diff --git a/url/setters_tests.json b/url/setters_tests.json
index 62ed3a5c372b99e..55bbc430257e0f6 100644
--- a/url/setters_tests.json
+++ b/url/setters_tests.json
@@ -102,7 +102,7 @@
             }
         },
         {
-            "comment": "Can’t switch from special scheme to non-special. Note: this may change, see https://github.com/whatwg/url/issues/104",
+            "comment": "Can’t switch from special scheme to non-special",
             "href": "http://example.net",
             "new_value": "b",
             "expected": {
@@ -110,6 +110,22 @@
                 "protocol": "http:"
             }
         },
+        {
+            "href": "https://example.net",
+            "new_value": "s",
+            "expected": {
+                "href": "https://example.net/",
+                "protocol": "https:"
+            }
+        },
+        {
+            "href": "ftp://example.net",
+            "new_value": "test",
+            "expected": {
+                "href": "ftp://example.net/",
+                "protocol": "ftp:"
+            }
+        },
         {
             "comment": "Cannot-be-a-base URL doesn’t have a host, but URL in a special scheme must.",
             "href": "mailto:me@example.net",
@@ -120,7 +136,7 @@
             }
         },
         {
-            "comment": "Can’t switch from non-special scheme to special. Note: this may change, see https://github.com/whatwg/url/issues/104",
+            "comment": "Can’t switch from non-special scheme to special",
             "href": "ssh://me@example.net",
             "new_value": "http",
             "expected": {
@@ -128,6 +144,30 @@
                 "protocol": "ssh:"
             }
         },
+        {
+            "href": "ssh://me@example.net",
+            "new_value": "gopher",
+            "expected": {
+                "href": "ssh://me@example.net/",
+                "protocol": "ssh:"
+            }
+        },
+        {
+            "href": "ssh://me@example.net",
+            "new_value": "file",
+            "expected": {
+                "href": "ssh://me@example.net/",
+                "protocol": "ssh:"
+            }
+        },
+        {
+            "href": "nonsense:///test",
+            "new_value": "https",
+            "expected": {
+                "href": "nonsense:///test",
+                "protocol": "nonsense:"
+            }
+        },
         {
             "comment": "Stuff after the first ':' is ignored",
             "href": "http://example.net",