diff --git a/tests/Dockerfile b/tests/Dockerfile
index b5f55c3..945a23b 100644
--- a/tests/Dockerfile
+++ b/tests/Dockerfile
@@ -3,12 +3,9 @@ FROM ubuntu:jammy
 
 ## Base tools installations
 RUN apt-get update && \
-	apt-get install -y software-properties-common apt-utils wget tree sudo && \
-	# ca-certificates is required for wget downloads, apt utils for ppa additions. Optimisations here don't end well
-	## Google direct
-	wget -q https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb && \
-	apt-get install -y --no-install-recommends ./google-chrome-stable_current_amd64.deb libxss1 netcat  && \
-	rm google-chrome-stable_current_amd64.deb && \
+	apt-get install -y software-properties-common apt-utils wget tree sudo netcat && \
+	# Install Chromium from apt instead of Chrome .deb
+	apt-get install -y chromium-browser && \
 	## Node ppa
 	wget -qO- https://deb.nodesource.com/setup_18.x | bash - && \
 	apt-get update && \
diff --git a/tests/hardhat.config.js b/tests/hardhat.config.js
index 639007f..4755dc9 100755
--- a/tests/hardhat.config.js
+++ b/tests/hardhat.config.js
@@ -48,7 +48,7 @@ module.exports = {
     artifacts: "./artifacts"
   },
   mocha: {
-    timeout: 10000,
+    timeout: 60000,
     parallel: true
   }
 }
\ No newline at end of file
diff --git a/tests/run.sh b/tests/run.sh
index e23eecb..616b5af 100755
--- a/tests/run.sh
+++ b/tests/run.sh
@@ -15,12 +15,12 @@ totalRuntime=0
 
 synthesis() {
 	if [ $? -eq 0 ]; then
-		currentRuntime=$(($(date +%s%N) - $date))
+		currentRuntime=$(($(date +%s) - $startdate))
 		totalRuntime=$(($totalRuntime + $currentRuntime))
-		if [ $currentRuntime -gt 10000000000 ]; then
-			Results="$Results$1 ⏰ $(($currentRuntime / 1000000000)), "
+		if [ $currentRuntime -gt 10 ]; then
+			Results="$Results$1 ⏰ $(($currentRuntime ))s, "
 		else
-			Results="$Results$1 ✅ $(($currentRuntime / 1000000000)), "
+			Results="$Results$1 ✅ $(($currentRuntime ))s, "
 		fi
 	else
 		Results=$Results$1" ❌, "
@@ -31,7 +31,7 @@ synthesis() {
 }
 
 #@ Should replicate the production environement
-BaseOptions="--read-only --network none --memory 500M --cpus 2.0 --user 1000:1000 --env USERNAME=🧑‍🎓 --env HOME=/jail --env TMPDIR=/jail --workdir /jail --tmpfs /jail:size=100M,noatime,exec,nodev,nosuid,uid=1000,gid=1000,nr_inodes=5k,mode=1700 --volume $TEMP_STUDENT:/jail/student:ro"
+BaseOptions="--platform linux/amd64 --read-only --network none --memory 500M --cpus 2.0 --user 1000:1000 --env USERNAME=🧑‍🎓 --env HOME=/jail --env TMPDIR=/jail --workdir /jail --tmpfs /jail:size=100M,noatime,exec,nodev,nosuid,uid=1000,gid=1000,nr_inodes=5k,mode=1700 --volume $TEMP_STUDENT:/jail/student:ro"
 
 if [ ! -z "$1" ]; then
 	if [ "$1" = "clean" ]; then
@@ -62,14 +62,14 @@ if [ ! -z "$1" ]; then
 		exit 0
 	fi
 	# A specific test has been named, we run it with the debug flag
-	docker build . -t blockchain --progress=plain
+	    docker build . -t blockchain --progress=plain --platform linux/amd64
 	mkdir -p $TEMP_STUDENT
 	cp $STORAGE_STUDENT/$1.{sol,js,html,mjs} $TEMP_STUDENT 2>/dev/null
 	time docker run $BaseOptions -e DEBUG=true -e EXERCISE="$1" blockchain:latest
 else
 	# No specific test has been named. Run all tests with a summary at the end
 	echo "▶️ Docker build"
-	docker build . -t blockchain
+	 docker build . -t blockchain --platform linux/amd64
 	echo "▶️ Running test"
 	# -e DEBUG=true available
 	mkdir -p $TEMP_STUDENT
@@ -78,13 +78,13 @@ else
 		rm $TEMP_STUDENT/* # for debugging, the folder is left and removed at the next run
 		cp $STORAGE_STUDENT/$testname.{sol,js,html,mjs} $TEMP_STUDENT 2>/dev/null
 		sleep 0.1
-		date=$(date +%s%N)
+		startdate=$(date +%s) 
 		docker run $BaseOptions -e EXERCISE=$testname blockchain:latest
 		synthesis $testname
 	done
 	sleep 1
 	echo "▶️ Results"
 	echo $Results
-	echo "tests ran:$testNumber in avg $(($totalRuntime / 1000000 / $testNumber)) ms"
+	echo "tests ran:$testNumber in avg $(($totalRuntime  / $testNumber)) seconds"
 fi
 exit 0