diff --git a/cmd/check_example2/main.go b/cmd/check_example2/main.go
new file mode 100644
index 0000000..ba23761
--- /dev/null
+++ b/cmd/check_example2/main.go
@@ -0,0 +1,50 @@
+package main
+
+import (
+	"github.com/NETWAYS/go-check"
+	"github.com/NETWAYS/go-check/perfdata"
+	"github.com/NETWAYS/go-check/result"
+)
+
+func main() {
+	defer check.CatchPanic()
+
+	var overall result.Overall
+
+	check1 := result.PartialResult{}
+
+	check1.Output = "Check1"
+	err := check1.SetState(check.OK)
+
+	if err != nil {
+		check.ExitError(err)
+	}
+
+	check1.Perfdata.Add(&perfdata.Perfdata{
+		Label: "foo",
+		Value: 23,
+	})
+
+	check2 := result.PartialResult{}
+
+	check2.Output = "Check2"
+	err = check2.SetState(check.Warning)
+
+	if err != nil {
+		check.ExitError(err)
+	}
+
+	check2.Perfdata.Add(&perfdata.Perfdata{
+		Label: "bar",
+		Value: 42,
+	})
+	check2.Perfdata.Add(&perfdata.Perfdata{
+		Label: "foo2 bar",
+		Value: 46,
+	})
+
+	overall.AddSubcheck(check1)
+	overall.AddSubcheck(check2)
+
+	check.ExitRaw(overall.GetStatus(), overall.GetOutput())
+}
diff --git a/cmd/check_example2/main_test.go b/cmd/check_example2/main_test.go
new file mode 100644
index 0000000..4e644a4
--- /dev/null
+++ b/cmd/check_example2/main_test.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"os"
+	"testing"
+
+	"github.com/NETWAYS/go-check/testhelper"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMyMain(t *testing.T) {
+	stdout := testhelper.RunMainTest(main)
+
+	resultString := `[WARNING] - states: warning=1 ok=1
+\_ [OK] Check1
+\_ [WARNING] Check2
+|foo=23 bar=42 'foo2 bar'=46
+
+would exit with code 1
+`
+
+	assert.Equal(t, resultString, stdout)
+}
+
+func TestMain(m *testing.M) {
+	testhelper.EnableTestMode()
+	os.Exit(m.Run())
+}
diff --git a/perfdata/list_test.go b/perfdata/list_test.go
index d629d3e..ac758d6 100644
--- a/perfdata/list_test.go
+++ b/perfdata/list_test.go
@@ -1,6 +1,11 @@
 package perfdata
 
-import "fmt"
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
 
 func ExamplePerfdataList() {
 	list := PerfdataList{}
@@ -12,3 +17,11 @@ func ExamplePerfdataList() {
 	// Output:
 	// test1=23 test2=42
 }
+
+func TestPerfdataListFormating(t *testing.T) {
+	list := PerfdataList{}
+	list.Add(&Perfdata{Label: "test1", Value: 23})
+	list.Add(&Perfdata{Label: "test2", Value: 42})
+
+	assert.Equal(t, "test1=23 test2=42", list.String())
+}
diff --git a/result/overall_test.go b/result/overall_test.go
index 021e9e1..ce8ede0 100644
--- a/result/overall_test.go
+++ b/result/overall_test.go
@@ -348,6 +348,42 @@ func TestOverall_withSubchecks_PartialResultStatus(t *testing.T) {
 	assert.Equal(t, 0, overall.GetStatus())
 }
 
+func TestSubchecksPerfdata(t *testing.T) {
+	var overall Overall
+
+	check1 := PartialResult{
+		state:  check.OK,
+		Output: "Check1",
+		Perfdata: perfdata.PerfdataList{
+			&perfdata.Perfdata{
+				Label: "foo",
+				Value: 23,
+			},
+			&perfdata.Perfdata{
+				Label: "bar",
+				Value: 42,
+			},
+		},
+	}
+	check2 := PartialResult{
+		state:  check.Warning,
+		Output: "Check2",
+		Perfdata: perfdata.PerfdataList{
+			&perfdata.Perfdata{
+				Label: "foo2 bar",
+				Value: 46,
+			},
+		},
+	}
+
+	overall.AddSubcheck(check1)
+	overall.AddSubcheck(check2)
+
+	resultString := "states: warning=1 ok=1\n\\_ [OK] Check1\n\\_ [WARNING] Check2\n|foo=23 bar=42 'foo2 bar'=46\n"
+
+	assert.Equal(t, resultString, overall.GetOutput())
+}
+
 func TestDefaultStates1(t *testing.T) {
 	var overall Overall