diff --git a/lib/core.sh b/lib/core.sh
index 631931d..c6cc042 100644
--- a/lib/core.sh
+++ b/lib/core.sh
@@ -75,6 +75,10 @@ then
 else
     die "The variable JUJU_ENV is not properly set"
 fi
+
+CHROOT=${JUJU_HOME}/usr/bin/arch-chroot
+TRUE=${JUJU_HOME}/usr/bin/true
+
 ################################# MAIN FUNCTIONS ##############################
 
 function is_juju_installed(){
@@ -160,12 +164,12 @@ function run_juju_as_root(){
     [ "$JUJU_ENV" == "1" ] && die "Error: The operation is not allowed inside JuJu environment"
 
     mkdir -p ${JUJU_HOME}/${HOME}
-    ${JUJU_HOME}/usr/bin/arch-chroot $JUJU_HOME /usr/bin/bash -c "mkdir -p /run/lock && $(_define_chroot_args "$@")"
+    ${CHROOT} $JUJU_HOME /usr/bin/bash -c "mkdir -p /run/lock && $(_define_chroot_args "$@")"
 }
 
 
 function _run_juju_with_proot(){
-    if ${PROOT} ${JUJU_HOME}/usr/bin/true &> /dev/null
+    if ${PROOT} ${TRUE} &> /dev/null
     then
         JUJU_ENV=1 ${PROOT} $@
     else
diff --git a/tests/test_all.sh b/tests/test_all.sh
new file mode 100755
index 0000000..684e6fd
--- /dev/null
+++ b/tests/test_all.sh
@@ -0,0 +1,5 @@
+
+for tst in $(ls $(dirname $0)/test_* | grep -v $(basename $0))
+do
+    $tst
+done
diff --git a/tests/test_core.sh b/tests/test_core.sh
new file mode 100755
index 0000000..1a1dc77
--- /dev/null
+++ b/tests/test_core.sh
@@ -0,0 +1,154 @@
+#!/bin/bash
+# To test this module you need to run it inside a Archlinux system. Also, the following packages needs to be installed:
+# bash
+# pacman
+# arch-install-scripts
+# proot
+# coreutils
+# grep
+# sudo
+
+source "$(dirname $0)/utils.sh"
+CURRPWD=$PWD
+JUJU_HOME=""
+
+function set_up(){
+    cd $CURRPWD
+    JUJU_HOME=$(TMPDIR=/tmp mktemp -d -t jujuhome.XXXXXXXXXX)
+    source "$(dirname $0)/../lib/core.sh"
+    ORIGIN_WD=$(TMPDIR=/tmp mktemp -d -t jujuowd.XXXXXXXXXX)
+    cd $ORIGIN_WD
+    JUJU_TEMPDIR=$(TMPDIR=/tmp mktemp -d -t jujutemp.XXXXXXXXXX)
+}
+
+
+function tear_down(){
+    rm -rf $JUJU_HOME
+    rm -rf $ORIGIN_WD
+    rm -rf $JUJU_TEMPDIR
+}
+
+function test_is_juju_installed(){
+    is_juju_installed
+    is_equal $? 1 || return 1
+    touch $JUJU_HOME/just_file
+    is_juju_installed
+    is_equal $? 0 || return 1
+}
+
+
+function test_setup_juju(){
+    wget_mock(){
+        # Proof that the setup is happening
+        # inside $JUJU_TEMPDIR
+        local cwd=${PWD#${JUJU_TEMPDIR}}
+        local parent_dir=${PWD%${cwd}}
+        is_equal $JUJU_TEMPDIR ${parent_dir} || return 1
+        touch file
+        tar -czvf juju-${ARCH}.tar.gz file
+    }
+    WGET=wget_mock
+    setup_juju 1> /dev/null
+    [ -e $JUJU_HOME/file ] || return 1
+    [ -e $JUJU_HOME/run/lock ] || return 1
+
+    export -f setup_juju
+    JUJU_ENV=1 bash -ic "setup_juju" &> /dev/null
+    is_equal $? 1 || return 1
+}
+
+
+function test_setup_from_file_juju(){
+    touch file
+    tar -czvf juju-${ARCH}.tar.gz file 1> /dev/null
+    setup_from_file_juju juju-${ARCH}.tar.gz 1> /dev/null
+    [ -e $JUJU_HOME/file ] || return 1
+    [ -e $JUJU_HOME/run/lock ] || return 1
+
+    export -f setup_from_file_juju
+    bash -ic "setup_from_file_juju noexist.tar.gz" &> /dev/null
+    is_equal $? 1 || return 1
+
+    export -f setup_from_file_juju
+    JUJU_ENV=1 bash -ic "setup_from_file_juju" &> /dev/null
+    is_equal $? 1 || return 1
+}
+
+
+function test_run_juju_as_root(){
+    install_mini_juju
+    CHROOT="sudo $CHROOT"
+    SH="type -t type"
+    local output=$(run_juju_as_root)
+    is_equal $output "builtin" || return 1
+    local output=$(run_juju_as_root pwd)
+    is_equal $output "/" || return 1
+    run_juju_as_root "[ -e /run/lock ]"
+    is_equal $? 0 || return 1
+    [ -e $JUJU_HOME/${HOME} ] || return 1
+
+    export -f run_juju_as_root
+    JUJU_ENV=1 bash -ic "run_juju_as_root" &> /dev/null
+    is_equal $? 1 || return 1
+}
+
+function test_run_juju_as_user(){
+    install_mini_juju
+    local output=$(run_juju_as_user "" "mkdir -v /newdir2")
+    is_equal "$output" "/usr/bin/mkdir: created directory '/newdir2'" || return 1
+    [ -e $JUJU_HOME/newdir2 ]
+    is_equal $? 0 || return 1
+
+    SH="mkdir -v /newdir"
+    local output=$(run_juju_as_user "")
+    is_equal "$output" "/usr/bin/mkdir: created directory '/newdir'" || return 1
+    [ -e $JUJU_HOME/newdir ]
+    is_equal $? 0 || return 1
+}
+
+function test_run_juju_as_user_proot_args(){
+    install_mini_juju
+    run_juju_as_user "--help" "" 1> /dev/null
+    is_equal $? 0 || return 1
+    run_juju_as_user "--helps" "" &> /dev/null
+    is_equal $? 1 || return 1
+
+    mkdir $JUJU_TEMPDIR/newdir
+    touch $JUJU_TEMPDIR/newdir/newfile
+    run_juju_as_user "-b $JUJU_TEMPDIR/newdir:/newdir" "ls -l /newdir/newfile" 1> /dev/null
+    is_equal $? 0 || return 1
+}
+
+#function test_run_juju_as_user_seccomp(){
+    #install_mini_juju
+    #TRUE="/usr/bin/false"
+    #run_juju_as_user "" "env" "|" "grep" "PROOT_NO_SECCOMP"
+#}
+
+#function test_run_juju_as_fakeroot(){
+    #install_mini_juju
+    #local output=$(run_juju_as_fakeroot "" "bash")
+    #is_equal "$output" "root" || return 1
+#}
+
+function test_delete_juju(){
+    install_mini_juju
+    echo "N" | delete_juju 1> /dev/null
+    is_juju_installed
+    is_equal $? 0 || return 1
+    echo "Y" | delete_juju 1> /dev/null
+    is_juju_installed
+    is_equal $? 1 || return 1
+
+    export -f delete_juju
+    JUJU_ENV=1 bash -ic "delete_juju" &> /dev/null
+    is_equal $? 1 || return 1
+}
+
+
+for func in $(declare -F | grep test_ | awk '{print $3}' | xargs)
+do
+    set_up
+    $func && echo -e "${func}...\033[1;32mOK\033[0m" || echo -e "${func}...\033[1;31mFAIL\033[0m"
+    tear_down
+done
diff --git a/tests/util.sh b/tests/test_util.sh
old mode 100644
new mode 100755
similarity index 93%
rename from tests/util.sh
rename to tests/test_util.sh
index 0e39ad1..757f08f
--- a/tests/util.sh
+++ b/tests/test_util.sh
@@ -1,9 +1,7 @@
+#!/bin/bash
+source "$(dirname $0)/utils.sh"
 source "$(dirname $0)/../lib/util.sh"
 
-function is_equal(){
-    [ "$1" == "$2" ] || return 1 && return 0
-}
-
 function test_echoerr(){
     local actual=$(echoerr "Test" 2>&1)
     is_equal "$actual" "Test" || return 1
@@ -35,6 +33,8 @@ function test_die(){
     local actual=$(die "Test" 2>&1)
     local expected=$(echo -e "\033[1;31mTest\033[0m")
     is_equal "$actual" "$expected" || return 1
+    bash -ic "die Dying" &> /dev/null
+    is_equal $? 1 || return 1
     return 0
 }
 
diff --git a/tests/utils.sh b/tests/utils.sh
new file mode 100644
index 0000000..bd12d4e
--- /dev/null
+++ b/tests/utils.sh
@@ -0,0 +1,51 @@
+function install_executable(){
+    for i in $( ldd $* | grep -v dynamic | cut -d " " -f 3 | sed 's/://' | sort | uniq )
+      do
+        cp --parents $i $JUJU_HOME
+      done
+    # ARCH amd64
+    if [ -f /lib64/ld-linux-x86-64.so.2 ]; then
+       cp --parents /lib64/ld-linux-x86-64.so.2 $JUJU_HOME
+    fi
+    # ARCH i386
+    if [ -f  /lib/ld-linux.so.2 ]; then
+       cp --parents /lib/ld-linux.so.2 $JUJU_HOME
+    fi
+    cp --parent $* $JUJU_HOME/
+}
+
+function install_package(){
+    pacman -Ql $1 | grep "/$" | sed 's/.* //' | xargs -I {} mkdir -p $JUJU_HOME/{}
+    pacman -Ql $1 | grep -v "/$" | sed 's/.* //' | xargs -I {} cp -f -a --parents {} $JUJU_HOME
+    #export -f install_executable
+    #export JUJU_HOME
+    #pacman -Ql $1 | sed 's/.* //' | grep "^/usr/bin/" | xargs -I {} bash -ic "install_executable {}"
+}
+
+function install_mini_juju(){
+    mkdir -p ${JUJU_HOME}/{proc,bin,sys,dev,run,tmp,etc}
+    touch ${JUJU_HOME}/etc/resolv.conf
+    mkdir -p ${JUJU_HOME}/usr/bin
+    #echo "root:x:0:0:root:/root:/bin/bash" > ${JUJU_HOME}/etc/passwd
+    #cp /etc/nsswitch.conf ${JUJU_HOME}
+    cp /usr/bin/arch-chroot ${JUJU_HOME}/usr/bin
+    install_executable /usr/bin/bash
+    install_executable /usr/bin/ls
+    install_executable /usr/bin/whoami
+    install_executable /usr/bin/grep
+    install_executable /usr/bin/mkdir
+    install_executable /usr/bin/proot
+    install_package bash
+    install_package talloc
+    install_package proot
+    install_package coreutils
+    install_package grep
+    ln -s /usr/bin/bash $JUJU_HOME/bin/sh
+}
+
+
+function is_equal(){
+    [ "$1" == "$2" ] || return 1 && return 0
+}
+
+