diff --git a/components/script/dom/create.rs b/components/script/dom/create.rs
index 9b226c73e33..55bef524640 100644
--- a/components/script/dom/create.rs
+++ b/components/script/dom/create.rs
@@ -116,9 +116,13 @@ pub fn create_element(name: QualName, prefix: Option<Atom>,
         atom!("base")       => make!(HTMLBaseElement),
         atom!("bdi")        => make!(HTMLElement),
         atom!("bdo")        => make!(HTMLElement),
-        atom!("bgsound")    => make!(HTMLElement),
+        // https://html.spec.whatwg.org/multipage/#other-elements,-attributes-and-apis:bgsound
+        atom!("bgsound")    => make!(HTMLUnknownElement),
         atom!("big")        => make!(HTMLElement),
-        atom!("blockquote") => make!(HTMLElement),
+        // https://html.spec.whatwg.org/multipage/#other-elements,-attributes-and-apis:blink
+        atom!("blink")      => make!(HTMLUnknownElement),
+        // https://html.spec.whatwg.org/multipage/#the-blockquote-element
+        atom!("blockquote") => make!(HTMLQuoteElement),
         atom!("body")       => make!(HTMLBodyElement),
         atom!("br")         => make!(HTMLBRElement),
         atom!("button")     => make!(HTMLButtonElement),
@@ -166,7 +170,8 @@ pub fn create_element(name: QualName, prefix: Option<Atom>,
         atom!("img")        => make!(HTMLImageElement),
         atom!("input")      => make!(HTMLInputElement),
         atom!("ins")        => make!(HTMLModElement),
-        atom!("isindex")    => make!(HTMLElement),
+        // https://html.spec.whatwg.org/multipage/#other-elements,-attributes-and-apis:isindex-2
+        atom!("isindex")    => make!(HTMLUnknownElement),
         atom!("kbd")        => make!(HTMLElement),
         atom!("label")      => make!(HTMLLabelElement),
         atom!("legend")     => make!(HTMLLegendElement),
@@ -178,7 +183,11 @@ pub fn create_element(name: QualName, prefix: Option<Atom>,
         atom!("marquee")    => make!(HTMLElement),
         atom!("meta")       => make!(HTMLMetaElement),
         atom!("meter")      => make!(HTMLMeterElement),
+        // https://html.spec.whatwg.org/multipage/#other-elements,-attributes-and-apis:multicol
+        atom!("multicol")   => make!(HTMLUnknownElement),
         atom!("nav")        => make!(HTMLElement),
+        // https://html.spec.whatwg.org/multipage/#other-elements,-attributes-and-apis:nextid
+        atom!("nextid")     => make!(HTMLUnknownElement),
         atom!("nobr")       => make!(HTMLElement),
         atom!("noframes")   => make!(HTMLElement),
         atom!("noscript")   => make!(HTMLElement),
@@ -202,7 +211,8 @@ pub fn create_element(name: QualName, prefix: Option<Atom>,
         atom!("select")     => make!(HTMLSelectElement),
         atom!("small")      => make!(HTMLElement),
         atom!("source")     => make!(HTMLSourceElement),
-        atom!("spacer")     => make!(HTMLElement),
+        // https://html.spec.whatwg.org/multipage/#other-elements,-attributes-and-apis:spacer
+        atom!("spacer")     => make!(HTMLUnknownElement),
         atom!("span")       => make!(HTMLSpanElement),
         atom!("strike")     => make!(HTMLElement),
         atom!("strong")     => make!(HTMLElement),
diff --git a/components/servo/Cargo.lock b/components/servo/Cargo.lock
index b5cd385b3fe..796ebb85c31 100644
--- a/components/servo/Cargo.lock
+++ b/components/servo/Cargo.lock
@@ -608,7 +608,7 @@ dependencies = [
  "simd 0.1.0 (git+https://github.com/huonw/simd)",
  "skia 0.0.20130412 (git+https://github.com/servo/skia)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -795,8 +795,8 @@ dependencies = [
  "phf_codegen 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "rc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "tendril 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -944,8 +944,8 @@ dependencies = [
  "serde_json 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "unicode-bidi 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1430,8 +1430,8 @@ dependencies = [
  "selectors 0.1.0 (git+https://github.com/servo/rust-selectors)",
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "tendril 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1478,8 +1478,8 @@ dependencies = [
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "quickersort 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1581,33 +1581,33 @@ dependencies = [
 
 [[package]]
 name = "string_cache"
-version = "0.1.11"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_shared 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_shared 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "string_cache_plugin"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "mac 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_shared 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_shared 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "string_cache_shared"
-version = "0.1.5"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "debug_unreachable 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf_codegen 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf_generator 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf_shared 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1629,8 +1629,8 @@ dependencies = [
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style_traits 0.0.1",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
@@ -1643,8 +1643,8 @@ dependencies = [
  "cssparser 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "euclid 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "selectors 0.1.0 (git+https://github.com/servo/rust-selectors)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "style_traits 0.0.1",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1797,7 +1797,7 @@ dependencies = [
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
diff --git a/ports/cef/Cargo.lock b/ports/cef/Cargo.lock
index aa505aca001..deabeebe15f 100644
--- a/ports/cef/Cargo.lock
+++ b/ports/cef/Cargo.lock
@@ -566,7 +566,7 @@ dependencies = [
  "simd 0.1.0 (git+https://github.com/huonw/simd)",
  "skia 0.0.20130412 (git+https://github.com/servo/skia)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -746,8 +746,8 @@ dependencies = [
  "phf_codegen 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "rc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "tendril 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -895,8 +895,8 @@ dependencies = [
  "serde_json 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "unicode-bidi 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1364,8 +1364,8 @@ dependencies = [
  "selectors 0.1.0 (git+https://github.com/servo/rust-selectors)",
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "tendril 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1404,8 +1404,8 @@ dependencies = [
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "quickersort 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1540,33 +1540,33 @@ dependencies = [
 
 [[package]]
 name = "string_cache"
-version = "0.1.11"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_shared 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_shared 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "string_cache_plugin"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "mac 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_shared 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_shared 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "string_cache_shared"
-version = "0.1.5"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "debug_unreachable 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf_codegen 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf_generator 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf_shared 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1588,8 +1588,8 @@ dependencies = [
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style_traits 0.0.1",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
@@ -1741,7 +1741,7 @@ dependencies = [
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
diff --git a/ports/gonk/Cargo.lock b/ports/gonk/Cargo.lock
index 9dc67f0f337..bc3956480fc 100644
--- a/ports/gonk/Cargo.lock
+++ b/ports/gonk/Cargo.lock
@@ -513,7 +513,7 @@ dependencies = [
  "simd 0.1.0 (git+https://github.com/huonw/simd)",
  "skia 0.0.20130412 (git+https://github.com/servo/skia)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -630,8 +630,8 @@ dependencies = [
  "phf_codegen 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "rc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "tendril 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -779,8 +779,8 @@ dependencies = [
  "serde_json 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "unicode-bidi 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1230,8 +1230,8 @@ dependencies = [
  "selectors 0.1.0 (git+https://github.com/servo/rust-selectors)",
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style 0.0.1",
  "tendril 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.32 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1270,8 +1270,8 @@ dependencies = [
  "matches 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "quickersort 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1386,33 +1386,33 @@ dependencies = [
 
 [[package]]
 name = "string_cache"
-version = "0.1.11"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_shared 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_shared 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "string_cache_plugin"
-version = "0.1.6"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "mac 0.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_shared 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_shared 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "string_cache_shared"
-version = "0.1.5"
+version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "debug_unreachable 0.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf_codegen 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf_generator 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf_shared 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1434,8 +1434,8 @@ dependencies = [
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache_plugin 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache_plugin 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "style_traits 0.0.1",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "util 0.0.1",
@@ -1576,7 +1576,7 @@ dependencies = [
  "serde 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_macros 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "string_cache 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "string_cache 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 0.2.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
diff --git a/tests/wpt/metadata/html/dom/interfaces.html.ini b/tests/wpt/metadata/html/dom/interfaces.html.ini
index d8df33b0711..41ab3d979c1 100644
--- a/tests/wpt/metadata/html/dom/interfaces.html.ini
+++ b/tests/wpt/metadata/html/dom/interfaces.html.ini
@@ -2109,24 +2109,6 @@
   [HTMLUnknownElement interface: existence and properties of interface object]
     expected: FAIL
 
-  [HTMLUnknownElement must be primary interface of document.createElement("bgsound")]
-    expected: FAIL
-
-  [Stringification of document.createElement("bgsound")]
-    expected: FAIL
-
-  [HTMLUnknownElement must be primary interface of document.createElement("isindex")]
-    expected: FAIL
-
-  [Stringification of document.createElement("isindex")]
-    expected: FAIL
-
-  [HTMLUnknownElement must be primary interface of document.createElement("spacer")]
-    expected: FAIL
-
-  [Stringification of document.createElement("spacer")]
-    expected: FAIL
-
   [HTMLHtmlElement interface: existence and properties of interface object]
     expected: FAIL
 
@@ -2445,12 +2427,6 @@
   [HTMLQuoteElement interface: attribute cite]
     expected: FAIL
 
-  [HTMLQuoteElement must be primary interface of document.createElement("blockquote")]
-    expected: FAIL
-
-  [Stringification of document.createElement("blockquote")]
-    expected: FAIL
-
   [HTMLQuoteElement interface: document.createElement("blockquote") must inherit property "cite" with the proper type (0)]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/semantics/interfaces.html.ini b/tests/wpt/metadata/html/semantics/interfaces.html.ini
index 61048ef3c0e..45a48c4a42e 100644
--- a/tests/wpt/metadata/html/semantics/interfaces.html.ini
+++ b/tests/wpt/metadata/html/semantics/interfaces.html.ini
@@ -1,14 +1,5 @@
 [interfaces.html]
   type: testharness
-  [Interfaces for bgsound]
-    expected: FAIL
-
-  [Interfaces for blockquote]
-    expected: FAIL
-
-  [Interfaces for isindex]
-    expected: FAIL
-
   [Interfaces for keygen]
     expected: FAIL
 
@@ -27,9 +18,6 @@
   [Interfaces for plaintext]
     expected: FAIL
 
-  [Interfaces for spacer]
-    expected: FAIL
-
   [Interfaces for tfoot]
     expected: FAIL
 
@@ -45,15 +33,6 @@
   [Interfaces for command]
     expected: FAIL
 
-  [Interfaces for BGSOUND]
-    expected: FAIL
-
-  [Interfaces for BLOCKQUOTE]
-    expected: FAIL
-
-  [Interfaces for ISINDEX]
-    expected: FAIL
-
   [Interfaces for KEYGEN]
     expected: FAIL
 
@@ -72,9 +51,6 @@
   [Interfaces for PLAINTEXT]
     expected: FAIL
 
-  [Interfaces for SPACER]
-    expected: FAIL
-
   [Interfaces for TFOOT]
     expected: FAIL
 
diff --git a/tests/wpt/web-platform-tests/html/dom/interfaces.html b/tests/wpt/web-platform-tests/html/dom/interfaces.html
index 29d059bdc1e..14db51c3918 100644
--- a/tests/wpt/web-platform-tests/html/dom/interfaces.html
+++ b/tests/wpt/web-platform-tests/html/dom/interfaces.html
@@ -3222,6 +3222,7 @@ window.onload = function() {
       'document.createElement("acronym")',
     ],
     HTMLUnknownElement: [
+      'document.createElement("blink")',
       'document.createElement("quasit")',
       'document.createElement("bgsound")',
       'document.createElement("isindex")',