diff --git a/net_test.go b/net_test.go
new file mode 100644
index 0000000..1256ab1
--- /dev/null
+++ b/net_test.go
@@ -0,0 +1,54 @@
+package gopsutil
+
+import (
+	"testing"
+	"fmt"
+)
+
+func TestAddrString(t *testing.T) {
+	v := Addr{IP: "192.168.0.1", Port: 8000}
+
+	s := fmt.Sprintf("%v", v)
+	if s != "{\"ip\":\"192.168.0.1\",\"port\":8000}" {
+		t.Errorf("Addr string is invalid: %v", v)
+	}
+}
+
+func TestNetIOCountersStatString(t *testing.T) {
+	v := NetIOCountersStat{
+		Name: "test",
+		BytesSent: 100,
+	}
+	e := `{"name":"test","bytes_sent":100,"bytes_recv":0,"packets_sent":0,"packets_recv":0,"errin":0,"errout":0,"dropin":0,"dropout":0}`
+	if e != fmt.Sprintf("%v", v) {
+		t.Errorf("NetIOCountersStat string is invalid: %v", v)
+	}
+}
+
+func TestNetConnectionStatString(t *testing.T) {
+	v := NetConnectionStat{
+		Fd: 10,
+		Family: 10,
+		Type: 10,
+	}
+	e := `{"fd":10,"family":10,"type":10,"laddr":{"ip":"","port":0},"raddr":{"ip":"","port":0},"status":"","pid":0}`
+	if e != fmt.Sprintf("%v", v) {
+		t.Errorf("NetConnectionStat string is invalid: %v", v)
+	}
+
+}
+
+func TestNetIOCounters(t *testing.T) {
+	v, err := NetIOCounters(true)
+	if err != nil{
+		t.Errorf("Could not get NetIOCounters: %v", err)
+	}
+	if len(v) == 0{
+		t.Errorf("Could not get NetIOCounters: %v", v)
+	}
+	for _, vv := range(v){
+		if vv.Name == ""{
+			t.Errorf("Invalid NetIOCounters: %v", vv)
+		}
+	}
+}