diff --git a/lib/core.sh b/lib/core.sh
index c1280f6..8d5acf0 100644
--- a/lib/core.sh
+++ b/lib/core.sh
@@ -83,10 +83,8 @@ PROOT_LINK=http://static.proot.me/proot-${ARCH}
 
 SH="/bin/sh --login"
 CHROOT=${JUJU_HOME}/usr/bin/arch-chroot
-TRUE=${JUJU_HOME}/usr/bin/true
 ID="${JUJU_HOME}/usr/bin/id -u"
 
-
 ################################# MAIN FUNCTIONS ##############################
 
 function is_juju_installed(){
@@ -174,33 +172,27 @@ function run_juju_as_root(){
     JUJU_ENV=1 ${CHROOT} $JUJU_HOME /usr/bin/bash -c "mkdir -p /run/lock && $(_define_chroot_args "$@")"
 }
 
+function _run_proot(){
+    if ! JUJU_ENV=1 ${@}
+    then
+        info "Trying execute proot with PROOT_NO_SECCOMP=1 "
+        JUJU_ENV=1 PROOT_NO_SECCOMP=1 ${@}
+    fi
+}
+
 
 function _run_juju_with_proot(){
-    local proot_bin=${PROOT}
-    if ! ${proot_bin} ${TRUE} &> /dev/null
-    then
-        if PROOT_NO_SECCOMP=1 ${proot_bin} ${TRUE} &> /dev/null
-        then
-            export PROOT_NO_SECCOMP=1
-        else
-            proot_bin=${PROOT_COMPAT}
-            if PROOT_NO_SECCOMP=1 ${proot_bin} ${TRUE} &> /dev/null
-            then
-                export PROOT_NO_SECCOMP=1
-            else
-                die "Proot cannot be executed."
-            fi
-        fi
-    fi
-
-    [ "$(${proot_bin} ${ID} 2> /dev/null )" == "0" ] && \
+    [ "$(${ID} 2> /dev/null )" == "0" ] && \
         die "You cannot access with root privileges. Use --root option instead."
 
-    JUJU_ENV=1 ${proot_bin} $@
-    local ret=$?
-    export -n PROOT_NO_SECCOMP
-
-    return $ret
+    if ! _run_proot ${PROOT} ${@}
+    then
+        info "Trying to execute proot compat binary"
+        if ! _run_proot ${PROOT_COMPAT} ${@}
+        then
+            die "Proot cannot be executed: Try to use juju -p \"-k 3.10\""
+        fi
+    fi
 }
 
 
diff --git a/tests/test_core.sh b/tests/test_core.sh
index afae1a6..d433933 100755
--- a/tests/test_core.sh
+++ b/tests/test_core.sh
@@ -108,8 +108,6 @@ 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
@@ -117,24 +115,57 @@ function test_run_juju_as_user_proot_args(){
     is_equal $? 0 || return 1
 
     export -f _run_juju_with_proot
+    export -f _run_proot
+    export -f info
     export PROOT
-    export TRUE
+    export PROOT_COMPAT
+    ID="/usr/bin/echo 1" bash -ic "_run_juju_with_proot --helps" &> /dev/null
+    is_equal $? 1 || return 1
+    export -n _run_juju_with_proot
+    export -n _run_proot
+    export -n info
+    export -n PROOT
+    export -n PROOT_COMPAT
+}
+
+function test_run_juju_with_proot_with_compat(){
+    install_mini_juju
+    PROOT="/usr/bin/true"
+    PROOT_COMPAT="/usr/bin/false"
+    _run_juju_with_proot "" "" 1> /dev/null
+    is_equal $? 0 || return 1
+
+    PROOT="/usr/bin/false"
+    PROOT_COMPAT="/usr/bin/true"
+    _run_juju_with_proot "" "" 1> /dev/null
+    is_equal $? 0 || return 1
+
+    export -f _run_juju_with_proot
+    export -f _run_proot
+    export -f info
+    PROOT="/usr/bin/false" PROOT_COMPAT="/usr/bin/false" ID="/usr/bin/echo 1" bash -ic "_run_juju_with_proot --helps" &> /dev/null
+    is_equal $? 1 || return 1
+    export -n _run_juju_with_proot
+    export -n _run_proot
+    export -n info
+}
+
+function test_run_juju_with_proot_as_root(){
+    export -f _run_juju_with_proot
     ID="/usr/bin/echo 0" bash -ic "_run_juju_with_proot" &> /dev/null
     is_equal $? 1 || return 1
     export -n _run_juju_with_proot
     unset _run_juju_with_proot
-    export -n PROOT
-    export -n TRUE
 }
 
-function test_run_juju_as_user_seccomp(){
-    install_mini_juju
-    PROOT=""
-    local output=$(_run_juju_with_proot "" "env" | grep "PROOT_NO_SECCOMP")
+function test_run_proot_seccomp(){
+    local output=$(_run_proot "env" | grep "^PROOT_NO_SECCOMP")
     is_equal $output "" || return 1
 
-    TRUE="/usr/bin/false"
-    local output=$(_run_juju_with_proot "" "env" | grep "PROOT_NO_SECCOMP")
+    envv(){
+        env | grep "^PROOT_NO_SECCOMP"
+    }
+    local output=$(_run_proot "envv" | grep "^PROOT_NO_SECCOMP")
     is_equal $output "PROOT_NO_SECCOMP=1" || return 1
 }
 
@@ -160,7 +191,6 @@ function test_nested_juju(){
     is_equal $? 1 || return 1
 }
 
-
 for func in $(declare -F | grep test_ | awk '{print $3}' | xargs)
 do
     set_up