diff --git a/main.go b/main.go
index e65f3d7..b138447 100644
--- a/main.go
+++ b/main.go
@@ -120,6 +120,9 @@ func main() {
 	dockerRegistryFlag := app.Flag("docker-registry", "Registry for docker")
 	dockerRegistry := dockerRegistryFlag.Default(conf.Docker.Registry).String()
 
+	thresholdFlag := app.Flag("threshold", "Reliablity threshold for exit code")
+	threshold := thresholdFlag.Default("1.00").Float64()
+
 	pewCommand := app.Command("pew", "Build, run and test module/exploit")
 
 	pewMax := pewCommand.Flag("max", "Test no more than X kernels").
@@ -332,7 +335,7 @@ func main() {
 		log.Fatalln(err)
 	}
 
-	if somethingFailed {
+	if successRate(state) < *threshold {
 		os.Exit(1)
 	}
 }
diff --git a/pew.go b/pew.go
index 1307126..dd70802 100644
--- a/pew.go
+++ b/pew.go
@@ -26,7 +26,17 @@ import (
 	"code.dumpstack.io/tools/out-of-tree/qemu"
 )
 
-var somethingFailed = false
+type runstate struct {
+	Overall, Success float64
+}
+
+var (
+	state runstate
+)
+
+func successRate(state runstate) float64 {
+	return state.Success / state.Overall
+}
 
 const pathDevNull = "/dev/null"
 
@@ -134,11 +144,12 @@ func testKernelExploit(q *qemu.System, ka config.Artifact,
 }
 
 func genOkFail(name string, ok bool) (aurv aurora.Value) {
+	state.Overall += 1
 	if ok {
+		state.Success += 1
 		s := " " + name + " SUCCESS "
 		aurv = aurora.BgGreen(aurora.Black(s))
 	} else {
-		somethingFailed = true
 		s := " " + name + " FAILURE "
 		aurv = aurora.BgRed(aurora.Gray(aurora.Bold(s)))
 	}