++ b/tests/build_mpi.sh
@@ -1,6 +1,10 @@
 cd
 mkdir -p build/netgen
 cd build/netgen
-cmake ../../src/netgen -DUSE_CCACHE=ON -DUSE_MPI=ON -DENABLE_UNIT_TESTS=ON
+cmake ../../src/netgen \
+  -DCHECK_RANGE=ON \
+  -DUSE_CCACHE=ON \
+  -DUSE_MPI=ON \
+  -DENABLE_UNIT_TESTS=ON
 make -j12
 make install
diff --git a/tests/build_ngsolve.sh b/tests/build_ngsolve.sh
index a25a628a..d452d2da 100755
--- a/tests/build_ngsolve.sh
+++ b/tests/build_ngsolve.sh
@@ -3,6 +3,7 @@ git clone https://github.com/NGSolve/ngsolve.git
 mkdir -p ~/build/ngsolve
 cd ~/build/ngsolve
 cmake \
+  -DCHECK_RANGE=ON \
   -DUSE_MKL=ON \
   -DUSE_CCACHE=ON \
   -DNETGEN_DIR=/opt/netgen \