diff --git a/chart.go b/chart.go
index 6e9d40a..3956923 100644
--- a/chart.go
+++ b/chart.go
@@ -178,6 +178,7 @@ func (c Chart) getRanges() (xrange, yrange, yrangeAlt Range) {
 					} else if seriesAxis == YAxisSecondary {
 						minya = math.Min(minya, vy)
 						maxya = math.Max(maxya, vy)
+						hasSecondaryAxis = true
 					}
 				}
 			}
diff --git a/value_formatter_test.go b/value_formatter_test.go
index 83b347e..cc402b4 100644
--- a/value_formatter_test.go
+++ b/value_formatter_test.go
@@ -11,7 +11,7 @@ func TestTimeValueFormatterWithFormat(t *testing.T) {
 	assert := assert.New(t)
 
 	d := time.Now()
-	di := d.Unix()
+	di := TimeToFloat64(d)
 	df := float64(di)
 
 	s := TimeValueFormatterWithFormat(d, DefaultDateFormat)