diff --git a/Makefile b/Makefile
index 8be89b1..0cc7de9 100644
--- a/Makefile
+++ b/Makefile
@@ -5,3 +5,5 @@ shellcheck-%:
 
 shellspec-%:
 	shellspec $*
+
+~/.zen/secret.june:
diff --git a/include.sh b/include.sh
new file mode 100644
index 0000000..1811918
--- /dev/null
+++ b/include.sh
@@ -0,0 +1,13 @@
+#!/bin/sh
+
+i_am() {
+  echo 'v0.4'
+}
+
+i_am_root() {
+  [ $(id -u) -eq 0 ]
+}
+
+i_should_install() {
+  [[ ! -f ~/.zen/secret.june ]]
+}
diff --git a/install.sh b/install.sh
index 5eeea4b..ea54064 100755
--- a/install.sh
+++ b/install.sh
@@ -1,13 +1,15 @@
 #!/bin/bash
+set -x
+. ./include.sh
 ########################################################################
-# Version: 0.3
+# Version: 0.4
 # License: AGPL-3.0 (https://choosealicense.com/licenses/agpl-3.0/)
 ########################################################################
 {
-[ $(id -u) -eq 0 ] && echo "LANCEMENT root INTERDIT. Utilisez un simple utilisateur du groupe \"sudo\" SVP" && exit 1
+i_am_root && echo "LANCEMENT root INTERDIT. Utilisez un simple utilisateur du groupe \"sudo\" SVP" && exit 1
 
 # MAIN #
-if [[ ! -f ~/.zen/secret.june ]];
+if i_should_install;
 then
 
 # Check requirements
diff --git a/specs/astrXbian_spec.sh b/specs/astrXbian_spec.sh
index 6e57e6f..f9d3201 100644
--- a/specs/astrXbian_spec.sh
+++ b/specs/astrXbian_spec.sh
@@ -1,15 +1,19 @@
 #shellcheck shell=sh
 
-Describe "AstrXbian"
-  Describe "install()"
-    install() {
-      echo #
-    }
-
-    It "installs world, but not implemented"
-      Pending "You should implement install function"
-      When call install world
-      The output should eq "amen"
+Describe 'AstrXbian'
+  Describe 'install()'
+  Include ./include.sh
+    It 'should be me'
+      When call i_am
+      The output should eq 'v0.4'
+    End
+    It 'should not be superuser'
+      When call i_am_root
+      The status should not be success
+    End
+    It 'should install AstrXbian'
+      When call i_should_install
+      The status should be success
     End
   End
 End