diff --git a/bin/install-kafka.sh b/bin/install-kafka.sh
index 3e8703d..73f5ce1 100755
--- a/bin/install-kafka.sh
+++ b/bin/install-kafka.sh
@@ -1,55 +1,56 @@
 #!/usr/bin/env bash
 
 set -xe
 
 SCALA_VERSION=2.12
 KAFKA_VERSION=2.1.1
+KAFKA_CHECKSUM=a2e8168e8de6b45e8fca1f2883f0744d3c5a939b70d8a47a5428b72188501d4c2fc11bc35759f2392680d4e8ecf2fa9d0e518e77fd28393afba22194ad018b10
+
 KAFKA_APP="kafka_${SCALA_VERSION}-${KAFKA_VERSION}"
 TARBALL="${KAFKA_APP}.tgz"
+URL="http://apache.mirrors.ovh.net/ftp.apache.org/dist/kafka/${KAFKA_VERSION}/${TARBALL}"
 CHECKSUMS="${TARBALL}.sha512"
 KAFKA_ROOT_DIR=swh/journal/tests
 KAFKA_DIR="${KAFKA_ROOT_DIR}/${KAFKA_APP}"
 KAFKA_LINK="${KAFKA_ROOT_DIR}/kafka"
-URL="http://apache.mirrors.ovh.net/ftp.apache.org/dist/kafka/${KAFKA_VERSION}/${TARBALL}"
-KAFKA_CHECKSUM=a2e8168e8de6b45e8fca1f2883f0744d3c5a939b70d8a47a5428b72188501d4c2fc11bc35759f2392680d4e8ecf2fa9d0e518e77fd28393afba22194ad018b10
 
 case $1 in
     "install")
         echo "Kafka installation started."
         if [ ! -f $TARBALL ]; then
             echo "Kafka download"
             wget $URL
             echo "${KAFKA_CHECKSUM}  ${TARBALL}" > $CHECKSUMS
             sha512sum -c $CHECKSUMS
 
             if [ $? -ne 0 ]; then
                 echo "Kafka download: failed to retrieve ${TARBALL}";
                 exit 1
             fi
             echo "Kafka download done"
         fi
 
         if [ ! -d $KAFKA_DIR ]; then
             echo "Kafka extraction"
             tar xvf $TARBALL -C $KAFKA_ROOT_DIR
             pushd $KAFKA_ROOT_DIR && ln -nsf $KAFKA_APP kafka && popd
             echo "Kafka extraction done"
         fi
         echo "Kafka installation done. Kafka is installed at $KAFKA_DIR"
         ;;
     "clean")
         echo "Kafka cleanup started."
         [ -d $KAFKA_DIR ] && rm -rf $KAFKA_DIR
         [ -L $KAFKA_LINK ] && rm $KAFKA_LINK
         echo "Kafka cleanup done."
         ;;
     "clean-cache")
         echo "Kafka cleanup cache started."
         [ -f $TARBALL ] && rm $TARBALL
         [ -f $CHECKSUMS ] && rm $CHECKSUMS
         echo "Kafka cleanup cache done."
         ;;
     *)
         echo "Unknown command, do nothing"
         exit 1;
 esac