diff --git a/tests/wpt/web-platform-tests/websockets/constructor/002.html b/tests/wpt/web-platform-tests/websockets/constructor/002.html
index 956cb1e9248..1acc2dbb82e 100644
--- a/tests/wpt/web-platform-tests/websockets/constructor/002.html
+++ b/tests/wpt/web-platform-tests/websockets/constructor/002.html
@@ -11,8 +11,8 @@ test(function() {assert_throws("SyntaxError", function(){new WebSocket("wss://fo
 test(function() {assert_throws("SyntaxError", function(){new WebSocket("http://"+location.host+"/")})});
 test(function() {assert_throws("SyntaxError", function(){new WebSocket("mailto:example@example.org")})});
 test(function() {assert_throws("SyntaxError", function(){new WebSocket("about:blank")})});
-test(function() {assert_throws("SyntaxError", function(){new WebSocket("ws://"+location.host+"/#")})});
-test(function() {assert_throws("SyntaxError", function(){new WebSocket("ws://"+location.host+"/#test")})});
+test(function() {assert_throws("SyntaxError", function(){new WebSocket(SCHEME_DOMAIN_PORT+"/#")})});
+test(function() {assert_throws("SyntaxError", function(){new WebSocket(SCHEME_DOMAIN_PORT+"/#test")})});
 test(function() {assert_throws("SyntaxError", function(){new WebSocket("?test")})});
 test(function() {assert_throws("SyntaxError", function(){new WebSocket("#test")})});
 </script>
diff --git a/tests/wpt/web-platform-tests/websockets/constructor/004.html b/tests/wpt/web-platform-tests/websockets/constructor/004.html
index a58fb3720ac..042caa1e589 100644
--- a/tests/wpt/web-platform-tests/websockets/constructor/004.html
+++ b/tests/wpt/web-platform-tests/websockets/constructor/004.html
@@ -6,18 +6,28 @@
 <div id=log></div>
 <script>
 // empty string
-test(function() {assert_throws("SyntaxError", function(){new WebSocket("ws://"+location.host+"/", "")})});
+test(function() {
+  assert_throws("SyntaxError", function() {
+    new WebSocket(SCHEME_DOMAIN_PORT + '/empty-message', "")
+  })
+});
 
 // chars below U+0020 except U+0000; U+0000 is tested in a separate test
 for (var i = 1; i < 0x20; ++i) {
-test(function() {
-  assert_throws("SyntaxError", function(){new WebSocket("ws://"+location.host+"/", "a"+String.fromCharCode(i)+"b")}, 'char code '+i);
-})
+  test(function() {
+    assert_throws("SyntaxError", function() {
+      new WebSocket(SCHEME_DOMAIN_PORT + '/empty-message',
+                    "a"+String.fromCharCode(i)+"b")
+    }, 'char code '+i);
+  })
 }
 // some chars above U+007E
 for (var i = 0x7F; i < 0x100; ++i) {
-test(function() {
-  assert_throws("SyntaxError", function(){new WebSocket("ws://"+location.host+"/", "a"+String.fromCharCode(i)+"b")}, 'char code '+i);
-})
+  test(function() {
+    assert_throws("SyntaxError", function() {
+      new WebSocket(SCHEME_DOMAIN_PORT + '/empty-message',
+                    "a"+String.fromCharCode(i)+"b")
+    }, 'char code '+i);
+  })
 }
 </script>
diff --git a/tests/wpt/web-platform-tests/websockets/constructor/005.html b/tests/wpt/web-platform-tests/websockets/constructor/005.html
index bb4d6d0f29a..58878b8a5fb 100644
--- a/tests/wpt/web-platform-tests/websockets/constructor/005.html
+++ b/tests/wpt/web-platform-tests/websockets/constructor/005.html
@@ -6,6 +6,6 @@
 <div id=log></div>
 <script>
 test(function() {
-  assert_true(new WebSocket("ws://"+location.host+"/") instanceof WebSocket);
+  assert_true(new WebSocket(SCHEME_DOMAIN_PORT + '/empty-message') instanceof WebSocket);
 });
 </script>
diff --git a/tests/wpt/web-platform-tests/websockets/constructor/007.html b/tests/wpt/web-platform-tests/websockets/constructor/007.html
index a3985cdcc6b..9fcb07dc4d3 100644
--- a/tests/wpt/web-platform-tests/websockets/constructor/007.html
+++ b/tests/wpt/web-platform-tests/websockets/constructor/007.html
@@ -5,5 +5,10 @@
 <script src=../constants.js?pipe=sub></script>
 <div id=log></div>
 <script>
-test(function() {assert_throws("SyntaxError", function(){new WebSocket("ws://"+location.host+"/", 'a'+String.fromCharCode(0)+'b')})});
+test(function() {
+  assert_throws("SyntaxError", function() {
+    new WebSocket(SCHEME_DOMAIN_PORT + '/empty-message',
+                  'a' + String.fromCharCode(0) + 'b')
+  })
+});
 </script>