diff --git a/test/fixtures/e2eapi.go b/test/fixtures/e2eapi.go
index 3f0d9d9646..12406f4478 100644
--- a/test/fixtures/e2eapi.go
+++ b/test/fixtures/e2eapi.go
@@ -23,6 +23,9 @@ import (
 	"log"
 	"net/http"
 	"strings"
+	"time"
+
+	"k8s.io/apimachinery/pkg/util/wait"
 )
 
 func InvokeE2EAPI(format string, args ...interface{}) string {
@@ -51,7 +54,27 @@ func InvokeE2EAPI(format string, args ...interface{}) string {
 
 func InvokeE2EAPIPOST(format string, body string, args ...interface{}) string {
 	url := "http://127.0.0.1:8378" + fmt.Sprintf(format, args...)
-	resp, err := http.Post(url, "application/json", strings.NewReader(body))
+
+	var err error
+	var resp *http.Response
+	// Invoking POST can fail due to "500 Internal Server Error". It's because the server is still booting up and not ready to serve requests.
+	// To prevent such issue, we apply retry strategy.
+	// 3 attempts with 5 second fixed wait time are tested sufficient for it.
+	var retryBackOff = wait.Backoff{
+		Factor:   1,
+		Jitter:   0,
+		Steps:    3,
+		Duration: time.Second * 5,
+	}
+	_ = wait.ExponentialBackoff(retryBackOff, func() (done bool, err error) {
+		resp, err = http.Post(url, "application/json", strings.NewReader(body))
+		if err == nil && resp.StatusCode < 300 {
+			return true, nil
+		}
+		fmt.Printf("Got error %v, response %v, retrying.\n", err, *resp)
+		return false, nil
+	})
+
 	if err != nil {
 		panic(err)
 	}