diff --git a/sub_scripts/testing_process.sh b/sub_scripts/testing_process.sh
index 65a416f..079baf0 100644
--- a/sub_scripts/testing_process.sh
+++ b/sub_scripts/testing_process.sh
@@ -21,6 +21,19 @@ break_before_continue () {
 	fi
 }
 
+#=================================================
+
+PRINT_YUNOHOST_VERSION () {
+	ECHO_FORMAT ">> YunoHost versions:\n" "white" "bold" clog
+	# Be sure that the container is running
+	LXC_START "true"
+	# Print the version of YunoHost from the LXC container
+	ssh $arg_ssh $lxc_name "sudo yunohost --version"
+
+	# Get the version of YunoHost from the LXC container
+	ynh_version=$(ssh -q $lxc_name "sudo yunohost --version --output-as plain | grep -A4 moulinette | tail -n1 | sed 's@\.@@g'")
+}
+
 #=================================================
 # Install and remove an app
 #=================================================
@@ -53,8 +66,17 @@ SETUP_APP () {
 		ECHO_FORMAT "$(cat "$temp_log")\n" clog
 	fi
 
+	# Force installation of 3rd party apps without asking for confirmation.
+	# Only with the version 3.4.1 or later.
+	if [ $ynh_version -ge 341 ]
+	then
+		local force_3rd="--force"
+	else
+		local force_3rd=""
+	fi
+
 	# Install the application in a LXC container
-	LXC_START "sudo PACKAGE_CHECK_EXEC=1 yunohost --debug app install \"$package_dir\" -a \"$manifest_args_mod\""
+	LXC_START "sudo PACKAGE_CHECK_EXEC=1 yunohost --debug app install $force_3rd \"$package_dir\" -a \"$manifest_args_mod\""
 
 	# yunohost_result gets the return code of the installation
 	yunohost_result=$?
@@ -1547,7 +1569,9 @@ check_witness_files () {
 TESTING_PROCESS () {
 	# Launch all tests successively
 
-	ECHO_FORMAT "\nTests serie: ${tests_serie#;; }\n" "white" "underlined" clog
+	ECHO_FORMAT "\nTests serie: ${tests_serie#;; }\n\n" "white" "underlined" clog
+
+	PRINT_YUNOHOST_VERSION
 
 	# Init the value for the current test
 	cur_test=1