diff --git a/BTCPayServer.Tests/docker-compose.yml b/BTCPayServer.Tests/docker-compose.yml
index 7456fa4c5..cb2000756 100644
--- a/BTCPayServer.Tests/docker-compose.yml
+++ b/BTCPayServer.Tests/docker-compose.yml
@@ -98,7 +98,7 @@ services:
     restart: unless-stopped
     image: btcpayserver/bitcoin:0.17.0
     environment:
-      BITCOIN_NETWORK:regtest
+      BITCOIN_NETWORK: regtest
       BITCOIN_EXTRA_ARGS: |-
         rpcuser=ceiwHEbqWI83
         rpcpassword=DwubwWsoo3