diff --git a/tests/prepare_tests.sh b/tests/prepare_tests.sh
index b7623638..617a4ad4 100755
--- a/tests/prepare_tests.sh
+++ b/tests/prepare_tests.sh
@@ -4,5 +4,5 @@ make clean
 make -j DEBUG=1  # compile optionally with PRINTF
 mv bin/ tests/bitcoin-bin
 make clean
-make -j DEBUG=1 COIN=bitcoin_testnet
+make -j DEBUG=1 COIN=bitcoin_testnet_legacy
 mv bin/ tests/bitcoin-testnet-bin