diff --git a/docker/tests/Dockerfile b/docker/tests/Dockerfile
index 115f8fb..4874ef1 100644
--- a/docker/tests/Dockerfile
+++ b/docker/tests/Dockerfile
@@ -54,6 +54,7 @@
 RUN mv /usr/share/osm-tests/conformance-tests/ /robot-systest/
 RUN mv /usr/share/osm-tests/charm.sh /usr/sbin/charm
 
+ARG CACHE_DATE=not_a_date
 RUN git clone \
     https://osm.etsi.org/gitlab/vnf-onboarding/osm-packages.git \
     --recurse-submodules \
diff --git a/jenkins/ci-pipelines/ci_stage_3.groovy b/jenkins/ci-pipelines/ci_stage_3.groovy
index 39fd793..cd7cc8e 100644
--- a/jenkins/ci-pipelines/ci_stage_3.groovy
+++ b/jenkins/ci-pipelines/ci_stage_3.groovy
@@ -322,7 +322,8 @@
                                 usernameVariable: 'USERNAME', passwordVariable: 'PASSWORD']]) {
                     sh "docker login ${INTERNAL_DOCKER_REGISTRY} -u ${USERNAME} -p ${PASSWORD}"
                 }
-                moduleBuildArgs = ""
+                datetime = sh(returnStdout: true, script: "date +%Y-%m-%d:%H:%M:%S").trim()
+                moduleBuildArgs = " --build-arg CACHE_DATE=${datetime}"
                 for (packageName in builtModules.keySet()) {
                     envName=packageName.replaceAll("-","_").toUpperCase()+"_URL"
                     moduleBuildArgs += " --build-arg ${envName}=" + builtModules[packageName]