chainntnfs: ensure previous test succeeded before running

chainntnfs/test/bitcoind/bitcoind_test.go

@@ -12,11 +12,15 @@ import (
 // TestInterfaces executes the generic notifier test suite against a bitcoind
 // powered chain notifier.
 func TestInterfaces(t *testing.T) {
-	t.Run("bitcoind", func(st *testing.T) {
+	success := t.Run("bitcoind", func(st *testing.T) {
 		st.Parallel()
 		chainntnfstest.TestInterfaces(st, "bitcoind")
 	})
 
+	if !success {
+		return
+	}
+
 	t.Run("bitcoind rpc polling", func(st *testing.T) {
 		st.Parallel()
 		chainntnfstest.TestInterfaces(st, "bitcoind-rpc-polling")