diff --git a/docker/mk/Makefile.include b/docker/mk/Makefile.include
index 4105295..f31d2ca 100644
--- a/docker/mk/Makefile.include
+++ b/docker/mk/Makefile.include
@@ -76,6 +76,7 @@
                    --build-arg LWUI_VERSION==$(shell cat $(MKBUILD)/.dep_lightui) \
                    --build-arg NGUI_VERSION==$(shell cat $(MKBUILD)/.dep_ngui) \
                    --build-arg TESTS_VERSION==$(shell cat $(MKBUILD)/.dep_tests) \
+                   --build-arg CACHE_DATE==$(shell date -uI) \
                    $(DOCKER_ARGS) .
 
 clean:
diff --git a/docker/tests/Dockerfile b/docker/tests/Dockerfile
index 023bd84..18ebe8e 100644
--- a/docker/tests/Dockerfile
+++ b/docker/tests/Dockerfile
@@ -56,6 +56,7 @@
 
 WORKDIR /robot-systest
 
+ARG CACHE_DATE=2021-03-01
 RUN git clone https://osm.etsi.org/gitlab/vnf-onboarding/osm-packages.git --recurse-submodules /robot-systest/osm-packages
 
 # Folder where Robot tests are stored