diff --git a/t/109-timer-hup.t b/t/109-timer-hup.t
index 2c197c2826..bff1b33466 100644
--- a/t/109-timer-hup.t
+++ b/t/109-timer-hup.t
@@ -336,7 +336,7 @@ lua found 100 pending timers
     lua_shared_dict test_dict 1m;
 
     server {
-        listen 12355;
+        listen $TEST_NGINX_RAND_PORT_1;
         location = /foo {
             echo 'foo';
         }
@@ -350,7 +350,7 @@ lua found 100 pending timers
 
             -- Connect the socket
             local sock = ngx.socket.tcp()
-            local ok,err = sock:connect("127.0.0.1", 12355)
+            local ok,err = sock:connect("127.0.0.1", $TEST_NGINX_RAND_PORT_1)
             if not ok then
                 ngx.log(ngx.ERR, err)
             end
diff --git a/t/138-balancer.t b/t/138-balancer.t
index 2894157e0e..d9c943388e 100644
--- a/t/138-balancer.t
+++ b/t/138-balancer.t
@@ -535,7 +535,7 @@ failed to set more tries: reduced tries due to limit
     lua_package_path "../lua-resty-core/lib/?.lua;;";
 
     server {
-        listen 127.0.0.1:8888;
+        listen 127.0.0.1:$TEST_NGINX_RAND_PORT_1;
 
         location / {
             return 200 "it works";
@@ -543,8 +543,8 @@ failed to set more tries: reduced tries due to limit
     }
 
     upstream foo {
-        server 127.0.0.1:8888 max_fails=0;
-        server 127.0.0.1:8889 max_fails=0 weight=9999;
+        server 127.0.0.1:$TEST_NGINX_RAND_PORT_1 max_fails=0;
+        server 127.0.0.1:$TEST_NGINX_RAND_PORT_2 max_fails=0 weight=9999;
 
         balancer_by_lua_block {
             local bal = require "ngx.balancer"
diff --git a/t/139-ssl-cert-by.t b/t/139-ssl-cert-by.t
index 38296352f5..502e0ac184 100644
--- a/t/139-ssl-cert-by.t
+++ b/t/139-ssl-cert-by.t
@@ -456,7 +456,7 @@ received memc reply: OK
 === TEST 5: ngx.exit(0) - no yield
 --- http_config
     server {
-        listen 127.0.0.2:8080 ssl;
+        listen 127.0.0.2:$TEST_NGINX_RAND_PORT_1 ssl;
         server_name test.com;
         ssl_certificate_by_lua_block {
             ngx.exit(0)
@@ -484,7 +484,7 @@ received memc reply: OK
 
                 sock:settimeout(2000)
 
-                local ok, err = sock:connect("127.0.0.2", 8080)
+                local ok, err = sock:connect("127.0.0.2", $TEST_NGINX_RAND_PORT_1)
                 if not ok then
                     ngx.say("failed to connect: ", err)
                     return
@@ -523,7 +523,7 @@ should never reached here
 === TEST 6: ngx.exit(ngx.ERROR) - no yield
 --- http_config
     server {
-        listen 127.0.0.2:8080 ssl;
+        listen 127.0.0.2:$TEST_NGINX_RAND_PORT_1 ssl;
         server_name test.com;
         ssl_certificate_by_lua_block {
             ngx.exit(ngx.ERROR)
@@ -551,7 +551,7 @@ should never reached here
 
                 sock:settimeout(2000)
 
-                local ok, err = sock:connect("127.0.0.2", 8080)
+                local ok, err = sock:connect("127.0.0.2", $TEST_NGINX_RAND_PORT_1)
                 if not ok then
                     ngx.say("failed to connect: ", err)
                     return
@@ -593,7 +593,7 @@ should never reached here
 === TEST 7: ngx.exit(0) -  yield
 --- http_config
     server {
-        listen 127.0.0.2:8080 ssl;
+        listen 127.0.0.2:$TEST_NGINX_RAND_PORT_1 ssl;
         server_name test.com;
         ssl_certificate_by_lua_block {
             ngx.sleep(0.001)
@@ -623,7 +623,7 @@ should never reached here
 
                 sock:settimeout(2000)
 
-                local ok, err = sock:connect("127.0.0.2", 8080)
+                local ok, err = sock:connect("127.0.0.2", $TEST_NGINX_RAND_PORT_1)
                 if not ok then
                     ngx.say("failed to connect: ", err)
                     return
@@ -662,7 +662,7 @@ should never reached here
 === TEST 8: ngx.exit(ngx.ERROR) - yield
 --- http_config
     server {
-        listen 127.0.0.2:8080 ssl;
+        listen 127.0.0.2:$TEST_NGINX_RAND_PORT_1 ssl;
         server_name test.com;
         ssl_certificate_by_lua_block {
             ngx.sleep(0.001)
@@ -692,7 +692,7 @@ should never reached here
 
                 sock:settimeout(2000)
 
-                local ok, err = sock:connect("127.0.0.2", 8080)
+                local ok, err = sock:connect("127.0.0.2", $TEST_NGINX_RAND_PORT_1)
                 if not ok then
                     ngx.say("failed to connect: ", err)
                     return
@@ -734,7 +734,7 @@ should never reached here
 === TEST 9: lua exception - no yield
 --- http_config
     server {
-        listen 127.0.0.2:8080 ssl;
+        listen 127.0.0.2:$TEST_NGINX_RAND_PORT_1 ssl;
         server_name test.com;
         ssl_certificate_by_lua_block {
             error("bad bad bad")
@@ -762,7 +762,7 @@ should never reached here
 
                 sock:settimeout(2000)
 
-                local ok, err = sock:connect("127.0.0.2", 8080)
+                local ok, err = sock:connect("127.0.0.2", $TEST_NGINX_RAND_PORT_1)
                 if not ok then
                     ngx.say("failed to connect: ", err)
                     return
@@ -805,7 +805,7 @@ should never reached here
 === TEST 10: lua exception - yield
 --- http_config
     server {
-        listen 127.0.0.2:8080 ssl;
+        listen 127.0.0.2:$TEST_NGINX_RAND_PORT_1 ssl;
         server_name test.com;
         ssl_certificate_by_lua_block {
             ngx.sleep(0.001)
@@ -834,7 +834,7 @@ should never reached here
 
                 sock:settimeout(2000)
 
-                local ok, err = sock:connect("127.0.0.2", 8080)
+                local ok, err = sock:connect("127.0.0.2", $TEST_NGINX_RAND_PORT_1)
                 if not ok then
                     ngx.say("failed to connect: ", err)
                     return