diff --git a/decorators_test.go b/decorators_test.go
index 17b13b7..7ad40e0 100644
--- a/decorators_test.go
+++ b/decorators_test.go
@@ -7,6 +7,7 @@
 	"io/ioutil"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/vbauerster/mpb"
 )
@@ -50,3 +51,26 @@
 		t.Errorf("Expected: %s, got %s\n", want, out)
 	}
 }
+
+func TestAppendPercentage(t *testing.T) {
+	var buf bytes.Buffer
+	p := mpb.New().SetOut(&buf)
+
+	bar := p.AddBar(100).TrimLeftSpace().TrimRightSpace().
+		AppendPercentage(0, 0)
+
+	for i := 0; i < 100; i++ {
+		time.Sleep(10 * time.Millisecond)
+		bar.Incr(1)
+	}
+
+	p.Stop()
+
+	bytes := removeLastRune(buf.Bytes())
+	out := string(bytes)
+	out = out[strings.LastIndex(out, "]")+1:]
+	want := "100 %"
+	if out != want {
+		t.Errorf("Expected: %s, got %s\n", want, out)
+	}
+}