diff --git a/bitcoin/core/Dockerfile b/bitcoin/core/Dockerfile
index 0bb465c..f541abb 100644
--- a/bitcoin/core/Dockerfile
+++ b/bitcoin/core/Dockerfile
@@ -27,6 +27,9 @@ ENV USER nan
 ENV PASS nan
 ENV ENABLE_RPC 0
 ENV ENABLE_AUTH 1
+ENV REGTEST 0
+ENV TESTNET3 0
+ENV TESTNET4 0
 
 EXPOSE 8333
 EXPOSE 8332
diff --git a/bitcoin/core/entrypoint.sh b/bitcoin/core/entrypoint.sh
index ef6180a..0eacdc7 100644
--- a/bitcoin/core/entrypoint.sh
+++ b/bitcoin/core/entrypoint.sh
@@ -5,6 +5,21 @@ echo "txindex=$TXINDEX" >> /btc.conf
 echo "coinstatsindex=$TXINDEX" >> /btc.conf
 echo "datadir=/data" >> /btc.conf
 
+if [ $REGTEST == 1 ]
+then
+    echo "regtest=1" >> /btc.conf
+fi
+
+if [ $TESTNET3 == 1 ]
+then
+    echo "testnet=1" >> /btc.conf
+fi
+
+if [ $TESTNET4 == 1 ]
+then
+    echo "testnet4=1" >> /btc.conf
+fi
+
 if [ $ENABLE_RPC == 1 ]
 then
     echo "server=1" >> /btc.conf