diff --git a/src/forecaster/.gitlab-ci.yml b/src/forecaster/.gitlab-ci.yml
index 31a3648f87dc877d9346ca651c7e68bf8b281888..09b2f8f4e67db6ce152da608baff6f51279a1dc8 100644
--- a/src/forecaster/.gitlab-ci.yml
+++ b/src/forecaster/.gitlab-ci.yml
@@ -50,6 +50,7 @@ unit_test forecaster:
     - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
     - if docker network list | grep teraflowbridge; then echo "teraflowbridge is already created"; else docker network create -d bridge teraflowbridge; fi
     - if docker container ls | grep $IMAGE_NAME; then docker rm -f $IMAGE_NAME; else echo "$IMAGE_NAME image is not in the system"; fi
+    - docker container prune -f
   script:
     - docker pull "$CI_REGISTRY_IMAGE/$IMAGE_NAME:$IMAGE_TAG"
     - docker run --name $IMAGE_NAME -d -p 10040:10040 -v "$PWD/src/$IMAGE_NAME/tests:/opt/results" --network=teraflowbridge $CI_REGISTRY_IMAGE/$IMAGE_NAME:$IMAGE_TAG