diff --git a/examples/basic_tc/delay/spec.yaml b/examples/basic_tc/delay/spec.yaml
new file mode 100644
index 0000000..37cdebc
--- /dev/null
+++ b/examples/basic_tc/delay/spec.yaml
@@ -0,0 +1,24 @@
+---
+nodes:
+- name: C0
+  image: slankdev/ubuntu:18.04
+  interfaces:
+  - { name: net0, type: direct, args: C1#net0 }
+- name: C1
+  image: slankdev/ubuntu:18.04
+  interfaces:
+  - { name: net0, type: direct, args: C0#net0 }
+
+node_configs:
+- name: C0
+  cmds:
+  - cmd: ip addr add 10.0.0.1/24 dev net0
+  - cmd: tc qdisc replace dev net0 root netem delay 10ms
+- name: C1
+  cmds:
+  - cmd: ip addr add 10.0.0.2/24 dev net0
+  - cmd: tc qdisc replace dev net0 root netem delay 10ms
+
+test:
+- cmds:
+  - cmd: docker exec C0 ping -c2 10.0.0.2
diff --git a/examples/basic_tc/spec.yaml b/examples/basic_tc/spec.yaml
deleted file mode 100644
index dbfc2ee..0000000
--- a/examples/basic_tc/spec.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
-# http://www.asciiflow.com
-nodes:                                             
-  - name: C0                                       
-    image: slankdev/ubuntu:18.04                   
-    interfaces:                                    
-      - { name: net0, type: direct, args: C1#net0 }
-  - name: C1                                       
-    image: slankdev/ubuntu:18.04                   
-    interfaces:                                    
-      - { name: net0, type: direct, args: C0#net0 }
-                                                   
-node_configs:                                      
-  - name: C0                                       
-    cmds:                                          
-      - cmd: ip addr add 10.0.0.1/24 dev net0
-      - cmd: tc qdisc replace dev net0 root netem delay 10ms
-  - name: C1                                       
-    cmds:                                          
-      - cmd: ip addr add 10.0.0.2/24 dev net0
-      - cmd: tc qdisc replace dev net0 root netem delay 10ms
-                                                   
-test:                                              
-  - cmds:                                          
-    - cmd: docker exec C0 ping -c2 10.0.0.2