diff --git a/.github/test.sh b/.github/test.sh
index a744f6d5b08..cf69ebee955 100755
--- a/.github/test.sh
+++ b/.github/test.sh
@@ -3,11 +3,10 @@
 FACTOR=$1
 set -ex
 cd Polyhedron/demo
-LIST_OF_PLUGINS=$(/usr/local/bin/cmake --build . -t help | egrep 'plugin$' |& cut -d\  -f2)
+/usr/local/bin/cmake -S Polyhedron -B build -DCGAL_DIR=$2
+LIST_OF_PLUGINS=$(/usr/local/bin/cmake --build build -t help | egrep 'plugin$' |& cut -d\  -f2)
 PLUGINS_ARRAY=(${LIST_OF_PLUGINS});
 NB_OF_PLUGINS=${#PLUGINS_ARRAY[@]}
 DEL=$(($NB_OF_PLUGINS / 4))
-mkdir build
 cd build
-/usr/local/bin/cmake -DCGAL_DIR=$2 ../Polyhedron
 make -j2 ${PLUGINS_ARRAY[@]:$(($FACTOR * $DEL)):$((($FACTOR + 1) * $DEL))}