diff --git a/test/e2e/framework/exec.go b/test/e2e/framework/exec.go
index 8d528c37a..fe1e753fe 100644
--- a/test/e2e/framework/exec.go
+++ b/test/e2e/framework/exec.go
@@ -32,7 +32,7 @@ import (
 
 // GetLbAlgorithm returns algorithm identifier for the given backend
 func (f *Framework) GetLbAlgorithm(serviceName string, servicePort int) (string, error) {
-	backendName := fmt.Sprintf("%s-%s-%v", f.Namespace, serviceName, servicePort)
+	backendName := fmt.Sprintf("%s_%s_%v", f.Namespace, serviceName, servicePort)
 	cmd := fmt.Sprintf("/dbg backends get %s", backendName)
 
 	output, err := f.ExecIngressPod(cmd)
diff --git a/test/e2e/settings/default_ssl_certificate.go b/test/e2e/settings/default_ssl_certificate.go
index c48a1e87f..698fd1d87 100644
--- a/test/e2e/settings/default_ssl_certificate.go
+++ b/test/e2e/settings/default_ssl_certificate.go
@@ -68,7 +68,7 @@ var _ = framework.IngressNginxDescribe("[SSL] [Flag] default-ssl-certificate", f
 		f.EnsureIngress(ing)
 
 		ginkgo.By("making sure new ingress is deployed")
-		expectedConfig := fmt.Sprintf(`set $proxy_upstream_name "%v-%v-%v";`, f.Namespace, service, port)
+		expectedConfig := fmt.Sprintf(`set $proxy_upstream_name "%v_%v_%v";`, f.Namespace, service, port)
 		f.WaitForNginxServer("_", func(cfg string) bool {
 			return strings.Contains(cfg, expectedConfig)
 		})
@@ -90,7 +90,7 @@ var _ = framework.IngressNginxDescribe("[SSL] [Flag] default-ssl-certificate", f
 		assert.Nil(ginkgo.GinkgoT(), err)
 
 		ginkgo.By("making sure new ingress is deployed")
-		expectedConfig := fmt.Sprintf(`set $proxy_upstream_name "%v-%v-%v";`, f.Namespace, service, port)
+		expectedConfig := fmt.Sprintf(`set $proxy_upstream_name "%v_%v_%v";`, f.Namespace, service, port)
 		f.WaitForNginxServer(host, func(cfg string) bool {
 			return strings.Contains(cfg, expectedConfig)
 		})
diff --git a/test/e2e/tcpudp/tcp.go b/test/e2e/tcpudp/tcp.go
index 856184d18..d959dc152 100644
--- a/test/e2e/tcpudp/tcp.go
+++ b/test/e2e/tcpudp/tcp.go
@@ -66,7 +66,7 @@ var _ = framework.IngressNginxDescribe("[TCP] tcp-services", func() {
 
 		f.WaitForNginxConfiguration(
 			func(cfg string) bool {
-				return strings.Contains(cfg, fmt.Sprintf(`ngx.var.proxy_upstream_name="tcp-%v-%v-80"`,
+				return strings.Contains(cfg, fmt.Sprintf(`ngx.var.proxy_upstream_name="tcp-%v_%v_80"`,
 					f.Namespace, framework.EchoService))
 			})