diff --git a/artifact/artifact.go b/artifact/artifact.go
index dd1510a..61d149d 100644
--- a/artifact/artifact.go
+++ b/artifact/artifact.go
@@ -12,7 +12,6 @@ import (
 
 	"github.com/naoina/toml"
 	"github.com/rs/zerolog"
-	"github.com/rs/zerolog/log"
 
 	"code.dumpstack.io/tools/out-of-tree/config/dotfiles"
 	"code.dumpstack.io/tools/out-of-tree/distro"
@@ -338,8 +337,10 @@ func (ka Artifact) Process(slog zerolog.Logger, ki distro.KernelInfo,
 		slog.Debug().Str("duration", time.Since(start).String()).
 			Msg("build done")
 		if err != nil {
-			log.Error().Err(err).Msg("build")
+			slog.Error().Err(err).Msg("build")
 			return
+		} else {
+			slog.Info().Err(err).Msg("build success")
 		}
 		result.Build.Ok = true
 	} else {
diff --git a/artifact/process.go b/artifact/process.go
index 275b1dd..80b360d 100644
--- a/artifact/process.go
+++ b/artifact/process.go
@@ -313,8 +313,7 @@ func copyArtifactAndTest(slog zerolog.Logger, q *qemu.System, ka Artifact,
 
 		res.Test.Output, err = testKernelModule(q, ka, remoteTest)
 		if err != nil {
-			slog.Error().Err(err).Msg(res.Test.Output)
-			return
+			break
 		}
 		res.Test.Ok = true
 	case KernelExploit:
@@ -327,16 +326,14 @@ func copyArtifactAndTest(slog zerolog.Logger, q *qemu.System, ka Artifact,
 		res.Test.Output, err = testKernelExploit(q, ka, remoteTest,
 			remoteExploit)
 		if err != nil {
-			slog.Error().Err(err).Msg(res.Test.Output)
-			return
+			break
 		}
 		res.Run.Ok = true // does not really used
 		res.Test.Ok = true
 	case Script:
 		res.Test.Output, err = runScript(q, remoteTest)
 		if err != nil {
-			slog.Error().Err(err).Msg(res.Test.Output)
-			return
+			break
 		}
 		res.Run.Ok = true
 		res.Test.Ok = true
@@ -344,7 +341,12 @@ func copyArtifactAndTest(slog zerolog.Logger, q *qemu.System, ka Artifact,
 		slog.Fatal().Msg("Unsupported artifact type")
 	}
 
-	slog.Info().Msgf("\n%v\n", res.Test.Output)
+	if err != nil || !res.Test.Ok {
+		slog.Error().Err(err).Msgf("test error\n%v\n", res.Test.Output)
+		return
+	}
+
+	slog.Info().Msgf("test success\n%v\n", res.Test.Output)
 
 	_, err = q.Command("root", "echo")
 	if err != nil {