diff --git a/ch09.asciidoc b/ch09.asciidoc
index 5d9f0a90..828de178 100644
--- a/ch09.asciidoc
+++ b/ch09.asciidoc
@@ -410,4 +410,4 @@ $ bitcoin-cli -regtest getbalance
 
 ((("development environment", "test blockchains and")))Bitcoin's various blockchains (+regtest+, +segnet+, +testnet3+, +mainnet+) offer a range of testing environments for bitcoin development. Use the test blockchains whether you are developing for Bitcoin Core, or another full-node consensus client; an application such as a wallet, exchange, ecommerce site; or even developing novel smart contracts and complex scripts.
 
-You can use the test blockchains to establish a development pipeline. Test your code locally on a +regtest+ as you develop it. Once, ready to try it on a public network, switch to +testnet+ to expose your code to a more dynamic environment with more diversity of code and applications. Finally, once you are confident your code works as expected, switch to +mainnet+ to deploy it in production. As you make changes, improvements, bug fixes, etc., start the pipeline again, deploying each change first on +regtest+, then on +testnet+, and finally into production.((("", startref="BCTtest09")))
+You can use the test blockchains to establish a development pipeline. Test your code locally on a +regtest+ as you develop it. Once you are ready to try it on a public network, switch to +testnet+ to expose your code to a more dynamic environment with more diversity of code and applications. Finally, once you are confident your code works as expected, switch to +mainnet+ to deploy it in production. As you make changes, improvements, bug fixes, etc., start the pipeline again, deploying each change first on +regtest+, then on +testnet+, and finally into production.((("", startref="BCTtest09")))