diff --git a/.woodpecker.yml b/.woodpecker.yml
index 8cf2c15..b1d9f41 100644
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@@ -5,16 +5,9 @@ clone:
 
 pipeline:
   test:
-    image: brenard/debian-python-deb
+    image: brenard/mylib:dev-master
     commands:
-      - DEBIAN_FRONTEND=noninteractive apt-get -qq update < /dev/null > /dev/null
-      - DEBIAN_FRONTEND=noninteractive apt-get -y -qq upgrade < /dev/null > /dev/null
-      - DEBIAN_FRONTEND=noninteractive apt-get -qq -y install --no-install-recommends pkg-config libsystemd-dev libldap2-dev libsasl2-dev libpq-dev libmariadb-dev wget unzip < /dev/null > /dev/null
-      - wget --no-verbose -O /opt/instantclient-basic-linux.x64-21.4.0.0.0dbru.zip https://download.oracle.com/otn_software/linux/instantclient/214000/instantclient-basic-linux.x64-21.4.0.0.0dbru.zip
-      - unzip -qq -d /opt /opt/instantclient-basic-linux.x64-21.4.0.0.0dbru.zip
-      - echo /opt/instantclient_* > /etc/ld.so.conf.d/oracle-instantclient.conf
-      - ldconfig
-      - ./tests.sh --quiet
+      - ./tests.sh --no-venv
 
   build:
     image: brenard/debian-python-deb
diff --git a/docker/dev-master/Dockerfile b/docker/dev-master/Dockerfile
index 7ed2f33..bfc2328 100644
--- a/docker/dev-master/Dockerfile
+++ b/docker/dev-master/Dockerfile
@@ -1,3 +1,5 @@
 FROM brenard/mylib:latest
 RUN apt-get remove -y python3-mylib
 RUN python3 -m pip install -U git+https://gitea.zionetrix.net/bn8/python-mylib.git
+RUN git clone https://gitea.zionetrix.net/bn8/python-mylib.git /usr/local/src/python-mylib && pip install /usr/local/src/python-mylib[dev]
+RUN cd /usr/local/src/python-mylib && pre-commit run --all-files
diff --git a/docker/latest/Dockerfile b/docker/latest/Dockerfile
index 2d655ee..605fcdb 100644
--- a/docker/latest/Dockerfile
+++ b/docker/latest/Dockerfile
@@ -1,4 +1,5 @@
 FROM debian:latest
 RUN echo "deb http://debian.zionetrix.net stable main" > /etc/apt/sources.list.d/zionetrix.list && apt-get -o Acquire::AllowInsecureRepositories=true -o Acquire::AllowDowngradeToInsecureRepositories=true update && apt-get -o APT::Get::AllowUnauthenticated=true install --yes zionetrix-archive-keyring && apt-get clean && rm -fr rm -rf /var/lib/apt/lists/*
-RUN apt-get update && apt-get upgrade -y && apt-get install -y python3-all python3-dev python3-pip python3-venv python3-mylib build-essential git && apt-get clean && rm -fr rm -rf /var/lib/apt/lists/*
-RUN python3 -m pip install pylint pytest flake8 flake8-junit-report pylint-junit junitparser
+RUN apt-get update && apt-get upgrade -y && apt-get install -y python3-all python3-dev python3-pip python3-venv python3-mylib build-essential git libldap2-dev libsasl2-dev pkg-config libsystemd-dev libpq-dev libmariadb-dev wget unzip && apt-get clean && rm -fr rm -rf /var/lib/apt/lists/*
+RUN python3 -m pip install pylint pytest flake8 flake8-junit-report pylint-junit junitparser pre-commit
+RUN wget --no-verbose -O /opt/instantclient-basic-linux.x64-21.4.0.0.0dbru.zip https://download.oracle.com/otn_software/linux/instantclient/214000/instantclient-basic-linux.x64-21.4.0.0.0dbru.zip && unzip -qq -d /opt /opt/instantclient-basic-linux.x64-21.4.0.0.0dbru.zip && echo /opt/instantclient_* > /etc/ld.so.conf.d/oracle-instantclient.conf && ldconfig
diff --git a/tests.sh b/tests.sh
index 0deaf4b..d4c86d2 100755
--- a/tests.sh
+++ b/tests.sh
@@ -1,31 +1,72 @@
 #!/bin/bash
 
 QUIET_ARG=""
+NO_VENV=0
+
+function usage() {
+    [ -n "$1" ] && echo -e "$1\n" > /dev/stderr
+    echo "Usage: $0 [-x] [-q|--quiet] [--no-venv]"
+    echo "  -h/--help     Show usage message"
+    echo "  -q/--quiet    Enable quiet mode"
+    echo "  -n/--no-venv  Disable venv creation and run tests on system environment"
+    echo "  -x            Enable debug mode"
+    [ -n "$1" ] && exit 1
+    exit 0
+}
+
+idx=1
+while [ $idx -le $# ]
+do
+    OPT=${!idx}
+    case $OPT in
+        -h|--help)
+            usage
+            ;;
+        -q|--quiet)
+            QUIET_ARG="--quiet"
+            ;;
+        -n|--no-venv)
+            NO_VENV=1
+            ;;
+        -x)
+            set -x
+            ;;
+        *)
+            usage "Unkown parameter '$OPT'"
+    esac
+    let idx=idx+1
+done
 [ "$1" == "--quiet" ] && QUIET_ARG="--quiet"
 
 # Enter source directory
 cd $( dirname $0 )
 
-if [ -d venv ]
+TEMP_VENV=0
+VENV=""
+if [ $NO_VENV -eq 1 ]
 then
-	VENV=$( realpath venv )
-	TEMP_VENV=0
+    echo "Run tests in system environment..."
+elif [ -d venv ]
+then
+    VENV=$( realpath venv )
+    echo "Using existing virtualenv ($VENV)..."
 else
-	# Create a temporary venv
-	VENV=$(mktemp -d)
-	echo "Create a temporary virtualenv in $VENV to install dependencies..."
-	TEMP_VENV=1
-	python3 -m venv $VENV
+    # Create a temporary venv
+    VENV=$(mktemp -d)
+    echo "Create a temporary virtualenv in $VENV..."
+    TEMP_VENV=1
+    python3 -m venv $VENV
 fi
 
-echo "Install package with dev dependencies using pip..."
-$VENV/bin/python3 -m pip install -e ".[dev]" $QUIET_ARG
-
-RES=0
+if [ -n "$VENV" ]
+then
+    echo "Install package with dev dependencies using pip in virtualenv..."
+    $VENV/bin/python3 -m pip install -e ".[dev]" $QUIET_ARG
+    source $VENV/bin/activate
+fi
 
 # Run pre-commit
 echo "Run pre-commit..."
-source $VENV/bin/activate
 pre-commit run --all-files
 [ $? -ne 0 ] && RES=1