diff --git a/README.md b/README.md
index 98e7dfd..e1a9393 100644
--- a/README.md
+++ b/README.md
@@ -19,3 +19,5 @@ git push
 ```
 
 - Create PR
+
+## Testing
diff --git a/ch1-lab-setup/sample/hosts.ini b/ch1-lab-setup/sample/hosts.ini
index 8a716fa..5751aeb 100644
--- a/ch1-lab-setup/sample/hosts.ini
+++ b/ch1-lab-setup/sample/hosts.ini
@@ -1,2 +1,10 @@
 [linux]
 192.168.100.21
+
+
+[all:vars]
+featureA=disabled
+
+
+[dev:vars]
+featureA=enabled
\ No newline at end of file
diff --git a/ch2-inventory/ansible.cfg b/ch2-inventory/ansible.cfg
index 9119ec0..621af78 100644
--- a/ch2-inventory/ansible.cfg
+++ b/ch2-inventory/ansible.cfg
@@ -1,3 +1,3 @@
 [defaults]
 host_key_checking = False
-inventory = inventory
\ No newline at end of file
+inventory = inventory/03-hostgroups-children.ini
\ No newline at end of file
diff --git a/ch2-inventory/inventory/03-hostgroups-children copy.ini b/ch2-inventory/inventory/03-hostgroups-children.ini
similarity index 100%
rename from ch2-inventory/inventory/03-hostgroups-children copy.ini
rename to ch2-inventory/inventory/03-hostgroups-children.ini
diff --git a/ch2-inventory/inventory/04-hostvars.ini b/ch2-inventory/inventory/04-hostvars.ini
index 15f623f..5952d5a 100644
--- a/ch2-inventory/inventory/04-hostvars.ini
+++ b/ch2-inventory/inventory/04-hostvars.ini
@@ -1,13 +1,12 @@
 fakehost.local
 
 [ubuntu]
-ubuntu11 ansible_host=192.168.100.11 foo=bar
-ubuntu12 ansible_host=192.168.100.12
+ubuntu11
+ubuntu12
 
 [centos]
-centos21 ansible_host=192.168.100.21
-centos22 ansible_host=192.168.100.22
-
+centos21
+centos22
 
 [linux:children]
 ubuntu
diff --git a/ch2-inventory/inventory/group_vars/all.ini b/ch2-inventory/inventory/group_vars/all.ini
deleted file mode 100644
index 4dd47cb..0000000
--- a/ch2-inventory/inventory/group_vars/all.ini
+++ /dev/null
@@ -1 +0,0 @@
-foo=bar4
\ No newline at end of file
diff --git a/ch2-inventory/inventory/host_vars/ubuntu11.ini b/ch2-inventory/inventory/host_vars/ubuntu11.ini
deleted file mode 100644
index 67d3b24..0000000
--- a/ch2-inventory/inventory/host_vars/ubuntu11.ini
+++ /dev/null
@@ -1 +0,0 @@
-foo=barbarbar
\ No newline at end of file