diff --git a/.travis.yml b/.travis.yml
index 4220fd3..a2dc0d2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,24 +15,21 @@ cache:
   directories:
     - $HOME/.cache/pre-commit
 
-install:
-  - pip3 install -r requirements.txt
-
 jobs:
   include:
     - name: lint with pre-commit
-      install: skip
       script:
         - pip3 install pre-commit
         - pre-commit run -c .travis-pre-commit-config.yaml -a
 
 script:
   - |
-    if ! git diff --name-only $TRAVIS_COMMIT_RANGE | grep -qvE '(.md)|^(LICENSE)|^(docs)'
+    if ! git diff --name-only $TRAVIS_COMMIT_RANGE | grep -qvE '(.md)|(.pdf)'
     then
       echo "Only doc files were updated, not running the CI."
       exit
     fi
+  - pip3 install -r requirements.txt
   - export ANSIBLE_STRATEGY=mitogen_linear
   - export ANSIBLE_STRATEGY_PLUGINS=${VIRTUAL_ENV}/lib/python${TRAVIS_PYTHON_VERSION}/site-packages/ansible_mitogen/plugins/strategy
   - molecule --version
diff --git a/Makefile b/Makefile
index 6b51add..e3b4d99 100644
--- a/Makefile
+++ b/Makefile
@@ -1,8 +1,8 @@
 venv:
 	pip3 install -r requirements.txt
 
-venv_upgrade:
-	for i in $$(cat requirements.txt|cut -d "=" -f1); do pip3 install $$i -U; done
+venv-upgrade:
+	pip3 install -U -r requirements.txt
 
 test:
 	molecule test
diff --git a/files/mariadb_dump_db.sh b/files/mariadb_dump_db.sh
index feb99ec..1de2d5a 100755
--- a/files/mariadb_dump_db.sh
+++ b/files/mariadb_dump_db.sh
@@ -9,6 +9,10 @@ err() {
   echo >&2 "[$(date +'%Y-%m-%dT%H:%M:%S%z')] ERROR: $*"
 }
 
+echo_date() {
+  echo -e "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: $*"
+}
+
 usage() {
   cat >&2 <<-EOF
 Usage : $0 -d <directory> -l <db_name>
@@ -72,7 +76,7 @@ for cmd in mysqldump gzip; do
 done
 
 for db in ${VAR_DB_LIST_ARGS//,/ }; do
-  echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: start $db dump."
+  echo_date "start $db dump."
   typeset DUMP_FILE=$VAR_DUMPS_DST_DIR/$db.$(date +%F_%H%M%S).sql
   mysqldump --single-transaction --quick --routines "$db" >"$DUMP_FILE"
   # shellcheck disable=SC2181
@@ -80,16 +84,16 @@ for db in ${VAR_DB_LIST_ARGS//,/ }; do
     err "unable do dump $db"
     exit 1
   fi
-  echo -e "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: done.\n"
+  echo_date "done.\n"
 done
 
 for sql in "$VAR_DUMPS_DST_DIR/"*.sql; do
-  echo "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: compress $sql."
+  echo_date "compress $sql."
   gzip -- "$sql" || {
     err "gzip $sql"
     exit 1
   }
-  echo -e "[$(date +'%Y-%m-%dT%H:%M:%S%z')]: done.\n"
+  echo_date "done.\n"
 done
 
 if [[ -n $VAR_ROTATION_DAYS_ARGS ]]; then