diff --git a/sub_scripts/launcher.sh b/sub_scripts/launcher.sh
index a96a8f5..c5b3e3f 100755
--- a/sub_scripts/launcher.sh
+++ b/sub_scripts/launcher.sh
@@ -295,6 +295,18 @@ $(cat "$script_dir/sub_scripts/Build_lxc.log")"
 	# Count the number of lines of the current yunohost log file.
 	COPY_LOG 1
 
+    # Wait for apt to be available before the test.
+    for try in `seq 1 17`
+    do
+            # Check if /var/lib/dpkg/lock is used by another process
+            if sudo lxc-attach -n $lxc_name -- lsof /var/lib/dpkg/lock > /dev/null
+            then
+                echo "apt is already in use..."
+                # Sleep an exponential time at each round
+                sleep $(( try * try ))
+            fi
+    done
+
 	# Copy the package into the container.
 	rsync -rq --delete "$package_path" "$lxc_name": >> "$test_result" 2>&1