diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..91bfa25
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,3 @@
+.*
+venv
+build
diff --git a/Dockerfile b/Dockerfile
index cc36142..e15a2e6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 FROM ubuntu:20.04
-RUN apt-get update && apt-get install -y python3 python3-pip git
+RUN apt-get update && apt-get install -y python3 python3-pip git && rm -rf /var/lib/apt/lists/*
 COPY . /npf
 RUN cd /npf && python3 -m pip install -r /npf/requirements.txt
 CMD [""]
diff --git a/integration/integration.sh b/integration/integration.sh
index 3b13d55..9b32371 100755
--- a/integration/integration.sh
+++ b/integration/integration.sh
@@ -3,12 +3,11 @@
 
 ret=0
 
-#Function that launches a npf test on click-2022 and compare the expected output
-compare() {
-    test=$1
-    python=$2
+compare_raw() {
+    test=$2
+    python=$3
     echo "Executing npf test $test..."
-    $python npf.py click-2022 --force-test --no-graph-time --test integration/$test.npf --quiet-build ${@:3} &> res$test
+    $python $1 click-2022 --force-test --no-graph-time --test integration/$test.npf --quiet-build ${@:4} &> res$test
     if [ $? -ne 0 ] ; then
         echo "npf.py returned an error for test $test !"
         cat res$test
@@ -19,12 +18,17 @@ compare() {
         echo "$test passed !"
     else
         echo "Error for $test : expected output does not match !"
-        echo "Command : $python npf.py click-2022 --force-test --test integration/$test.npf --quiet-build ${@:3}"
+        echo "Command : $python $1 click-2022 --force-test --test integration/$test.npf --quiet-build ${@:4}"
         diff res$test integration/$test.stdout
         ret=1
     fi
 }
 
+#Function that launches a npf test on click-2022 and compare the expected output
+compare() {
+    compare_raw npf.py $@
+}
+
 #Function that launch watcher on a npf test with click-2022 and compare the expected output
 compare_watcher() {
     test=watcher
@@ -79,6 +83,12 @@ fi
 
 
 try integration/empty.npf $python
+compare_raw npf_compare.py single $python --csv out.csv
+diff out.csv integration/single.csv
+if [ $? -ne 0 ] ; then
+    echo "single.csv changed !"
+    ret=1
+fi
 compare experimental $python
 compare pyexit $python
 compare integration-01 $python
diff --git a/integration/single.csv b/integration/single.csv
new file mode 100644
index 0000000..7c50133
--- /dev/null
+++ b/integration/single.csv
@@ -0,0 +1,4 @@
+index,build,test_index,y_D,run_index
+0,Local,0,4.0,0
+1,Local,0,4.0,1
+2,Local,0,4.0,2
diff --git a/integration/single.npf b/integration/single.npf
new file mode 100644
index 0000000..2c476d6
--- /dev/null
+++ b/integration/single.npf
@@ -0,0 +1,6 @@
+%variables
+N=2
+X=3
+
+%script
+echo "RESULT-D 4"
diff --git a/integration/single.stdout b/integration/single.stdout
new file mode 100644
index 0000000..af7dcc1
--- /dev/null
+++ b/integration/single.stdout
@@ -0,0 +1,12 @@
+[Click 2022] Running test single.npf on version 9197a59...
+Executing init scripts...
+N = 2, X = 3 [run 1/3 for test 1/1]
+[0] RESULT-D 4
+N = 2, X = 3 [run 2/3 for test 1/1]
+[0] RESULT-D 4
+N = 2, X = 3 [run 3/3 for test 1/1]
+[0] RESULT-D 4
+[4.0, 4.0, 4.0]
+Generating graphs...
+Pandas dataframe written to out.csv
+Graph of test written to /npf/compare/single_click-2022-D.pdf