diff --git a/ostat_test.go b/ostat_test.go
index ef1ce1f..e9ace90 100644
--- a/ostat_test.go
+++ b/ostat_test.go
@@ -1,6 +1,7 @@
 package ostat
 
 import (
+	"fmt"
 	"math"
 	"testing"
 )
@@ -267,3 +268,14 @@ func TestMidStreamStatWithData(t *testing.T) {
 		t.Errorf("max: %f != %f != %f", mss.Max, mss.Max, max2)
 	}
 }
+
+func TestString(t *testing.T) {
+	ps := NewPopulationStat()
+	for _, v := range []float64{1, 1, 2, 2} {
+		ps.Push(v)
+	}
+	expected := "{n:4 min:1 max:2 mean:1.5 variance:0.25 stdDev:0.5}"
+	if fmt.Sprint(ps) != expected {
+		t.Errorf("failed to generate correct string")
+	}
+}