tests: remove panics from test fixtures (#7522)

node/node_test.go

@@ -10,6 +10,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/fortytw2/leaktest"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	dbm "github.com/tendermint/tm-db"
@@ -151,6 +152,7 @@ func TestNodeSetAppVersion(t *testing.T) {
 func TestNodeSetPrivValTCP(t *testing.T) {
 	addr := "tcp://" + testFreeAddr(t)
 
+	t.Cleanup(leaktest.Check(t))
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
@@ -173,9 +175,7 @@ func TestNodeSetPrivValTCP(t *testing.T) {
 
 	go func() {
 		err := signerServer.Start(ctx)
-		if err != nil {
-			panic(err)
-		}
+		require.NoError(t, err)
 	}()
 	defer signerServer.Stop() //nolint:errcheck // ignore for tests