diff --git a/chia/util/default_root.py b/chia/util/default_root.py
index 35a964fbf713..f7d673f1fdbd 100644
--- a/chia/util/default_root.py
+++ b/chia/util/default_root.py
@@ -1,4 +1,4 @@
 import os
 from pathlib import Path
 
-DEFAULT_ROOT_PATH = Path(os.path.expanduser(os.getenv("CHIA_ROOT", "~/.chia/mainnet"))).resolve()
+DEFAULT_ROOT_PATH = Path(os.path.expanduser(os.getenv("CHIA_ROOT", "~/.chia/testnet9"))).resolve()
diff --git a/chia/util/initial-config.yaml b/chia/util/initial-config.yaml
index 1f4a348d9d1f..a80e5e8eceaf 100644
--- a/chia/util/initial-config.yaml
+++ b/chia/util/initial-config.yaml
@@ -69,6 +69,17 @@ network_overrides: &network_overrides
       MEMPOOL_BLOCK_BUFFER: 10
       EPOCH_BLOCKS: 768
       DIFFICULTY_STARTING: 30
+    testnet9:
+      DIFFICULTY_CONSTANT_FACTOR: 10052721566054
+      GENESIS_CHALLENGE: 7319a0d4a23e5c4fbaab34d1ec65b82d147cd09b6e8f97098bc00151bdce922a
+      GENESIS_PRE_FARM_FARMER_PUZZLE_HASH: 3d8765d3a597ec1d99663f6c9816d915b9f68613ac94009884c4addaefcce6af
+      GENESIS_PRE_FARM_POOL_PUZZLE_HASH: d23da14695a188ae5708dd152263c4db883eb27edeb936178d4d988b8f3ce5fc
+      INITIAL_FREEZE_END_TIMESTAMP: 1619661600  # 2021-04-28 19:00:00
+      MIN_PLOT_SIZE: 18
+      NETWORK_TYPE: 1
+      MEMPOOL_BLOCK_BUFFER: 10
+      EPOCH_BLOCKS: 768
+      DIFFICULTY_STARTING: 30
   config:
     mainnet:
       address_prefix: "xch"
@@ -86,8 +97,11 @@ network_overrides: &network_overrides
     testnet7:
       address_prefix: "txch"
       default_full_node_port: 58444
+    testnet9:
+      address_prefix: "txch"
+      default_full_node_port: 58445
 
-selected_network: &selected_network "mainnet"
+selected_network: &selected_network "testnet9"
 ALERTS_URL: https://download.chia.net/notify/mainnet_alert.txt
 CHIA_ALERTS_PUBKEY: 89b7fd87cb56e926ecefb879a29aae308be01f31980569f6a75a69d2a9a69daefd71fb778d865f7c50d6c967e3025937
 
@@ -163,7 +177,7 @@ farmer:
   # The farmer will attempt to connect to this full node and harvester
   full_node_peer:
     host: *self_hostname
-    port: 8444
+    port: 58445
   harvester_peer:
     host: *self_hostname
     port: 8448
@@ -212,7 +226,7 @@ timelord:
       - 150000
   full_node_peer:
       host: *self_hostname
-      port: 8444
+      port: 58445
   # Maximum number of seconds allowed for a client to reconnect to the server.
   max_connection_time: 60
   # The ip and port where the TCP clients will connect.
@@ -247,7 +261,7 @@ timelord:
 
 full_node:
   # The full node server (if run) will run on this port
-  port: 8444
+  port: 58445
 
   # Run multiple nodes with different databases by changing the database_path
   database_path: db/blockchain_v1_CHALLENGE.sqlite
@@ -302,7 +316,7 @@ full_node:
   # List of trusted DNS seeders to bootstrap from.
   # If you modify this, please change the hardcode as well from FullNode.set_server()
   dns_servers:
-    - "dns-introducer.chia.net"
+    - "dns-introducer-testnet9-poolstestnet9.chia.net"
   farmer_peer:
       host: *self_hostname
       port: 8447
@@ -310,8 +324,8 @@ full_node:
       host: *self_hostname
       port: 8446
   introducer_peer:
-      host: introducer.chia.net  # Chia AWS introducer IPv4/IPv6
-      port: 8444
+      host: testnet9-poolstestnet9-introducer-0.chia.net  # Chia AWS introducer IPv4/IPv6
+      port: 58445
   wallet_peer:
     host: *self_hostname
     port: 8449
@@ -377,7 +391,7 @@ wallet:
 
   full_node_peer:
     host: *self_hostname
-    port: 8444
+    port: 58445
 
   testing: False
   database_path: wallet/db/blockchain_wallet_v1_CHALLENGE_KEY.sqlite
@@ -394,8 +408,8 @@ wallet:
   recent_peer_threshold: 6000
 
   introducer_peer:
-    host: introducer.chia.net # Chia AWS introducer IPv4/IPv6
-    port: 8444
+    host: testnet9-poolstestnet9-introducer-0.chia.net # Chia AWS introducer IPv4/IPv6
+    port: 58445
 
   ssl:
     private_crt:  "config/ssl/wallet/private_wallet.crt"