diff --git a/sonic/pool_test.go b/sonic/pool_test.go
index 0a01daf..9a48cf7 100644
--- a/sonic/pool_test.go
+++ b/sonic/pool_test.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"net"
-	"sync"
 	"testing"
 	"time"
 
@@ -14,7 +13,6 @@ import (
 func TestPool_Reconnect(t *testing.T) {
 	host, port, pass := getSonicConfig(t)
 
-	closeAllCond := sync.NewCond(&sync.Mutex{})
 	proxyLn, proxyDoneCh := runTCPProxy(t,
 		fmt.Sprintf("%s:%d", host, port), // Target addr.
 		"127.0.0.1:0",                    // Proxy addr.
@@ -22,7 +20,12 @@ func TestPool_Reconnect(t *testing.T) {
 
 	proxyHost, proxyPort := mustSplitHostPort(t, proxyLn.Addr().String())
 
-	ing, err := sonic.NewIngester(proxyHost, proxyPort, pass)
+	ing, err := sonic.NewIngester(
+		proxyHost,
+		proxyPort,
+		pass,
+		sonic.OptionPoolPingThreshold(time.Nanosecond),
+	)
 	if err != nil {
 		t.Fatal("NewIngester", err)
 	}
@@ -34,10 +37,6 @@ func TestPool_Reconnect(t *testing.T) {
 		t.Fatal("Ping", err)
 	}
 
-	closeAllCond.L.Lock()
-	closeAllCond.Broadcast()
-	closeAllCond.L.Unlock()
-
 	err = ing.Ping()
 	if err != nil {
 		t.Fatal("Ping", err)
@@ -85,6 +84,80 @@ func TestPool_Reconnect(t *testing.T) {
 	}
 }
 
+func TestPool_Reconnect_Threshold(t *testing.T) {
+	host, port, pass := getSonicConfig(t)
+
+	proxyLn, proxyDoneCh := runTCPProxy(t,
+		fmt.Sprintf("%s:%d", host, port), // Target addr.
+		"127.0.0.1:0",                    // Proxy addr.
+	)
+
+	proxyHost, proxyPort := mustSplitHostPort(t, proxyLn.Addr().String())
+
+	ing, err := sonic.NewIngester(
+		proxyHost,
+		proxyPort,
+		pass,
+		sonic.OptionPoolPingThreshold(time.Minute),
+	)
+	if err != nil {
+		t.Fatal("NewIngester", err)
+	}
+
+	// Connection healthy, ping should work.
+
+	err = ing.Ping()
+	if err != nil {
+		t.Fatal("Ping", err)
+	}
+
+	err = ing.Ping()
+	if err != nil {
+		t.Fatal("Ping", err)
+	}
+
+	// Close connection, ping should not work.
+
+	err = proxyLn.Close()
+	if err != nil {
+		t.Fatal("Close", err)
+	}
+
+	select {
+	case <-proxyDoneCh:
+	case <-time.After(2 * time.Second):
+		t.Fatal("Timeout")
+	}
+
+	err = ing.Ping()
+	if err == nil {
+		t.Fatal("Ping", err)
+	}
+
+	// Reconnect in threshold, ping still should not work.
+
+	proxyLn, proxyDoneCh = runTCPProxy(t,
+		fmt.Sprintf("%s:%d", host, port),           // Target addr.
+		fmt.Sprintf("%s:%d", proxyHost, proxyPort), // Proxy addr.
+	)
+
+	err = ing.Ping()
+	if err == nil {
+		t.Fatal("Ping", err)
+	}
+
+	err = proxyLn.Close()
+	if err != nil {
+		t.Fatal("Close", err)
+	}
+
+	select {
+	case <-proxyDoneCh:
+	case <-time.After(2 * time.Second):
+		t.Fatal("Timeout")
+	}
+}
+
 func runTCPProxy(
 	tb testing.TB,
 	targetAddr string,