diff --git a/t/admin/routes4.t b/t/admin/routes4.t
index 3c799be8be90..ba9ff44142e3 100644
--- a/t/admin/routes4.t
+++ b/t/admin/routes4.t
@@ -611,7 +611,7 @@ failed to read request body: request size 1678025 is greater than the maximum si
                         "methods": ["GET", "GET"],
                         "upstream": {
                             "nodes": {
-                                "httpbin.org:8080": 1,
+                                "apisix.com:8080": 1,
                                 "test.com:8080": 1
                             },
                             "type": "roundrobin",
diff --git a/t/admin/upstream4.t b/t/admin/upstream4.t
index 99c840f944f1..b657edc6e731 100644
--- a/t/admin/upstream4.t
+++ b/t/admin/upstream4.t
@@ -205,7 +205,7 @@ passed
                 ngx.HTTP_PUT,
                 [[{
                     "nodes": {
-                        "httpbin.org:8080": 1,
+                        "apisix.com:8080": 1,
                         "test.com:8080": 1
                     },
                     "type": "roundrobin",
diff --git a/t/config-center-yaml/route-upstream.t b/t/config-center-yaml/route-upstream.t
index 53b9d51d3fb2..d5353a449332 100644
--- a/t/config-center-yaml/route-upstream.t
+++ b/t/config-center-yaml/route-upstream.t
@@ -140,17 +140,17 @@ hello world
 routes:
     -
         id: 1
-        uri: /get
+        uri: /hello
         upstream_id: 1
 upstreams:
     -
         id: 1
         nodes:
-            "httpbin.org:80": 1
+            "test.com:1980": 1
         type: roundrobin
 #END
 --- request
-GET /get
+GET /hello
 --- error_code: 200
 
 
@@ -161,19 +161,19 @@ GET /get
 routes:
     -
         id: 1
-        uri: /get
+        uri: /hello
         upstream_id: 1
 upstreams:
     -
         id: 1
         nodes:
-            "httpbin.org:80": 1
+            "test.com:1980": 1
         type: chash
         hash_on: header
         key: "$aaa"
 #END
 --- request
-GET /get
+GET /hello
 --- error_code: 502
 --- error_log
 invalid configuration: failed to match pattern
diff --git a/t/node/merge-route.t b/t/node/merge-route.t
index 474e08abbd13..b09b272cf795 100644
--- a/t/node/merge-route.t
+++ b/t/node/merge-route.t
@@ -235,10 +235,10 @@ qr/merge_service_route.*"time_window":60/]
                 ngx.HTTP_PUT,
                 [[{
                     "upstream": {
-                        "scheme": "https",
+                        "scheme": "http",
                         "type": "roundrobin",
                         "nodes": {
-                            "httpbin.org:443": 1
+                            "test.com:1980": 1
                         }
                     }
                 }]]
@@ -266,10 +266,10 @@ passed
                 ngx.HTTP_PUT,
                 [[{
                     "uri": "/fake",
-                    "host": "httpbin.org",
+                    "host": "test.com",
                     "plugins": {
                         "proxy-rewrite": {
-                            "uri": "/get"
+                            "uri": "/echo"
                         }
                     },
                     "service_id": "1"
@@ -293,10 +293,9 @@ passed
 --- request
 GET /fake
 --- more_headers
-host: httpbin.org
---- response_body eval
-qr/"Host": "httpbin.org"/
---- timeout: 5
+host: test.com
+--- response_headers
+host: test.com
 
 
 
@@ -304,7 +303,7 @@ qr/"Host": "httpbin.org"/
 --- request
 GET /fake
 --- more_headers
-host: httpbin.orgxxx
+host: test.comxxx
 --- error_code: 404
 
 
diff --git a/t/node/route-domain.t b/t/node/route-domain.t
index 316f8c166c46..6fb376b83d5e 100644
--- a/t/node/route-domain.t
+++ b/t/node/route-domain.t
@@ -115,8 +115,7 @@ passed
 --- request
 GET /echo
 --- response_headers
-Host: test.com
---- timeout: 10
+host: test.com
 
 
 
@@ -157,8 +156,7 @@ passed
 --- request
 GET /echo
 --- response_headers
-Host: test.com:1980
---- timeout: 10
+host: test.com:1980
 
 
 
diff --git a/t/node/upstream-domain.t b/t/node/upstream-domain.t
index 35dccbb5ee04..24048467f390 100644
--- a/t/node/upstream-domain.t
+++ b/t/node/upstream-domain.t
@@ -110,7 +110,7 @@ qr/dns resolver domain: foo.com to \d+.\d+.\d+.\d+/
                 ngx.HTTP_PUT,
                 [[{
                     "nodes": {
-                        "httpbin.orgx:80": 0
+                        "test.comx:80": 0
                     },
                     "type": "roundrobin",
                     "desc": "new upstream"
@@ -150,8 +150,8 @@ GET /t
 status: 503
 status: 503
 --- error_log
-failed to parse domain: httpbin.orgx
-failed to parse domain: httpbin.orgx
+failed to parse domain: test.comx
+failed to parse domain: test.comx
 --- timeout: 10
 
 
diff --git a/t/node/upstream.t b/t/node/upstream.t
index b5d3acf2a121..c99b10aecad6 100644
--- a/t/node/upstream.t
+++ b/t/node/upstream.t
@@ -205,7 +205,7 @@ GET /t
                 ngx.HTTP_PUT,
                 [[{
                     "nodes": {
-                        "httpbin.org:80": 1
+                        "test.com:1980": 1
                     },
                     "type": "roundrobin",
                     "desc": "new upstream",
@@ -234,7 +234,7 @@ passed
             local code, body = t('/apisix/admin/routes/1',
                 ngx.HTTP_PUT,
                 [[{
-                    "uri": "/get",
+                    "uri": "/echo",
                     "upstream_id": "1"
                 }]]
                 )
@@ -254,9 +254,9 @@ passed
 
 === TEST 12: hit route
 --- request
-GET /get
---- response_body eval
-qr/"Host": "httpbin.org"/
+GET /echo
+--- response_headers
+host: test.com:1980
 
 
 
@@ -274,7 +274,7 @@ qr/"Host": "httpbin.org"/
                     "type": "roundrobin",
                     "desc": "new upstream",
                     "pass_host": "rewrite",
-                    "upstream_host": "httpbin.org"
+                    "upstream_host": "test.com"
                 }]]
                 )
 
@@ -299,7 +299,7 @@ passed
             local code, body = t('/apisix/admin/routes/1',
                 ngx.HTTP_PUT,
                 [[{
-                    "uri": "/uri",
+                    "uri": "/echo",
                     "upstream_id": "1"
                 }]]
                 )
@@ -319,9 +319,9 @@ passed
 
 === TEST 15: hit route
 --- request
-GET /uri
---- response_body eval
-qr/host: httpbin.org/
+GET /echo
+--- response_headers
+host: test.com
 
 
 
diff --git a/t/plugin/authz-casdoor.t b/t/plugin/authz-casdoor.t
index 926d3daef97a..25fab487a29d 100644
--- a/t/plugin/authz-casdoor.t
+++ b/t/plugin/authz-casdoor.t
@@ -129,12 +129,15 @@ done
                             "endpoint_addr":"]] .. fake_uri .. [[",
                             "client_id":"7ceb9b7fda4a9061ec1c",
                             "client_secret":"3416238e1edf915eac08b8fe345b2b95cdba7e04"
+                        },
+                        "proxy-rewrite": {
+                            "uri": "/echo"
                         }
                     },
                     "upstream": {
                         "type": "roundrobin",
                         "nodes": {
-                        "httpbin.org:80": 1
+                            "test.com:1980": 1
                         }
                     }
                 }]]
@@ -466,12 +469,15 @@ apisix:
                             "endpoint_addr": "http://127.0.0.1:10420",
                             "client_id":"7ceb9b7fda4a9061ec1c",
                             "client_secret":"3416238e1edf915eac08b8fe345b2b95cdba7e04"
+                        },
+                        "proxy-rewrite": {
+                            "uri": "/echo"
                         }
                     },
                     "upstream": {
                         "type": "roundrobin",
                         "nodes": {
-                        "httpbin.org:80": 1
+                            "test.com:1980": 1
                         }
                     }
                 }]]
diff --git a/t/plugin/jwt-auth3.t b/t/plugin/jwt-auth3.t
index 7daf6cf164a3..3ab089a974c6 100755
--- a/t/plugin/jwt-auth3.t
+++ b/t/plugin/jwt-auth3.t
@@ -280,11 +280,11 @@ hello: world
                     },
                     "upstream": {
                         "nodes": {
-                            "httpbin.org:80": 1
+                            "test.com:1980": 1
                         },
                         "type": "roundrobin"
                     },
-                    "uri": "/get"
+                    "uri": "/hello"
                 }]]
                 )
 
@@ -299,11 +299,11 @@ hello: world
 
 === TEST 12: verify (in cookie) with hiding credentials
 --- request
-GET /get
+GET /hello
 --- more_headers
 Cookie: hello=world; jwt-cookie=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJrZXkiOiJ1c2VyLWtleSIsImV4cCI6MTg3OTMxODU0MX0.fNtFJnNmJgzbiYmGB0Yjvm-l6A6M4jRV1l4mnVFSYjs; foo=bar
---- response_body eval
-qr/hello=world; foo=bar/
+--- response_body
+hello world
 
 
 
diff --git a/t/plugin/proxy-mirror.t b/t/plugin/proxy-mirror.t
index 9c58f4bac98e..031737d50a13 100644
--- a/t/plugin/proxy-mirror.t
+++ b/t/plugin/proxy-mirror.t
@@ -705,8 +705,8 @@ passed
                     [[{
                         "plugins": {
                             "proxy-mirror": {
-                               "host": "http://httpbin.org",
-                               "path": "/get"
+                               "host": "http://test.com:1980",
+                               "path": "/hello"
                             }
                         },
                         "upstream": {
@@ -736,7 +736,7 @@ GET /hello
 --- response_body
 hello world
 --- error_log_like eval
-qr/http:\/\/httpbin\.org is resolved to: http:\/\/((2(5[0-5]|[0-4]\d))|[0-1]?\d{1,2})(\.((2(5[0-5]|[0-4]\d))|[0-1]?\d{1,2})){3}/
+qr/http:\/\/test\.com is resolved to: http:\/\/((2(5[0-5]|[0-4]\d))|[0-1]?\d{1,2})(\.((2(5[0-5]|[0-4]\d))|[0-1]?\d{1,2})){3}/