diff --git a/servo/components/servo/Cargo.toml b/servo/components/servo/Cargo.toml
index 680f9fba409c..e4f64ed88d6b 100644
--- a/servo/components/servo/Cargo.toml
+++ b/servo/components/servo/Cargo.toml
@@ -16,7 +16,6 @@ default = ["webdriver", "max_log_level"]
 max_log_level = ["log/release_max_level_info"]
 webdriver = ["webdriver_server"]
 energy-profiling = ["profile_traits/energy-profiling"]
-testing = ["style/testing"]
 debugmozjs = ["script/debugmozjs"]
 
 [dependencies]
diff --git a/servo/components/style/Cargo.toml b/servo/components/style/Cargo.toml
index 616553a0d3d1..e1e2a008eed8 100644
--- a/servo/components/style/Cargo.toml
+++ b/servo/components/style/Cargo.toml
@@ -26,7 +26,6 @@ servo = ["serde", "heapsize", "heapsize_derive",
          #"arrayvec/use_union"
 
          "servo_url"]
-testing = []
 gecko_debug = ["nsstring_vendor/gecko_debug"]
 
 [dependencies]
diff --git a/servo/components/style/build.rs b/servo/components/style/build.rs
index 29ef8d93daa0..9a3d0169c24f 100644
--- a/servo/components/style/build.rs
+++ b/servo/components/style/build.rs
@@ -75,7 +75,6 @@ fn generate_properties() {
         .arg(&script)
         .arg(product)
         .arg("style-crate")
-        .arg(if cfg!(feature = "testing") { "testing" } else { "regular" })
         .status()
         .unwrap();
     if !status.success() {
diff --git a/servo/components/style/properties/build.py b/servo/components/style/properties/build.py
index c12793e4ac9a..f9da76153a47 100644
--- a/servo/components/style/properties/build.py
+++ b/servo/components/style/properties/build.py
@@ -21,17 +21,16 @@ RE_PYTHON_ADDR = re.compile(r'<.+? object at 0x[0-9a-fA-F]+>')
 
 
 def main():
-    usage = "Usage: %s [ servo | gecko ] [ style-crate | html ] [ testing | regular ]" % sys.argv[0]
-    if len(sys.argv) < 4:
+    usage = "Usage: %s [ servo | gecko ] [ style-crate | html ]" % sys.argv[0]
+    if len(sys.argv) < 3:
         abort(usage)
     product = sys.argv[1]
     output = sys.argv[2]
-    testing = sys.argv[3] == "testing"
 
     if product not in ["servo", "gecko"] or output not in ["style-crate", "geckolib", "html"]:
         abort(usage)
 
-    properties = data.PropertiesData(product=product, testing=testing)
+    properties = data.PropertiesData(product=product)
     template = os.path.join(BASE, "properties.mako.rs")
     rust = render(template, product=product, data=properties, __file__=template)
     if output == "style-crate":
diff --git a/servo/components/style/properties/data.py b/servo/components/style/properties/data.py
index 7e08b079ad87..fd4b83ffc730 100644
--- a/servo/components/style/properties/data.py
+++ b/servo/components/style/properties/data.py
@@ -304,18 +304,8 @@ class StyleStruct(object):
 
 
 class PropertiesData(object):
-    """
-        The `testing` parameter means that we're running tests.
-
-        In this situation, the `product` value is ignored while choosing
-        which shorthands and longhands to generate; and instead all properties for
-        which code exists for either servo or stylo are generated. Note that we skip
-        this behavior when the style crate is being built in gecko mode, because we
-        need manual glue for such properties and we don't have it.
-    """
-    def __init__(self, product, testing):
+    def __init__(self, product):
         self.product = product
-        self.testing = testing and product != "gecko"
         self.style_structs = []
         self.current_style_struct = None
         self.longhands = []
@@ -338,9 +328,9 @@ class PropertiesData(object):
             for prefix in property.extra_prefixes:
                 property.alias.append('-%s-%s' % (prefix, property.name))
 
-    def declare_longhand(self, name, products="gecko servo", disable_when_testing=False, **kwargs):
+    def declare_longhand(self, name, products="gecko servo", **kwargs):
         products = products.split()
-        if self.product not in products and not (self.testing and not disable_when_testing):
+        if self.product not in products:
             return
 
         longhand = Longhand(self.current_style_struct, name, **kwargs)
@@ -354,10 +344,9 @@ class PropertiesData(object):
 
         return longhand
 
-    def declare_shorthand(self, name, sub_properties, products="gecko servo",
-                          disable_when_testing=False, *args, **kwargs):
+    def declare_shorthand(self, name, sub_properties, products="gecko servo", *args, **kwargs):
         products = products.split()
-        if self.product not in products and not (self.testing and not disable_when_testing):
+        if self.product not in products:
             return
 
         sub_properties = [self.longhands_by_name[s] for s in sub_properties]
diff --git a/servo/components/style/properties/helpers/animated_properties.mako.rs b/servo/components/style/properties/helpers/animated_properties.mako.rs
index 222027044c3a..8dbb8a268d4b 100644
--- a/servo/components/style/properties/helpers/animated_properties.mako.rs
+++ b/servo/components/style/properties/helpers/animated_properties.mako.rs
@@ -34,7 +34,7 @@ use std::cmp;
 #[cfg(feature = "gecko")] use fnv::FnvHashMap;
 use style_traits::ParseError;
 use super::ComputedValues;
-#[cfg(any(feature = "gecko", feature = "testing"))]
+#[cfg(feature = "gecko")]
 use values::Auto;
 use values::{CSSFloat, CustomIdent, Either};
 use values::animated::{ToAnimatedValue, ToAnimatedZero};
diff --git a/servo/components/style/properties/longhand/box.mako.rs b/servo/components/style/properties/longhand/box.mako.rs
index 7bdb7c1c1c56..b96e12fdc0e5 100644
--- a/servo/components/style/properties/longhand/box.mako.rs
+++ b/servo/components/style/properties/longhand/box.mako.rs
@@ -711,7 +711,6 @@ ${helpers.predefined_type("animation-delay",
         "computed::ScrollSnapPoint::none()",
         animation_value_type="discrete",
         products="gecko",
-        disable_when_testing=True,
         spec="Nonstandard (https://www.w3.org/TR/2015/WD-css-snappoints-1-20150326/#scroll-snap-points)",
     )}
 % endfor
@@ -1832,8 +1831,7 @@ ${helpers.predefined_type("-moz-binding", "UrlOrNone", "Either::Second(None_)",
                           boxed="True" if product == "gecko" else "False",
                           animation_value_type="none",
                           gecko_ffi_name="mBinding",
-                          spec="Nonstandard (https://developer.mozilla.org/en-US/docs/Web/CSS/-moz-binding)",
-                          disable_when_testing="True")}
+                          spec="Nonstandard (https://developer.mozilla.org/en-US/docs/Web/CSS/-moz-binding)")}
 
 ${helpers.single_keyword("-moz-orient",
                           "inline block horizontal vertical",
@@ -1915,7 +1913,6 @@ ${helpers.predefined_type("shape-outside", "basic_shape::FloatAreaShape",
 <%helpers:longhand name="touch-action"
                    products="gecko"
                    animation_value_type="discrete"
-                   disable_when_testing="True"
                    spec="https://compat.spec.whatwg.org/#touch-action">
     use gecko_bindings::structs;
     use std::fmt;
diff --git a/servo/components/style/properties/longhand/font.mako.rs b/servo/components/style/properties/longhand/font.mako.rs
index e31d459cee2f..8d8fcf017ec0 100644
--- a/servo/components/style/properties/longhand/font.mako.rs
+++ b/servo/components/style/properties/longhand/font.mako.rs
@@ -1507,7 +1507,7 @@ ${helpers.single_keyword_system("font-kerning",
     }
 </%helpers:longhand>
 
-#[cfg(any(feature = "gecko", feature = "testing"))]
+#[cfg(feature = "gecko")]
 macro_rules! exclusive_value {
     (($value:ident, $set:expr) => $ident:ident) => {
         if $value.intersects($set) {
@@ -2256,7 +2256,7 @@ https://drafts.csswg.org/css-fonts-4/#low-level-font-variation-settings-control-
 <%helpers:longhand name="-moz-script-size-multiplier" products="gecko" animation_value_type="none"
                    predefined_type="Number" gecko_ffi_name="mScriptSizeMultiplier"
                    spec="Internal (not web-exposed)"
-                   internal="True" disable_when_testing="True">
+                   internal="True">
     use values::computed::ComputedValueAsSpecified;
     pub use self::computed_value::T as SpecifiedValue;
 
@@ -2281,7 +2281,7 @@ https://drafts.csswg.org/css-fonts-4/#low-level-font-variation-settings-control-
 <%helpers:longhand name="-moz-script-level" products="gecko" animation_value_type="none"
                    predefined_type="Integer" gecko_ffi_name="mScriptLevel"
                    spec="Internal (not web-exposed)"
-                   internal="True" disable_when_testing="True" need_clone="True">
+                   internal="True" need_clone="True">
     use std::fmt;
     use style_traits::ToCss;
 
@@ -2380,7 +2380,7 @@ ${helpers.single_keyword("-moz-math-variant",
 <%helpers:longhand name="-moz-script-min-size" products="gecko" animation_value_type="none"
                    predefined_type="Length" gecko_ffi_name="mScriptMinSize"
                    spec="Internal (not web-exposed)"
-                   internal="True" disable_when_testing="True">
+                   internal="True">
     use app_units::Au;
     use gecko_bindings::structs::NS_MATHML_DEFAULT_SCRIPT_MIN_SIZE_PT;
     use values::specified::length::{AU_PER_PT, FontBaseSize, NoCalcLength};
diff --git a/servo/components/style/properties/longhand/position.mako.rs b/servo/components/style/properties/longhand/position.mako.rs
index 2ea32e99845c..e0f34ed0d731 100644
--- a/servo/components/style/properties/longhand/position.mako.rs
+++ b/servo/components/style/properties/longhand/position.mako.rs
@@ -416,7 +416,6 @@ ${helpers.predefined_type("object-position",
         spec="https://drafts.csswg.org/css-grid/#propdef-grid-template-areas"
         products="gecko"
         animation_value_type="discrete"
-        disable_when_testing="True"
         boxed="True">
     use std::collections::HashMap;
     use std::fmt;
diff --git a/servo/components/style/properties/shorthand/font.mako.rs b/servo/components/style/properties/shorthand/font.mako.rs
index 52070f19afda..0bd11277e74c 100644
--- a/servo/components/style/properties/shorthand/font.mako.rs
+++ b/servo/components/style/properties/shorthand/font.mako.rs
@@ -8,15 +8,15 @@
 <%helpers:shorthand name="font"
                     sub_properties="font-style font-variant-caps font-weight font-stretch
                                     font-size line-height font-family
-                                    ${'font-size-adjust' if product == 'gecko' or data.testing else ''}
-                                    ${'font-kerning' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-alternates' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-east-asian' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-ligatures' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-numeric' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-position' if product == 'gecko' or data.testing else ''}
-                                    ${'font-language-override' if product == 'gecko' or data.testing else ''}
-                                    ${'font-feature-settings' if product == 'gecko' or data.testing else ''}"
+                                    ${'font-size-adjust' if product == 'gecko' else ''}
+                                    ${'font-kerning' if product == 'gecko' else ''}
+                                    ${'font-variant-alternates' if product == 'gecko' else ''}
+                                    ${'font-variant-east-asian' if product == 'gecko' else ''}
+                                    ${'font-variant-ligatures' if product == 'gecko' else ''}
+                                    ${'font-variant-numeric' if product == 'gecko' else ''}
+                                    ${'font-variant-position' if product == 'gecko' else ''}
+                                    ${'font-language-override' if product == 'gecko' else ''}
+                                    ${'font-feature-settings' if product == 'gecko' else ''}"
                     spec="https://drafts.csswg.org/css-fonts-3/#propdef-font">
     use parser::Parse;
     use properties::longhands::{font_family, font_style, font_weight, font_stretch};
@@ -31,7 +31,7 @@
                                 variant_ligatures variant_numeric \
                                 variant_position feature_settings".split()
     %>
-    % if product == "gecko" or data.testing:
+    % if product == "gecko":
         % for prop in gecko_sub_properties:
             use properties::longhands::font_${prop};
         % endfor
@@ -112,7 +112,7 @@
             % endfor
             line_height: line_height.unwrap_or(LineHeight::normal()),
             font_family: family,
-            % if product == "gecko" or data.testing:
+            % if product == "gecko":
                 % for name in gecko_sub_properties:
                     font_${name}: font_${name}::get_initial_specified_value(),
                 % endfor
@@ -146,7 +146,7 @@
                 }
             % endif
 
-            % if product == "gecko" or data.testing:
+            % if product == "gecko":
                 % for name in gecko_sub_properties:
                     if self.font_${name} != &font_${name}::get_initial_specified_value() {
                         return Ok(());
@@ -226,16 +226,16 @@
 
 <%helpers:shorthand name="font-variant"
                     sub_properties="font-variant-caps
-                                    ${'font-variant-alternates' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-east-asian' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-ligatures' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-numeric' if product == 'gecko' or data.testing else ''}
-                                    ${'font-variant-position' if product == 'gecko' or data.testing else ''}"
+                                    ${'font-variant-alternates' if product == 'gecko' else ''}
+                                    ${'font-variant-east-asian' if product == 'gecko' else ''}
+                                    ${'font-variant-ligatures' if product == 'gecko' else ''}
+                                    ${'font-variant-numeric' if product == 'gecko' else ''}
+                                    ${'font-variant-position' if product == 'gecko' else ''}"
                     spec="https://drafts.csswg.org/css-fonts-3/#propdef-font-variant">
     <% gecko_sub_properties = "alternates east_asian ligatures numeric position".split() %>
     <%
         sub_properties = ["caps"]
-        if product == "gecko" or data.testing:
+        if product == "gecko":
             sub_properties += gecko_sub_properties
     %>
 
@@ -254,7 +254,7 @@
         } else if input.try(|input| input.expect_ident_matching("none")).is_ok() {
             // The 'none' value sets 'font-variant-ligatures' to 'none' and resets all other sub properties
             // to their initial value.
-        % if product == "gecko" or data.testing:
+        % if product == "gecko":
             ligatures = Some(font_variant_ligatures::get_none_specified_value());
         % endif
         } else {
@@ -294,7 +294,7 @@
         fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
 
             let has_none_ligatures =
-            % if product == "gecko" or data.testing:
+            % if product == "gecko":
                 self.font_variant_ligatures == &font_variant_ligatures::get_none_specified_value();
             % else:
                 false;
diff --git a/servo/components/style/properties/shorthand/position.mako.rs b/servo/components/style/properties/shorthand/position.mako.rs
index f4221eae3122..e0b2b8f75071 100644
--- a/servo/components/style/properties/shorthand/position.mako.rs
+++ b/servo/components/style/properties/shorthand/position.mako.rs
@@ -239,7 +239,6 @@
 <%helpers:shorthand name="grid-template"
                     sub_properties="grid-template-rows grid-template-columns grid-template-areas"
                     spec="https://drafts.csswg.org/css-grid/#propdef-grid-template"
-                    disable_when_testing="True"
                     products="gecko">
     use parser::Parse;
     use properties::longhands::grid_template_areas::TemplateAreas;
@@ -452,7 +451,6 @@
                                     grid-auto-rows grid-auto-columns grid-row-gap grid-column-gap
                                     grid-auto-flow"
                     spec="https://drafts.csswg.org/css-grid/#propdef-grid"
-                    disable_when_testing="True"
                     products="gecko">
     use parser::Parse;
     use properties::longhands::{grid_auto_columns, grid_auto_rows, grid_auto_flow};
@@ -612,7 +610,7 @@
 
 <%helpers:shorthand name="place-content" sub_properties="align-content justify-content"
                     spec="https://drafts.csswg.org/css-align/#propdef-place-content"
-                    products="gecko" disable_when_testing="True">
+                    products="gecko">
     use properties::longhands::align_content;
     use properties::longhands::justify_content;
 
@@ -648,7 +646,7 @@
 
 <%helpers:shorthand name="place-self" sub_properties="align-self justify-self"
                     spec="https://drafts.csswg.org/css-align/#place-self-property"
-                    products="gecko" disable_when_testing="True">
+                    products="gecko">
     use values::specified::align::AlignJustifySelf;
     use parser::Parse;
 
@@ -684,7 +682,7 @@
 
 <%helpers:shorthand name="place-items" sub_properties="align-items justify-items"
                     spec="https://drafts.csswg.org/css-align/#place-items-property"
-                    products="gecko" disable_when_testing="True">
+                    products="gecko">
     use values::specified::align::{AlignItems, JustifyItems};
     use parser::Parse;
 
diff --git a/servo/components/style/properties/shorthand/text.mako.rs b/servo/components/style/properties/shorthand/text.mako.rs
index f8edac923fb1..bd119f7cd8af 100644
--- a/servo/components/style/properties/shorthand/text.mako.rs
+++ b/servo/components/style/properties/shorthand/text.mako.rs
@@ -6,10 +6,10 @@
 
 <%helpers:shorthand name="text-decoration"
                     sub_properties="text-decoration-line
-                    ${' text-decoration-style text-decoration-color' if product == 'gecko' or data.testing else ''}"
+                    ${' text-decoration-style text-decoration-color' if product == 'gecko' else ''}"
                     spec="https://drafts.csswg.org/css-text-decor/#propdef-text-decoration">
 
-    % if product == "gecko" or data.testing:
+    % if product == "gecko":
         use values::specified;
         use properties::longhands::{text_decoration_line, text_decoration_style, text_decoration_color};
     % else:
@@ -18,7 +18,7 @@
 
     pub fn parse_value<'i, 't>(context: &ParserContext, input: &mut Parser<'i, 't>)
                                -> Result<Longhands, ParseError<'i>> {
-        % if product == "gecko" or data.testing:
+        % if product == "gecko":
             let (mut line, mut style, mut color, mut any) = (None, None, None, false);
         % else:
             let (mut line, mut any) = (None, false);
@@ -39,7 +39,7 @@
 
             parse_component!(line, text_decoration_line);
 
-            % if product == "gecko" or data.testing:
+            % if product == "gecko":
                 parse_component!(style, text_decoration_style);
                 parse_component!(color, text_decoration_color);
             % endif
@@ -54,7 +54,7 @@
         Ok(expanded! {
             text_decoration_line: unwrap_or_initial!(text_decoration_line, line),
 
-            % if product == "gecko" or data.testing:
+            % if product == "gecko":
                 text_decoration_style: unwrap_or_initial!(text_decoration_style, style),
                 text_decoration_color: unwrap_or_initial!(text_decoration_color, color),
             % endif
@@ -65,7 +65,7 @@
         fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
             self.text_decoration_line.to_css(dest)?;
 
-            % if product == "gecko" or data.testing:
+            % if product == "gecko":
                 if self.text_decoration_style != &text_decoration_style::SpecifiedValue::solid {
                     dest.write_str(" ")?;
                     self.text_decoration_style.to_css(dest)?;
diff --git a/servo/components/style/rule_tree/mod.rs b/servo/components/style/rule_tree/mod.rs
index 1063cdba6c96..bcfe15604578 100644
--- a/servo/components/style/rule_tree/mod.rs
+++ b/servo/components/style/rule_tree/mod.rs
@@ -953,11 +953,10 @@ impl StrongRuleNode {
         // That's... suspicious, but it's fine if it happens for the rule tree
         // case, so just don't crash in the case we're doing the final GC in
         // script.
-        if !cfg!(feature = "testing") {
-            debug_assert!(!thread_state::get().is_worker() &&
-                          (thread_state::get().is_layout() ||
-                           thread_state::get().is_script()));
-        }
+
+        debug_assert!(!thread_state::get().is_worker() &&
+                      (thread_state::get().is_layout() ||
+                       thread_state::get().is_script()));
 
         let current = me.next_free.load(Ordering::Relaxed);
         if current == FREE_LIST_SENTINEL {
diff --git a/servo/components/style/stylesheets/rule_parser.rs b/servo/components/style/stylesheets/rule_parser.rs
index e96c85c74a96..198b0bdac9a9 100644
--- a/servo/components/style/stylesheets/rule_parser.rs
+++ b/servo/components/style/stylesheets/rule_parser.rs
@@ -359,7 +359,7 @@ impl<'a, 'b, 'i> AtRuleParser<'i> for NestedRuleParser<'a, 'b> {
                 Ok(AtRuleType::WithBlock(AtRulePrelude::FontFace(location)))
             },
             "font-feature-values" => {
-                if !cfg!(feature = "gecko") && !cfg!(feature = "testing") {
+                if !cfg!(feature = "gecko") {
                     // Support for this rule is not fully implemented in Servo yet.
                     return Err(StyleParseError::UnsupportedAtRule(name.clone()).into())
                 }
diff --git a/servo/ports/geckolib/Cargo.toml b/servo/ports/geckolib/Cargo.toml
index 181dffac3a8c..f3975297f78d 100644
--- a/servo/ports/geckolib/Cargo.toml
+++ b/servo/ports/geckolib/Cargo.toml
@@ -11,7 +11,6 @@ crate-type = ["staticlib", "rlib"]
 
 [features]
 bindgen = ["style/use_bindgen"]
-testing = ["style/testing"]
 gecko_debug = ["style/gecko_debug"]
 
 [dependencies]
diff --git a/servo/ports/servo/Cargo.toml b/servo/ports/servo/Cargo.toml
index d8a2e609adf7..b0dd093876f8 100644
--- a/servo/ports/servo/Cargo.toml
+++ b/servo/ports/servo/Cargo.toml
@@ -32,7 +32,6 @@ default = ["webdriver", "max_log_level"]
 max_log_level = ["log/release_max_level_info"]
 webdriver = ["libservo/webdriver_server"]
 energy-profiling = ["libservo/energy-profiling"]
-testing = ["libservo/testing"]
 debugmozjs = ["libservo/debugmozjs"]
 
 [dependencies]
diff --git a/servo/python/servo/testing_commands.py b/servo/python/servo/testing_commands.py
index 2d4df90755bb..8f17aa149b9c 100644
--- a/servo/python/servo/testing_commands.py
+++ b/servo/python/servo/testing_commands.py
@@ -257,12 +257,6 @@ class MachCommands(CommandBase):
 
         packages.discard('stylo')
 
-        has_style = True
-        try:
-            packages.remove('style')
-        except KeyError:
-            has_style = False
-
         env = self.build_env()
         env["RUST_BACKTRACE"] = "1"
 
@@ -290,20 +284,6 @@ class MachCommands(CommandBase):
             if err is not 0:
                 return err
 
-        # Run style tests with the testing feature
-        if has_style:
-            args = ["cargo", "bench" if bench else "test", "-p", "style_tests", "--features"]
-            if features:
-                args += ["%s" % ' '.join(features + ["testing"])]
-            else:
-                args += ["testing"]
-
-            args += test_patterns
-
-            if nocapture:
-                args += ["--", "--nocapture"]
-            return call(args, env=env, cwd=self.servo_crate())
-
     @Command('test-stylo',
              description='Run stylo unit tests',
              category='testing')
@@ -319,7 +299,7 @@ class MachCommands(CommandBase):
         env["RUST_BACKTRACE"] = "1"
         env["CARGO_TARGET_DIR"] = path.join(self.context.topdir, "target", "geckolib").encode("UTF-8")
 
-        args = (["cargo", "test", "-p", "stylo_tests", "--features", "testing"] +
+        args = (["cargo", "test", "-p", "stylo_tests"] +
                 (["--release"] if release else []) + (test_name or []))
         with cd(path.join("ports", "geckolib")):
             return call(args, env=env)
diff --git a/servo/tests/unit/style/lib.rs b/servo/tests/unit/style/lib.rs
index 572a608d212d..f1774fe1a094 100644
--- a/servo/tests/unit/style/lib.rs
+++ b/servo/tests/unit/style/lib.rs
@@ -6,7 +6,6 @@
 #![feature(plugin, test)]
 
 extern crate app_units;
-extern crate byteorder;
 extern crate cssparser;
 extern crate euclid;
 #[macro_use] extern crate html5ever;
diff --git a/servo/tests/unit/style/parsing/basic_shape.rs b/servo/tests/unit/style/parsing/basic_shape.rs
deleted file mode 100644
index e0afdbb001b9..000000000000
--- a/servo/tests/unit/style/parsing/basic_shape.rs
+++ /dev/null
@@ -1,108 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use parsing::parse;
-use style::parser::Parse;
-use style::values::specified::basic_shape::*;
-use style_traits::ToCss;
-
-// Ensure that basic-shape sub-functions parse as both basic shapes
-// and their individual components
-macro_rules! assert_roundtrip_basicshape {
-    ($fun:expr, $input:expr, $output:expr) => {
-        assert_roundtrip_with_context!($fun, $input, $output);
-        assert_roundtrip_with_context!(BasicShape::parse, $input, $output);
-    };
-    ($fun:expr, $input:expr) => {
-        assert_roundtrip_basicshape!($fun, $input, $input);
-    };
-}
-
-#[test]
-fn test_inset() {
-    assert_roundtrip_basicshape!(InsetRect::parse, "inset(10px)");
-    assert_roundtrip_basicshape!(InsetRect::parse, "inset(10px 20%)");
-
-    assert_roundtrip_basicshape!(InsetRect::parse, "inset(10px round 10px)");
-    assert_roundtrip_basicshape!(InsetRect::parse, "inset(10px round 10px 20px 30px 40px)");
-    assert_roundtrip_basicshape!(InsetRect::parse, "inset(10px round 10px 20px 30px 40px / 1px 2px 3px 4px)");
-}
-
-#[test]
-fn test_circle() {
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at center)", "circle(at 50% 50%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle()", "circle(at 50% 50%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at left bottom)", "circle(at 0% 100%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at bottom left)", "circle(at 0% 100%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at top left)", "circle(at 0% 0%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at center left)", "circle(at 0% 50%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at left center)", "circle(at 0% 50%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at top center)", "circle(at 50% 0%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at center top)", "circle(at 50% 0%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at 40% top)", "circle(at 40% 0%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at 10px 100px)", "circle(at 10px 100px)");
-    // closest-side is omitted, because it is the default
-    assert_roundtrip_basicshape!(Circle::parse, "circle(closest-side at center)", "circle(at 50% 50%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(farthest-side at center)",
-                                                "circle(farthest-side at 50% 50%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(10px)",
-                                                "circle(10px at 50% 50%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(20px at center)", "circle(20px at 50% 50%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(calc(1px + 50%) at center)",
-                                                "circle(calc(1px + 50%) at 50% 50%)");
-
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at right 5px bottom 10px)",
-                                                "circle(at right 5px bottom 10px)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at bottom 5px right 10px)",
-                                                "circle(at right 10px bottom 5px)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at right 5% top 0px)",
-                                                "circle(at 95% 0%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at right 5% bottom 0px)",
-                                                "circle(at 95% 100%)");
-    assert_roundtrip_basicshape!(Circle::parse, "circle(at right 5% bottom 1px)",
-                                                "circle(at left 95% bottom 1px)");
-
-    assert!(parse(Circle::parse, "circle(at 5% bottom 1px)").is_err());
-    assert!(parse(Circle::parse, "circle(at top 40%)").is_err());
-    assert!(parse(Circle::parse, "circle(-10px)").is_err());
-}
-
-#[test]
-fn test_ellipse() {
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse(at center)", "ellipse(at 50% 50%)");
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse()", "ellipse(at 50% 50%)");
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse(at left bottom)", "ellipse(at 0% 100%)");
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse(at bottom left)", "ellipse(at 0% 100%)");
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse(at 10px 100px)", "ellipse(at 10px 100px)");
-    // closest-side is omitted, because it is the default
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse(closest-side closest-side at center)",
-                                                 "ellipse(at 50% 50%)");
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse(farthest-side closest-side at center)",
-                                                 "ellipse(farthest-side closest-side at 50% 50%)");
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse(20px 10% at center)", "ellipse(20px 10% at 50% 50%)");
-    assert_roundtrip_basicshape!(Ellipse::parse, "ellipse(calc(1px + 50%) 10px at center)",
-                                                 "ellipse(calc(1px + 50%) 10px at 50% 50%)");
-}
-
-#[test]
-fn test_polygon() {
-    // surprisingly, polygons are only required to have at least one vertex,
-    // not at least 3
-    assert_roundtrip_basicshape!(Polygon::parse, "polygon(10px 10px)", "polygon(10px 10px)");
-    assert_roundtrip_basicshape!(Polygon::parse, "polygon(10px 10px, 10px 10px)", "polygon(10px 10px, 10px 10px)");
-    assert_roundtrip_basicshape!(Polygon::parse, "polygon(nonzero, 10px 10px, 10px 10px)",
-                                                 "polygon(10px 10px, 10px 10px)");
-    assert_roundtrip_basicshape!(Polygon::parse, "polygon(evenodd, 10px 10px, 10px 10px)",
-                                                 "polygon(evenodd, 10px 10px, 10px 10px)");
-    assert_roundtrip_basicshape!(Polygon::parse, "polygon(evenodd, 10px 10px, 10px calc(10px + 50%))",
-                                                 "polygon(evenodd, 10px 10px, 10px calc(10px + 50%))");
-    assert_roundtrip_basicshape!(Polygon::parse, "polygon(evenodd, 10px 10px, 10px 10px, 10px 10px, 10px 10px, 10px \
-                                                  10px, 10px 10px, 10px 10px, 10px 10px, 10px 10px, 10px 10px, \
-                                                  10px 10px, 10px 10px, 10px 10px)",
-                                                 "polygon(evenodd, 10px 10px, 10px 10px, 10px 10px, 10px 10px, 10px \
-                                                  10px, 10px 10px, 10px 10px, 10px 10px, 10px 10px, 10px 10px, \
-                                                  10px 10px, 10px 10px, 10px 10px)");
-
-    assert!(parse(Polygon::parse, "polygon()").is_err());
-}
diff --git a/servo/tests/unit/style/parsing/box_.rs b/servo/tests/unit/style/parsing/box_.rs
index 6d3778942fa8..3e7637232007 100644
--- a/servo/tests/unit/style/parsing/box_.rs
+++ b/servo/tests/unit/style/parsing/box_.rs
@@ -5,24 +5,6 @@
 use parsing::parse;
 use style_traits::ToCss;
 
-#[test]
-fn test_will_change() {
-    use style::properties::longhands::will_change;
-
-    assert_roundtrip_with_context!(will_change::parse, "auto");
-    assert_roundtrip_with_context!(will_change::parse, "scroll-position");
-    assert_roundtrip_with_context!(will_change::parse, "contents");
-    assert_roundtrip_with_context!(will_change::parse, "transition");
-    assert_roundtrip_with_context!(will_change::parse, "opacity, transform");
-
-    assert!(parse(will_change::parse, "will-change").is_err());
-    assert!(parse(will_change::parse, "all").is_err());
-    assert!(parse(will_change::parse, "none").is_err());
-    assert!(parse(will_change::parse, "contents, auto").is_err());
-    assert!(parse(will_change::parse, "contents, inherit, initial").is_err());
-    assert!(parse(will_change::parse, "transform scroll-position").is_err());
-}
-
 #[test]
 fn test_transform_translate() {
     use style::properties::longhands::transform;
diff --git a/servo/tests/unit/style/parsing/containment.rs b/servo/tests/unit/style/parsing/containment.rs
deleted file mode 100644
index dbd02fd70675..000000000000
--- a/servo/tests/unit/style/parsing/containment.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use parsing::parse;
-use style_traits::ToCss;
-
-#[test]
-fn contain_longhand_should_parse_correctly() {
-    use style::properties::longhands::contain;
-    use style::properties::longhands::contain::SpecifiedValue;
-
-    let none = parse_longhand!(contain, "none");
-    assert_eq!(none, SpecifiedValue::empty());
-
-    let strict = parse_longhand!(contain, "strict");
-    assert_eq!(strict, contain::STRICT | contain::STRICT_BITS);
-
-    let style_paint = parse_longhand!(contain, "style paint");
-    assert_eq!(style_paint, contain::STYLE | contain::PAINT);
-
-    assert_roundtrip_with_context!(contain::parse, "strict");
-    assert_roundtrip_with_context!(contain::parse, "layout style paint");
-
-    // Assert that the `2px` is not consumed, which would trigger parsing failure in real use
-    assert_parser_exhausted!(contain::parse, "layout 2px", false);
-}
diff --git a/servo/tests/unit/style/parsing/font.rs b/servo/tests/unit/style/parsing/font.rs
index e092fd88989a..b111ceae8bc1 100644
--- a/servo/tests/unit/style/parsing/font.rs
+++ b/servo/tests/unit/style/parsing/font.rs
@@ -3,95 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use parsing::parse;
-use style::properties::longhands::{font_feature_settings, font_weight};
-use style::properties::longhands::font_feature_settings::SpecifiedValue;
-use style::values::generics::{FontSettings, FontSettingTag, FontSettingTagInt};
-use style_traits::ToCss;
-
-#[test]
-fn font_feature_settings_should_parse_properly() {
-    use byteorder::{ReadBytesExt, BigEndian};
-    use std::io::Cursor;
-
-    let normal = parse_longhand!(font_feature_settings, "normal");
-    let normal_computed = SpecifiedValue::Value(FontSettings::Normal);
-    assert_eq!(normal, normal_computed);
-
-    let mut a_d_bytes = Cursor::new(b"abcd");
-    let mut e_h_bytes = Cursor::new(b"efgh");
-
-    let abcd = a_d_bytes.read_u32::<BigEndian>().unwrap();
-    let efgh = e_h_bytes.read_u32::<BigEndian>().unwrap();
-
-    let on = parse_longhand!(font_feature_settings, "\"abcd\" on");
-    let on_computed = SpecifiedValue::Value(FontSettings::Tag(vec![
-        FontSettingTag { tag: abcd, value: FontSettingTagInt(1) }
-    ]));
-    assert_eq!(on, on_computed);
-
-    let off = parse_longhand!(font_feature_settings, "\"abcd\" off");
-    let off_computed = SpecifiedValue::Value(FontSettings::Tag(vec![
-        FontSettingTag { tag: abcd, value: FontSettingTagInt(0) }
-    ]));
-    assert_eq!(off, off_computed);
-
-    let no_value = parse_longhand!(font_feature_settings, "\"abcd\"");
-    let no_value_computed = SpecifiedValue::Value(FontSettings::Tag(vec![
-        FontSettingTag { tag: abcd, value: FontSettingTagInt(1) }
-    ]));
-    assert_eq!(no_value, no_value_computed);
-
-    let pos_integer = parse_longhand!(font_feature_settings, "\"abcd\" 100");
-    let pos_integer_computed = SpecifiedValue::Value(FontSettings::Tag(vec![
-        FontSettingTag { tag: abcd, value: FontSettingTagInt(100) }
-    ]));
-    assert_eq!(pos_integer, pos_integer_computed);
-
-    let multiple = parse_longhand!(font_feature_settings, "\"abcd\" off, \"efgh\"");
-    let multiple_computed = SpecifiedValue::Value(FontSettings::Tag(vec![
-        FontSettingTag { tag: abcd, value: FontSettingTagInt(0) },
-        FontSettingTag { tag: efgh, value: FontSettingTagInt(1) }
-    ]));
-    assert_eq!(multiple, multiple_computed);
-}
-
-#[test]
-fn font_feature_settings_should_throw_on_bad_input() {
-    assert!(parse(font_feature_settings::parse, "").is_err());
-    assert!(parse(font_feature_settings::parse, "\"abcd\" -1").is_err());
-    assert!(parse(font_feature_settings::parse, "\"abc\"").is_err());
-    assert!(parse(font_feature_settings::parse, "\"abcó\"").is_err());
-}
-
-#[test]
-fn font_feature_settings_to_css() {
-    assert_roundtrip_with_context!(font_feature_settings::parse, "normal");
-    assert_roundtrip_with_context!(font_feature_settings::parse, "\"abcd\"");
-    assert_roundtrip_with_context!(font_feature_settings::parse, "\"abcd\" on", "\"abcd\"");
-    assert_roundtrip_with_context!(font_feature_settings::parse, "\"abcd\" off");
-    assert_roundtrip_with_context!(font_feature_settings::parse, "\"abcd\" 4");
-    assert_roundtrip_with_context!(font_feature_settings::parse, "\"abcd\", \"efgh\"");
-}
-
-#[test]
-fn font_language_override_should_parse_properly() {
-    use style::properties::longhands::font_language_override::{self, SpecifiedValue};
-
-    let normal = parse_longhand!(font_language_override, "normal");
-    assert_eq!(normal, SpecifiedValue::Normal);
-
-    let empty_str = parse_longhand!(font_language_override, "\"\"");
-    assert_eq!(empty_str, SpecifiedValue::Override("".to_string()));
-
-    let normal_str = parse_longhand!(font_language_override, "\"normal\"");
-    assert_eq!(normal_str, SpecifiedValue::Override("normal".to_string()));
-
-    let turkic = parse_longhand!(font_language_override, "\"TRK\"");
-    assert_eq!(turkic, SpecifiedValue::Override("TRK".to_string()));
-
-    let danish = parse_longhand!(font_language_override, "\"DAN\"");
-    assert_eq!(danish, SpecifiedValue::Override("DAN".to_string()));
-}
+use style::properties::longhands::font_weight;
 
 #[test]
 fn font_weight_keyword_should_preserve_keyword() {
@@ -103,11 +15,3 @@ fn font_weight_keyword_should_preserve_keyword() {
     let result = parse(font_weight::parse, "bold").unwrap();
     assert_eq!(result, SpecifiedValue::Bold);
 }
-
-#[test]
-#[should_panic]
-fn font_language_override_should_fail_on_empty_str() {
-    use style::properties::longhands::font_language_override;
-
-    parse_longhand!(font_language_override, "");
-}
diff --git a/servo/tests/unit/style/parsing/inherited_box.rs b/servo/tests/unit/style/parsing/inherited_box.rs
deleted file mode 100644
index f9c3066eb38d..000000000000
--- a/servo/tests/unit/style/parsing/inherited_box.rs
+++ /dev/null
@@ -1,27 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use parsing::parse;
-
-#[test]
-fn image_orientation_longhand_should_parse_properly() {
-    use style::properties::longhands::image_orientation;
-    use style::properties::longhands::image_orientation::SpecifiedValue;
-    use style::values::specified::Angle;
-
-    let from_image = parse_longhand!(image_orientation, "from-image");
-    assert_eq!(from_image, SpecifiedValue { angle: None, flipped: false });
-
-    let flip = parse_longhand!(image_orientation, "flip");
-    assert_eq!(flip, SpecifiedValue { angle: Some(Angle::zero()), flipped: true });
-
-    let zero = parse_longhand!(image_orientation, "0deg");
-    assert_eq!(zero, SpecifiedValue { angle: Some(Angle::zero()), flipped: false });
-
-    let negative_rad = parse_longhand!(image_orientation, "-1rad");
-    assert_eq!(negative_rad, SpecifiedValue { angle: Some(Angle::from_radians(-1.0, false)), flipped: false });
-
-    let flip_with_180 = parse_longhand!(image_orientation, "180deg flip");
-    assert_eq!(flip_with_180, SpecifiedValue { angle: Some(Angle::from_degrees(180.0, false)), flipped: true });
-}
diff --git a/servo/tests/unit/style/parsing/inherited_text.rs b/servo/tests/unit/style/parsing/inherited_text.rs
index 5c578def6607..85b99a85fc70 100644
--- a/servo/tests/unit/style/parsing/inherited_text.rs
+++ b/servo/tests/unit/style/parsing/inherited_text.rs
@@ -27,94 +27,6 @@ fn negative_word_spacing_should_parse_properly() {
     assert_eq!(negative_value, expected);
 }
 
-#[test]
-fn text_emphasis_style_longhand_should_parse_properly() {
-    use style::properties::longhands::text_emphasis_style;
-    use style::properties::longhands::text_emphasis_style::{ShapeKeyword, SpecifiedValue, KeywordValue};
-
-    let none = parse_longhand!(text_emphasis_style, "none");
-    assert_eq!(none, SpecifiedValue::None);
-
-    let fill = parse_longhand!(text_emphasis_style, "open");
-    let fill_struct = SpecifiedValue::Keyword(KeywordValue::Fill(false));
-    assert_eq!(fill, fill_struct);
-
-    let shape = parse_longhand!(text_emphasis_style, "triangle");
-    let shape_struct = SpecifiedValue::Keyword(KeywordValue::Shape(ShapeKeyword::Triangle));
-    assert_eq!(shape, shape_struct);
-
-    let fill_shape = parse_longhand!(text_emphasis_style, "filled dot");
-    let fill_shape_struct = SpecifiedValue::Keyword(KeywordValue::FillAndShape(true, ShapeKeyword::Dot));
-    assert_eq!(fill_shape, fill_shape_struct);
-
-    let shape_fill = parse_longhand!(text_emphasis_style, "dot filled");
-    let shape_fill_struct = SpecifiedValue::Keyword(KeywordValue::FillAndShape(true, ShapeKeyword::Dot));
-    assert_eq!(shape_fill, shape_fill_struct);
-
-    let a_string = parse_longhand!(text_emphasis_style, "\"a\"");
-    let a_string_struct = SpecifiedValue::String("a".to_string());
-    assert_eq!(a_string, a_string_struct);
-
-    let chinese_string = parse_longhand!(text_emphasis_style, "\"点\"");
-    let chinese_string_struct = SpecifiedValue::String("点".to_string());
-    assert_eq!(chinese_string, chinese_string_struct);
-
-    let unicode_string = parse_longhand!(text_emphasis_style, "\"\\25B2\"");
-    let unicode_string_struct = SpecifiedValue::String("▲".to_string());
-    assert_eq!(unicode_string, unicode_string_struct);
-
-    let devanagari_string = parse_longhand!(text_emphasis_style, "\"षि\"");
-    let devanagari_string_struct = SpecifiedValue::String("षि".to_string());
-    assert_eq!(devanagari_string, devanagari_string_struct);
-}
-
-#[test]
-fn test_text_emphasis_position() {
-    use style::properties::longhands::text_emphasis_position;
-    use style::properties::longhands::text_emphasis_position::{HorizontalWritingModeValue, VerticalWritingModeValue};
-    use style::properties::longhands::text_emphasis_position::SpecifiedValue;
-
-    let over_right = parse_longhand!(text_emphasis_position, "over right");
-    assert_eq!(over_right, SpecifiedValue(HorizontalWritingModeValue::Over, VerticalWritingModeValue::Right));
-
-    let over_left = parse_longhand!(text_emphasis_position, "over left");
-    assert_eq!(over_left, SpecifiedValue(HorizontalWritingModeValue::Over, VerticalWritingModeValue::Left));
-
-    let under_right = parse_longhand!(text_emphasis_position, "under right");
-    assert_eq!(under_right, SpecifiedValue(HorizontalWritingModeValue::Under, VerticalWritingModeValue::Right));
-
-    let under_left = parse_longhand!(text_emphasis_position, "under left");
-    assert_eq!(under_left, SpecifiedValue(HorizontalWritingModeValue::Under, VerticalWritingModeValue::Left));
-
-    let right_over = parse_longhand!(text_emphasis_position, "right over");
-    assert_eq!(right_over, SpecifiedValue(HorizontalWritingModeValue::Over, VerticalWritingModeValue::Right));
-
-    let left_over = parse_longhand!(text_emphasis_position, "left over");
-    assert_eq!(left_over, SpecifiedValue(HorizontalWritingModeValue::Over, VerticalWritingModeValue::Left));
-
-    let right_under = parse_longhand!(text_emphasis_position, "right under");
-    assert_eq!(right_under, SpecifiedValue(HorizontalWritingModeValue::Under, VerticalWritingModeValue::Right));
-
-    let left_under = parse_longhand!(text_emphasis_position, "left under");
-    assert_eq!(left_under, SpecifiedValue(HorizontalWritingModeValue::Under, VerticalWritingModeValue::Left));
-}
-
-#[test]
-fn webkit_text_stroke_shorthand_should_parse_properly() {
-    use style::properties::longhands::_webkit_text_stroke_color;
-    use style::properties::longhands::_webkit_text_stroke_width;
-    use style::properties::shorthands::_webkit_text_stroke;
-
-    let result = parse(_webkit_text_stroke::parse_value, "thin red").unwrap();
-    assert_eq!(result._webkit_text_stroke_color, parse_longhand!(_webkit_text_stroke_color, "red"));
-    assert_eq!(result._webkit_text_stroke_width, parse_longhand!(_webkit_text_stroke_width, "thin"));
-
-    // ensure its no longer sensitive to order
-    let result = parse(_webkit_text_stroke::parse_value, "red thin").unwrap();
-    assert_eq!(result._webkit_text_stroke_color, parse_longhand!(_webkit_text_stroke_color, "red"));
-    assert_eq!(result._webkit_text_stroke_width, parse_longhand!(_webkit_text_stroke_width, "thin"));
-}
-
 #[test]
 fn line_height_should_return_number_on_plain_zero() {
     use style::properties::longhands::line_height;
diff --git a/servo/tests/unit/style/parsing/mask.rs b/servo/tests/unit/style/parsing/mask.rs
deleted file mode 100644
index c027e9610839..000000000000
--- a/servo/tests/unit/style/parsing/mask.rs
+++ /dev/null
@@ -1,145 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use parsing::parse;
-use style::properties::longhands::{mask_clip, mask_composite, mask_image, mask_mode};
-use style::properties::longhands::{mask_origin, mask_position_x, mask_position_y, mask_repeat, mask_size};
-use style::properties::shorthands::mask;
-
-#[test]
-fn mask_shorthand_should_parse_all_available_properties_when_specified() {
-    let input = "url(\"http://servo/test.png\") luminance 7px 4px / 70px 50px repeat-x padding-box border-box subtract";
-    let result = parse(mask::parse_value, input).unwrap();
-
-    assert_eq!(result.mask_image, parse_longhand!(mask_image, "url(\"http://servo/test.png\")"));
-    assert_eq!(result.mask_mode, parse_longhand!(mask_mode, "luminance"));
-    assert_eq!(result.mask_position_x, parse_longhand!(mask_position_x, "7px"));
-    assert_eq!(result.mask_position_y, parse_longhand!(mask_position_y, "4px"));
-    assert_eq!(result.mask_size, parse_longhand!(mask_size, "70px 50px"));
-    assert_eq!(result.mask_repeat, parse_longhand!(mask_repeat, "repeat-x"));
-    assert_eq!(result.mask_origin, parse_longhand!(mask_origin, "padding-box"));
-    assert_eq!(result.mask_clip, parse_longhand!(mask_clip, "border-box"));
-    assert_eq!(result.mask_composite, parse_longhand!(mask_composite, "subtract"));
-}
-
-#[test]
-fn mask_shorthand_should_parse_when_some_fields_set() {
-    let result = parse(mask::parse_value, "14px 40px repeat-y").unwrap();
-
-    assert_eq!(result.mask_position_x, parse_longhand!(mask_position_x, "14px"));
-    assert_eq!(result.mask_position_y, parse_longhand!(mask_position_y, "40px"));
-    assert_eq!(result.mask_repeat, parse_longhand!(mask_repeat, "repeat-y"));
-
-    let result = parse(mask::parse_value, "url(\"http://servo/test.png\") repeat add").unwrap();
-
-    assert_eq!(result.mask_image, parse_longhand!(mask_image, "url(\"http://servo/test.png\")"));
-    assert_eq!(result.mask_repeat, parse_longhand!(mask_repeat, "repeat"));
-    assert_eq!(result.mask_composite, parse_longhand!(mask_composite, "add"));
-
-    let result = parse(mask::parse_value, "intersect").unwrap();
-
-    assert_eq!(result.mask_composite, parse_longhand!(mask_composite, "intersect"));
-
-    let result = parse(mask::parse_value, "url(\"http://servo/test.png\")").unwrap();
-
-    assert_eq!(result.mask_image, parse_longhand!(mask_image, "url(\"http://servo/test.png\")"));
-}
-
-#[test]
-fn mask_shorthand_should_parse_position_and_size_correctly() {
-    let result = parse(mask::parse_value, "7px 4px").unwrap();
-
-    assert_eq!(result.mask_position_x, parse_longhand!(mask_position_x, "7px"));
-    assert_eq!(result.mask_position_y, parse_longhand!(mask_position_y, "4px"));
-
-    let result = parse(mask::parse_value, "7px 4px / 30px 20px").unwrap();
-
-    assert_eq!(result.mask_position_x, parse_longhand!(mask_position_x, "7px"));
-    assert_eq!(result.mask_position_y, parse_longhand!(mask_position_y, "4px"));
-    assert_eq!(result.mask_size, parse_longhand!(mask_size, "30px 20px"));
-
-    assert!(parse(mask::parse_value, "/ 30px 20px").is_err());
-
-    assert!(parse(mask::parse_value, "match-source repeat-x / 30px 20px").is_err());
-}
-
-#[test]
-fn mask_shorthand_should_parse_origin_and_clip_correctly() {
-    let result = parse(mask::parse_value, "padding-box content-box").unwrap();
-
-    assert_eq!(result.mask_origin, parse_longhand!(mask_origin, "padding-box"));
-    assert_eq!(result.mask_clip, parse_longhand!(mask_clip, "content-box"));
-
-    let result = parse(mask::parse_value, "padding-box padding-box").unwrap();
-
-    assert_eq!(result.mask_origin, parse_longhand!(mask_origin, "padding-box"));
-    assert_eq!(result.mask_clip, parse_longhand!(mask_clip, "padding-box"));
-
-    let result = parse(mask::parse_value, "padding-box").unwrap();
-
-    assert_eq!(result.mask_origin, parse_longhand!(mask_origin, "padding-box"));
-    assert_eq!(result.mask_clip, parse_longhand!(mask_clip, "padding-box"));
-}
-
-#[test]
-fn mask_shorthand_should_parse_mode_everywhere() {
-    assert!(parse(mask::parse_value, "luminance 7px 4px repeat-x padding-box").is_ok());
-    assert!(parse(mask::parse_value, "alpha").is_ok());
-}
-
-#[test]
-fn mask_repeat_should_parse_shorthand_correctly() {
-    use style::properties::longhands::mask_repeat::single_value::{RepeatKeyword, SpecifiedValue};
-
-    let repeat_x = parse_longhand!(mask_repeat, "repeat-x");
-    assert_eq!(repeat_x, mask_repeat::SpecifiedValue(vec![SpecifiedValue::RepeatX]));
-
-    let repeat_y = parse_longhand!(mask_repeat, "repeat-y");
-    assert_eq!(repeat_y, mask_repeat::SpecifiedValue(vec![SpecifiedValue::RepeatY]));
-
-    let repeat = parse_longhand!(mask_repeat, "repeat");
-    assert_eq!(repeat,
-               mask_repeat::SpecifiedValue(vec![SpecifiedValue::Other(RepeatKeyword::Repeat, None)]));
-
-    let space = parse_longhand!(mask_repeat, "space");
-    assert_eq!(space,
-               mask_repeat::SpecifiedValue(vec![SpecifiedValue::Other(RepeatKeyword::Space, None)]));
-
-    let round = parse_longhand!(mask_repeat, "round");
-    assert_eq!(round,
-               mask_repeat::SpecifiedValue(vec![SpecifiedValue::Other(RepeatKeyword::Round, None)]));
-
-    let no_repeat = parse_longhand!(mask_repeat, "no-repeat");
-    assert_eq!(no_repeat,
-               mask_repeat::SpecifiedValue(vec![SpecifiedValue::Other(RepeatKeyword::NoRepeat, None)]));
-}
-
-#[test]
-fn mask_repeat_should_parse_longhand_correctly() {
-    use style::properties::longhands::mask_repeat::single_value::{RepeatKeyword, SpecifiedValue};
-
-    // repeat-x is not available in longhand form.
-    assert!(parse(mask_repeat::parse, "repeat-x no-repeat").is_err());
-    assert!(parse(mask_repeat::parse, "no-repeat repeat-x").is_err());
-
-    // repeat-y is not available in longhand form.
-    assert!(parse(mask_repeat::parse, "repeat-y no-repeat").is_err());
-    assert!(parse(mask_repeat::parse, "no-repeat repeat-y").is_err());
-
-    // Longhand form supports two directions.
-    let no_repeat_and_round = parse_longhand!(mask_repeat, "no-repeat round");
-    assert_eq!(no_repeat_and_round,
-               mask_repeat::SpecifiedValue(vec![SpecifiedValue::Other(RepeatKeyword::NoRepeat,
-                                                                      Some(RepeatKeyword::Round))]));
-
-    // Not three directions.
-    assert!(parse(mask_repeat::parse, "repeat no-repeat round").is_err());
-
-    // Multiple values with mixed shortform and longform should parse.
-    let multiple = parse_longhand!(mask_repeat, "repeat, no-repeat round");
-    assert_eq!(multiple,
-               mask_repeat::SpecifiedValue(vec![SpecifiedValue::Other(RepeatKeyword::Repeat, None),
-                                                SpecifiedValue::Other(RepeatKeyword::NoRepeat,
-                                                                      Some(RepeatKeyword::Round))]));
-}
diff --git a/servo/tests/unit/style/parsing/mod.rs b/servo/tests/unit/style/parsing/mod.rs
index 5f2a86514d23..0c9e7d10eeb1 100644
--- a/servo/tests/unit/style/parsing/mod.rs
+++ b/servo/tests/unit/style/parsing/mod.rs
@@ -5,17 +5,11 @@
 //! Tests for parsing and serialization of values/properties
 
 use cssparser::{Parser, ParserInput};
-use euclid::ScaleFactor;
-use euclid::TypedSize2D;
 use media_queries::CSSErrorReporterTest;
 use style::context::QuirksMode;
-use style::font_metrics::ServoMetricsProvider;
-use style::media_queries::{Device, MediaType};
 use style::parser::ParserContext;
-use style::properties::{ComputedValues, StyleBuilder};
 use style::stylesheets::{CssRuleType, Origin};
-use style::values::computed::{Context, ToComputedValue};
-use style_traits::{PARSING_MODE_DEFAULT, ToCss, ParseError};
+use style_traits::{PARSING_MODE_DEFAULT, ParseError};
 
 fn parse<T, F>(f: F, s: &'static str) -> Result<T, ParseError<'static>>
 where F: for<'t> Fn(&ParserContext, &mut Parser<'static, 't>) -> Result<T, ParseError<'static>> {
@@ -45,30 +39,6 @@ where F: Fn(&ParserContext, &mut Parser<'i, 't>) -> Result<T, ParseError<'i>> {
     parse_input(|context, parser| parser.parse_entirely(|p| f(context, p)), input)
 }
 
-fn assert_computed_serialization<C, F, T>(f: F, input: &'static str, output: &str)
-    where F: for<'t> Fn(&ParserContext, &mut Parser<'static, 't>) -> Result<T, ParseError<'static>>,
-          T: ToComputedValue<ComputedValue=C>, C: ToCss
-{
-    let viewport_size = TypedSize2D::new(0., 0.);
-    let initial_style = ComputedValues::initial_values();
-    let device = Device::new(MediaType::Screen, viewport_size, ScaleFactor::new(1.0));
-
-    let context = Context {
-        is_root_element: true,
-        builder: StyleBuilder::for_derived_style(&device, initial_style, None, None),
-        cached_system_font: None,
-        font_metrics_provider: &ServoMetricsProvider,
-        in_media_query: false,
-        quirks_mode: QuirksMode::NoQuirks,
-        for_smil_animation: false,
-    };
-
-    let parsed = parse(f, input).unwrap();
-    let computed = parsed.to_computed_value(&context);
-    let serialized = ToCss::to_css_string(&computed);
-    assert_eq!(serialized, output);
-}
-
 // This is a macro so that the file/line information
 // is preserved in the panic
 macro_rules! assert_roundtrip_with_context {
@@ -137,26 +107,20 @@ macro_rules! parse_longhand {
 
 mod animation;
 mod background;
-mod basic_shape;
 mod border;
 mod box_;
 mod column;
-mod containment;
 mod effects;
 mod font;
 mod image;
-mod inherited_box;
 mod inherited_text;
 mod length;
-mod mask;
 mod outline;
 mod position;
 mod selectors;
 mod supports;
-mod text;
 mod text_overflow;
 mod transition_duration;
 mod transition_property;
 mod transition_timing_function;
-mod ui;
 mod value;
diff --git a/servo/tests/unit/style/parsing/position.rs b/servo/tests/unit/style/parsing/position.rs
index 87f11b90cfb4..5494f6c9c12f 100644
--- a/servo/tests/unit/style/parsing/position.rs
+++ b/servo/tests/unit/style/parsing/position.rs
@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-use parsing::{assert_computed_serialization, parse, parse_entirely};
+use parsing::{parse, parse_entirely};
 use style::parser::Parse;
 use style::values::specified::position::*;
 use style_traits::ToCss;
@@ -144,105 +144,3 @@ fn test_vertical_position() {
     assert!(parse(VerticalPosition::parse, "y-end").is_err());
 }
 
-#[test]
-fn test_grid_auto_flow() {
-    use style::properties::longhands::grid_auto_flow;
-
-    assert_roundtrip_with_context!(grid_auto_flow::parse, "row dense", "row dense");
-    assert_roundtrip_with_context!(grid_auto_flow::parse, "dense row", "row dense");
-    assert_roundtrip_with_context!(grid_auto_flow::parse, "column dense", "column dense");
-    assert_roundtrip_with_context!(grid_auto_flow::parse, "dense column", "column dense");
-    assert_roundtrip_with_context!(grid_auto_flow::parse, "dense", "row dense");
-    assert_roundtrip_with_context!(grid_auto_flow::parse, "row", "row");
-    assert_roundtrip_with_context!(grid_auto_flow::parse, "column", "column");
-
-    // Neither row, column or dense can be repeated
-    assert!(parse(grid_auto_flow::parse, "dense dense").is_err());
-    assert!(parse(grid_auto_flow::parse, "row row").is_err());
-    assert!(parse(grid_auto_flow::parse, "column column").is_err());
-    assert!(parse(grid_auto_flow::parse, "row dense dense").is_err());
-    assert!(parse(grid_auto_flow::parse, "column dense dense").is_err());
-
-    // Only row, column, dense idents are allowed
-    assert!(parse(grid_auto_flow::parse, "dense 1").is_err());
-    assert!(parse(grid_auto_flow::parse, "column 'dense'").is_err());
-    assert!(parse(grid_auto_flow::parse, "column 2px dense").is_err());
-}
-
-#[test]
-fn test_grid_auto_rows_columns() {
-    use style::properties::longhands::grid_auto_rows;
-
-    // the grammar is <track-size>+ but gecko supports only a single value, so we've clamped ourselves
-    assert_roundtrip_with_context!(grid_auto_rows::parse, "55%");
-    assert_roundtrip_with_context!(grid_auto_rows::parse, "0.5fr");
-    assert_roundtrip_with_context!(grid_auto_rows::parse, "fit-content(11%)");
-    // only <inflexible-breadth> is allowed in first arg of minmax
-    assert!(parse(grid_auto_rows::parse, "minmax(1fr, max-content)").is_err());
-}
-
-#[test]
-fn test_grid_template_rows_columns() {
-    use style::properties::longhands::grid_template_rows;
-
-    assert_roundtrip_with_context!(grid_template_rows::parse, "none");      // none keyword
-    // <track-size>{2} with `<track-breadth> minmax(<inflexible-breadth>, <track-breadth>)`
-    assert_roundtrip_with_context!(grid_template_rows::parse, "1fr minmax(min-content, 1fr)");
-    // <track-size> with <track-breadth> as <length-percentage>
-    assert_roundtrip_with_context!(grid_template_rows::parse, "calc(4em + 5px)");
-    // <track-size> with <length> followed by <track-repeat> with `<track-size>{3}` (<flex>, auto, minmax)
-    assert_roundtrip_with_context!(grid_template_rows::parse,
-                                   "10px repeat(2, 1fr auto minmax(200px, 1fr))",
-                                   "10px 1fr auto minmax(200px, 1fr) 1fr auto minmax(200px, 1fr)");
-    // <track-repeat> with `<track-size> <line-names>` followed by <track-size>
-    assert_roundtrip_with_context!(grid_template_rows::parse,
-                                   "repeat(2, 10px [col-start] 250px [col-end]) 10px",
-                                   "10px [col-start] 250px [col-end] 10px [col-start] 250px [col-end] 10px");
-    // mixture of <track-size>, <track-repeat> and <line-names>
-    assert_roundtrip_with_context!(grid_template_rows::parse,
-                                   "[a] auto [b] minmax(min-content, 1fr) [b c d] repeat(2, 40px [e] 30px) [i]",
-                                   "[a] auto [b] minmax(min-content, 1fr) [b c d] 40px [e] 30px 40px [e] 30px [i]");
-    assert!(parse(grid_template_rows::parse, "subgrid").is_ok());
-
-    // no span allowed in <line-names>
-    assert!(parse(grid_template_rows::parse, "[a span] 10px").is_err());
-    // <track-list> needs at least one <track-size> | <track-repeat>
-    assert!(parse(grid_template_rows::parse, "[a b c]").is_err());
-    // at least one argument of <fixed-size> should be a <fixed-breadth> (i.e., <length-percentage>)
-    assert!(parse(grid_template_rows::parse, "[a b] repeat(auto-fill, 50px) minmax(auto, 1fr)").is_err());
-    // fit-content is not a <fixed-size>
-    assert!(parse(grid_template_rows::parse, "[a b] repeat(auto-fill, fit-content(20%))").is_err());
-    // <auto-track-list> only allows <fixed-size> | <fixed-repeat>
-    assert!(parse(grid_template_rows::parse, "[a] repeat(2, auto) repeat(auto-fill, 10px)").is_err());
-    // only <inflexible-breadth> allowed in <auto-track-repeat>
-    assert!(parse(grid_template_rows::parse, "[a] repeat(auto-fill, 1fr)").is_err());
-    // <auto-track-repeat> is allowed only once
-    assert!(parse(grid_template_rows::parse, "[a] repeat(auto-fit, [b] 8px) [c] repeat(auto-fill, [c] 8px)").is_err());
-}
-
-#[test]
-fn test_computed_grid_template_rows_colums() {
-    use style::properties::longhands::grid_template_rows;
-
-    assert_computed_serialization(grid_template_rows::parse,
-        "[a] repeat(calc(1 + 1), [b] auto)", "[a b] auto [b] auto");
-
-    assert_computed_serialization(grid_template_rows::parse,
-        "[a] repeat(2, [b c] auto [e] auto [d])",
-        "[a b c] auto [e] auto [d b c] auto [e] auto [d]");
-
-    assert_computed_serialization(grid_template_rows::parse,
-        "[a] 50px [b] 10% [b c d] repeat(2, [e] 40px [f]) [g] repeat(auto-fill, [h i] 20px [j]) [k] 10px [l]",
-        "[a] 50px [b] 10% [b c d e] 40px [f e] 40px [f g] repeat(auto-fill, [h i] 20px [j]) [k] 10px [l]");
-
-    assert_computed_serialization(grid_template_rows::parse,
-        "10px repeat(2, 1fr auto minmax(200px, 1fr))",
-        "10px 1fr auto minmax(200px, 1fr) 1fr auto minmax(200px, 1fr)");
-
-    assert_computed_serialization(grid_template_rows::parse,
-        "subgrid [a] [] repeat(auto-fill, [])", "subgrid [a] [] repeat(auto-fill, [])");
-
-    assert_computed_serialization(grid_template_rows::parse,
-        "subgrid [a] [b] repeat(2, [c d] [] [e]) [] repeat(auto-fill, [])",
-        "subgrid [a] [b] [c d] [] [e] [c d] [] [e] [] repeat(auto-fill, [])");
-}
diff --git a/servo/tests/unit/style/parsing/text.rs b/servo/tests/unit/style/parsing/text.rs
deleted file mode 100644
index 1b1688ad1863..000000000000
--- a/servo/tests/unit/style/parsing/text.rs
+++ /dev/null
@@ -1,22 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use parsing::parse;
-use style_traits::ToCss;
-
-#[test]
-fn initial_letter_should_be_parsed_correctly() {
-    use style::properties::longhands::initial_letter;
-
-    assert_roundtrip_with_context!(initial_letter::parse, "1.5");
-    assert_roundtrip_with_context!(initial_letter::parse, "1.5 3");
-    assert_roundtrip_with_context!(initial_letter::parse, "normal");
-}
-
-#[test]
-fn initial_letter_doesnt_parse_invalid_input() {
-    use style::properties::longhands::initial_letter;
-
-    assert!(parse(initial_letter::parse, "1.5x 5").is_err());
-}
diff --git a/servo/tests/unit/style/parsing/ui.rs b/servo/tests/unit/style/parsing/ui.rs
deleted file mode 100644
index df62a90755b2..000000000000
--- a/servo/tests/unit/style/parsing/ui.rs
+++ /dev/null
@@ -1,49 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use cssparser::RGBA;
-use parsing::parse;
-use style::values::{Auto, Either};
-use style::values::specified::Color;
-use style_traits::ToCss;
-
-#[test]
-fn test_moz_user_select() {
-    use style::properties::longhands::_moz_user_select;
-
-    assert_roundtrip_with_context!(_moz_user_select::parse, "auto");
-    assert_roundtrip_with_context!(_moz_user_select::parse, "text");
-    assert_roundtrip_with_context!(_moz_user_select::parse, "none");
-    assert_roundtrip_with_context!(_moz_user_select::parse, "element");
-    assert_roundtrip_with_context!(_moz_user_select::parse, "elements");
-    assert_roundtrip_with_context!(_moz_user_select::parse, "toggle");
-    assert_roundtrip_with_context!(_moz_user_select::parse, "tri-state");
-    assert_roundtrip_with_context!(_moz_user_select::parse, "-moz-all");
-    assert_roundtrip_with_context!(_moz_user_select::parse, "-moz-text");
-    assert_eq!(parse(_moz_user_select::parse, "-moz-none"),
-               Ok(_moz_user_select::SpecifiedValue::none));
-
-    assert!(parse(_moz_user_select::parse, "potato").is_err());
-}
-
-#[test]
-fn test_caret_color() {
-    use style::properties::longhands::caret_color;
-
-    let auto = parse_longhand!(caret_color, "auto");
-    assert_eq!(auto, Either::Second(Auto));
-
-    let blue_color = Color::Numeric {
-        parsed: RGBA {
-            red: 0,
-            green: 0,
-            blue: 255,
-            alpha: 255,
-        },
-        authored: Some(String::from("blue").into_boxed_str()),
-    };
-
-    let color = parse_longhand!(caret_color, "blue");
-    assert_eq!(color, Either::First(blue_color));
-}
diff --git a/servo/tests/unit/style/properties/serialization.rs b/servo/tests/unit/style/properties/serialization.rs
index 3cf56a1dc7ff..d4af1987f884 100644
--- a/servo/tests/unit/style/properties/serialization.rs
+++ b/servo/tests/unit/style/properties/serialization.rs
@@ -4,14 +4,13 @@
 
 use properties::{parse, parse_input};
 use style::computed_values::display::T::inline_block;
-use style::properties::{PropertyDeclaration, Importance, PropertyId};
+use style::properties::{PropertyDeclaration, Importance};
 use style::properties::parse_property_declaration_list;
 use style::values::{CustomIdent, RGBA, Auto};
 use style::values::generics::flex::FlexBasis;
 use style::values::specified::{BorderStyle, BorderSideWidth, Color};
 use style::values::specified::{Length, LengthOrPercentage, LengthOrPercentageOrAuto};
-use style::values::specified::{NoCalcLength, PositionComponent};
-use style::values::specified::position::Y;
+use style::values::specified::NoCalcLength;
 use style::values::specified::url::SpecifiedUrl;
 use style_traits::ToCss;
 use stylesheets::block_from;
@@ -98,44 +97,6 @@ mod shorthand_serialization {
         }
     }
 
-    mod text {
-        use style::properties::longhands::text_decoration_line as TextDecorationLine;
-        use style::properties::longhands::text_decoration_style::SpecifiedValue as TextDecorationStyle;
-        use super::*;
-
-        #[test]
-        fn text_decoration_should_show_all_properties_when_set() {
-            let mut properties = Vec::new();
-
-            let line = TextDecorationLine::OVERLINE;
-            let style = TextDecorationStyle::dotted;
-            let color = RGBA::new(128, 0, 128, 255).into();
-
-            properties.push(PropertyDeclaration::TextDecorationLine(line));
-            properties.push(PropertyDeclaration::TextDecorationStyle(style));
-            properties.push(PropertyDeclaration::TextDecorationColor(color));
-
-            let serialization = shorthand_properties_to_string(properties);
-            assert_eq!(serialization, "text-decoration: overline dotted rgb(128, 0, 128);");
-        }
-
-        #[test]
-        fn text_decoration_should_not_serialize_initial_style_value() {
-            let mut properties = Vec::new();
-
-            let line = TextDecorationLine::UNDERLINE;
-            let style = TextDecorationStyle::solid;
-            let color = Color::currentcolor();
-
-            properties.push(PropertyDeclaration::TextDecorationLine(line));
-            properties.push(PropertyDeclaration::TextDecorationStyle(style));
-            properties.push(PropertyDeclaration::TextDecorationColor(color));
-
-            let serialization = shorthand_properties_to_string(properties);
-            assert_eq!(serialization, "text-decoration: underline;");
-        }
-    }
-
     mod four_sides_shorthands {
         pub use super::*;
 
@@ -592,60 +553,6 @@ mod shorthand_serialization {
         assert_eq!(serialization, "flex-flow: row wrap;");
     }
 
-    mod font {
-        use super::*;
-
-        #[test]
-        fn font_should_serialize_to_empty_if_there_are_nondefault_subproperties() {
-            // Test with non-default font-kerning value
-            let block_text = "font-style: italic; \
-                              font-variant: normal; \
-                              font-weight: bolder; \
-                              font-stretch: expanded; \
-                              font-size: 4px; \
-                              line-height: 3; \
-                              font-family: serif; \
-                              font-size-adjust: none; \
-                              font-variant-caps: normal; \
-                              font-variant-position: normal; \
-                              font-language-override: normal; \
-                              font-kerning: none";
-
-            let block = parse(|c, i| Ok(parse_property_declaration_list(c, i)), block_text).unwrap();
-
-            let mut s = String::new();
-            let id = PropertyId::parse("font".into()).unwrap();
-            let x = block.property_value_to_css(&id, &mut s);
-
-            assert_eq!(x.is_ok(), true);
-            assert_eq!(s, "");
-        }
-
-        #[test]
-        fn font_should_serialize_all_available_properties() {
-            let block_text = "font-style: italic; \
-                              font-variant: normal; \
-                              font-weight: bolder; \
-                              font-stretch: expanded; \
-                              font-size: 4px; \
-                              line-height: 3; \
-                              font-family: serif; \
-                              font-size-adjust: none; \
-                              font-kerning: auto; \
-                              font-variant-caps: normal; \
-                              font-variant-position: normal; \
-                              font-language-override: normal; \
-                              font-feature-settings: normal;";
-
-            let block = parse(|c, i| Ok(parse_property_declaration_list(c, i)), block_text).unwrap();
-
-            let serialization = block.to_css_string();
-
-            assert_eq!(serialization, "font: italic normal bolder expanded 4px/3 serif;");
-        }
-
-    }
-
     mod background {
         use super::*;
 
@@ -770,220 +677,6 @@ mod shorthand_serialization {
         }
     }
 
-    mod mask {
-        use style::properties::longhands::mask_clip as clip;
-        use style::properties::longhands::mask_composite as composite;
-        use style::properties::longhands::mask_image as image;
-        use style::properties::longhands::mask_mode as mode;
-        use style::properties::longhands::mask_origin as origin;
-        use style::properties::longhands::mask_position_x as position_x;
-        use style::properties::longhands::mask_position_y as position_y;
-        use style::properties::longhands::mask_repeat as repeat;
-        use style::properties::longhands::mask_size as size;
-        use style::values::Either;
-        use style::values::generics::background::BackgroundSize;
-        use style::values::generics::image::Image;
-        use super::*;
-
-        macro_rules! single_vec_value_typedef {
-            ($name:ident, $path:expr) => {
-                $name::SpecifiedValue(
-                    vec![$path]
-                )
-            };
-        }
-        macro_rules! single_vec_keyword_value {
-            ($name:ident, $kw:ident) => {
-                $name::SpecifiedValue(
-                    vec![$name::single_value::SpecifiedValue::$kw]
-                )
-            };
-        }
-        macro_rules! single_vec_variant_value {
-            ($name:ident, $variant:expr) => {
-                $name::SpecifiedValue(
-                        vec![$variant]
-                )
-            };
-        }
-
-        #[test]
-        fn mask_should_serialize_all_available_properties_when_specified() {
-            let mut properties = Vec::new();
-
-            let image = single_vec_value_typedef!(
-                image,
-                Either::Second(Image::Url(SpecifiedUrl::new_for_testing("http://servo/test.png")))
-            );
-
-            let mode = single_vec_keyword_value!(mode, luminance);
-
-            let position_x = single_vec_value_typedef!(position_x,
-                PositionComponent::Length(LengthOrPercentage::Length(NoCalcLength::from_px(7f32)))
-            );
-            let position_y = single_vec_value_typedef!(position_y,
-                PositionComponent::Side(
-                    Y::Bottom,
-                    Some(LengthOrPercentage::Length(NoCalcLength::from_px(4f32))),
-                )
-            );
-
-            let size = single_vec_variant_value!(
-                size,
-                BackgroundSize::Explicit {
-                    width: LengthOrPercentageOrAuto::Length(NoCalcLength::from_px(70f32)),
-                    height: LengthOrPercentageOrAuto::Length(NoCalcLength::from_px(50f32)),
-                }
-            );
-
-            let repeat = single_vec_keyword_value!(repeat, RepeatX);
-            let origin = single_vec_keyword_value!(origin, padding_box);
-            let clip = single_vec_keyword_value!(clip, border_box);
-            let composite = single_vec_keyword_value!(composite, subtract);
-
-            properties.push(PropertyDeclaration::MaskImage(image));
-            properties.push(PropertyDeclaration::MaskMode(mode));
-            properties.push(PropertyDeclaration::MaskPositionX(position_x));
-            properties.push(PropertyDeclaration::MaskPositionY(position_y));
-            properties.push(PropertyDeclaration::MaskSize(size));
-            properties.push(PropertyDeclaration::MaskRepeat(repeat));
-            properties.push(PropertyDeclaration::MaskOrigin(origin));
-            properties.push(PropertyDeclaration::MaskClip(clip));
-            properties.push(PropertyDeclaration::MaskComposite(composite));
-
-            let serialization = shorthand_properties_to_string(properties);
-            assert_eq!(
-                serialization,
-                "mask: url(\"http://servo/test.png\") luminance left 7px bottom 4px / 70px 50px \
-                repeat-x padding-box border-box subtract;"
-            );
-        }
-
-        #[test]
-        fn mask_should_combine_origin_and_clip_properties_when_equal() {
-            let mut properties = Vec::new();
-
-            let image = single_vec_value_typedef!(
-                image,
-                Either::Second(Image::Url(SpecifiedUrl::new_for_testing("http://servo/test.png")))
-            );
-
-            let mode = single_vec_keyword_value!(mode, luminance);
-
-            let position_x = single_vec_value_typedef!(position_x,
-                PositionComponent::Length(LengthOrPercentage::Length(NoCalcLength::from_px(7f32)))
-            );
-
-            let position_y = single_vec_value_typedef!(position_y,
-                PositionComponent::Length(LengthOrPercentage::Length(NoCalcLength::from_px(4f32)))
-            );
-
-            let size = single_vec_variant_value!(
-                size,
-                BackgroundSize::Explicit {
-                    width: LengthOrPercentageOrAuto::Length(NoCalcLength::from_px(70f32)),
-                    height: LengthOrPercentageOrAuto::Length(NoCalcLength::from_px(50f32)),
-                }
-            );
-
-            let repeat = single_vec_keyword_value!(repeat, RepeatX);
-            let origin = single_vec_keyword_value!(origin, padding_box);
-            let clip = single_vec_keyword_value!(clip, padding_box);
-            let composite = single_vec_keyword_value!(composite, subtract);
-
-            properties.push(PropertyDeclaration::MaskImage(image));
-            properties.push(PropertyDeclaration::MaskMode(mode));
-            properties.push(PropertyDeclaration::MaskPositionX(position_x));
-            properties.push(PropertyDeclaration::MaskPositionY(position_y));
-            properties.push(PropertyDeclaration::MaskSize(size));
-            properties.push(PropertyDeclaration::MaskRepeat(repeat));
-            properties.push(PropertyDeclaration::MaskOrigin(origin));
-            properties.push(PropertyDeclaration::MaskClip(clip));
-            properties.push(PropertyDeclaration::MaskComposite(composite));
-
-            let serialization = shorthand_properties_to_string(properties);
-            assert_eq!(
-                serialization,
-                "mask: url(\"http://servo/test.png\") luminance 7px 4px / 70px 50px \
-                repeat-x padding-box subtract;"
-            );
-        }
-
-        #[test]
-        fn serialize_mask_position_with_multiple_values() {
-            let block_text = "mask-position: 1px 2px, 4px 3px;";
-            let block = parse(|c, i| Ok(parse_property_declaration_list(c, i)), block_text).unwrap();
-            let serialization = block.to_css_string();
-            assert_eq!(serialization, block_text);
-        }
-
-        #[test]
-        fn mask_position_should_be_a_valid_form_its_longhands() {
-            // If there is any longhand consisted of both keyword and position,
-            // the shorthand result should be the 4-value format.
-            let block_text = "\
-                mask-position-x: 30px;\
-                mask-position-y: bottom 20px;";
-            let block = parse(|c, i| Ok(parse_property_declaration_list(c, i)), block_text).unwrap();
-            let serialization = block.to_css_string();
-            assert_eq!(serialization, "mask-position: left 30px bottom 20px;");
-
-            // If there is no longhand consisted of both keyword and position,
-            // the shorthand result should be the 2-value format.
-            let block_text = "\
-                mask-position-x: center;\
-                mask-position-y: 20px;";
-            let block = parse(|c, i| Ok(parse_property_declaration_list(c, i)), block_text).unwrap();
-            let serialization = block.to_css_string();
-            assert_eq!(serialization, "mask-position: center 20px;");
-        }
-    }
-
-    mod scroll_snap_type {
-        pub use super::*;
-        use style::properties::longhands::scroll_snap_type_x::SpecifiedValue as ScrollSnapTypeXValue;
-
-        #[test]
-        fn should_serialize_to_empty_string_if_sub_types_not_equal() {
-            let declarations = vec![
-                (PropertyDeclaration::ScrollSnapTypeX(ScrollSnapTypeXValue::mandatory),
-                Importance::Normal),
-                (PropertyDeclaration::ScrollSnapTypeY(ScrollSnapTypeXValue::none),
-                Importance::Normal)
-            ];
-
-            let block = block_from(declarations);
-
-            let mut s = String::new();
-
-            let id = PropertyId::parse("scroll-snap-type".into()).unwrap();
-            let x = block.single_value_to_css(&id, &mut s);
-
-            assert_eq!(x.is_ok(), true);
-            assert_eq!(s, "");
-        }
-
-        #[test]
-        fn should_serialize_to_single_value_if_sub_types_are_equal() {
-            let declarations = vec![
-                (PropertyDeclaration::ScrollSnapTypeX(ScrollSnapTypeXValue::mandatory),
-                Importance::Normal),
-                (PropertyDeclaration::ScrollSnapTypeY(ScrollSnapTypeXValue::mandatory),
-                Importance::Normal)
-            ];
-
-            let block = block_from(declarations);
-
-            let mut s = String::new();
-
-            let id = PropertyId::parse("scroll-snap-type".into()).unwrap();
-            let x = block.single_value_to_css(&id, &mut s);
-
-            assert_eq!(x.is_ok(), true);
-            assert_eq!(s, "mandatory");
-        }
-    }
-
     mod transform {
         pub use super::*;
         use style::properties::longhands::transform::SpecifiedOperation;
diff --git a/servo/tests/unit/style/rule_tree/bench.rs b/servo/tests/unit/style/rule_tree/bench.rs
index 598344a3236a..f208e0fdfd8c 100644
--- a/servo/tests/unit/style/rule_tree/bench.rs
+++ b/servo/tests/unit/style/rule_tree/bench.rs
@@ -13,6 +13,7 @@ use style::properties::{longhands, Importance, PropertyDeclaration, PropertyDecl
 use style::rule_tree::{CascadeLevel, RuleTree, StrongRuleNode, StyleSource};
 use style::shared_lock::SharedRwLock;
 use style::stylesheets::{Origin, Stylesheet, CssRule};
+use style::thread_state;
 use test::{self, Bencher};
 
 struct ErrorringErrorReporter;
@@ -92,6 +93,7 @@ fn test_insertion_style_attribute(rule_tree: &RuleTree, rules: &[(StyleSource, C
 #[bench]
 fn bench_insertion_basic(b: &mut Bencher) {
     let r = RuleTree::new();
+    thread_state::initialize(thread_state::SCRIPT);
 
     let rules_matched = parse_rules(
         ".foo { width: 200px; } \
@@ -110,6 +112,7 @@ fn bench_insertion_basic(b: &mut Bencher) {
 #[bench]
 fn bench_insertion_basic_per_element(b: &mut Bencher) {
     let r = RuleTree::new();
+    thread_state::initialize(thread_state::SCRIPT);
 
     let rules_matched = parse_rules(
         ".foo { width: 200px; } \
@@ -126,6 +129,7 @@ fn bench_insertion_basic_per_element(b: &mut Bencher) {
 #[bench]
 fn bench_expensive_insertion(b: &mut Bencher) {
     let r = RuleTree::new();
+    thread_state::initialize(thread_state::SCRIPT);
 
     // This test case tests a case where you style a bunch of siblings
     // matching the same rules, with a different style attribute each
@@ -148,6 +152,7 @@ fn bench_expensive_insertion(b: &mut Bencher) {
 #[bench]
 fn bench_insertion_basic_parallel(b: &mut Bencher) {
     let r = RuleTree::new();
+    thread_state::initialize(thread_state::SCRIPT);
 
     let rules_matched = parse_rules(
         ".foo { width: 200px; } \
@@ -177,8 +182,9 @@ fn bench_insertion_basic_parallel(b: &mut Bencher) {
 }
 
 #[bench]
-fn bench_expensive_insersion_parallel(b: &mut Bencher) {
+fn bench_expensive_insertion_parallel(b: &mut Bencher) {
     let r = RuleTree::new();
+    thread_state::initialize(thread_state::SCRIPT);
 
     let rules_matched = parse_rules(
         ".foo { width: 200px; } \
diff --git a/servo/tests/unit/style/stylesheets.rs b/servo/tests/unit/style/stylesheets.rs
index 17833893cf4e..582092041a4b 100644
--- a/servo/tests/unit/style/stylesheets.rs
+++ b/servo/tests/unit/style/stylesheets.rs
@@ -14,7 +14,6 @@ use servo_url::ServoUrl;
 use std::borrow::ToOwned;
 use std::sync::Mutex;
 use std::sync::atomic::AtomicBool;
-use style::computed_values::font_family::{FamilyName, FamilyNameSyntax};
 use style::context::QuirksMode;
 use style::error_reporting::{ParseErrorReporter, ContextualParseError};
 use style::media_queries::MediaList;
@@ -25,8 +24,6 @@ use style::properties::longhands::animation_timing_function;
 use style::shared_lock::SharedRwLock;
 use style::stylesheets::{Origin, Namespaces};
 use style::stylesheets::{Stylesheet, StylesheetContents, NamespaceRule, CssRule, CssRules, StyleRule, KeyframesRule};
-use style::stylesheets::font_feature_values_rule::{FFVDeclaration, FontFeatureValuesRule};
-use style::stylesheets::font_feature_values_rule::{SingleValue, PairValues, VectorValues};
 use style::stylesheets::keyframes_rule::{Keyframe, KeyframeSelector, KeyframePercentage};
 use style::values::{KeyframesName, CustomIdent};
 use style::values::computed::Percentage;
@@ -68,14 +65,6 @@ fn test_parse_stylesheet() {
                 animation-name: 'foo'; /* animation properties not allowed here */
                 animation-timing-function: ease; /* … except animation-timing-function */
             }
-        }
-        @font-feature-values test {
-            @swash { foo: 12; bar: 24; }
-            @swash { bar: 36; baz: 48; }
-            @stylistic { fooo: 14; }
-            @rubbish { shouldnt-parse: 1; }
-            @styleset { hello: 10 11 12; }
-            @character-variant { ok: 78 2; }
         }";
     let url = ServoUrl::parse("about::test").unwrap();
     let lock = SharedRwLock::new();
@@ -250,52 +239,7 @@ fn test_parse_stylesheet() {
                         line: 16,
                         column: 19,
                     },
-                }))),
-                CssRule::FontFeatureValues(Arc::new(stylesheet.shared_lock.wrap(FontFeatureValuesRule {
-                    family_names: vec![FamilyName {
-                        name: Atom::from("test"),
-                        syntax: FamilyNameSyntax::Identifiers(String::from("test")),
-                    }],
-                    swash: vec![
-                        FFVDeclaration {
-                            name: "foo".into(),
-                            value: SingleValue(12 as u32),
-                        },
-                        FFVDeclaration {
-                            name: "bar".into(),
-                            value: SingleValue(36 as u32),
-                        },
-                        FFVDeclaration {
-                            name: "baz".into(),
-                            value: SingleValue(48 as u32),
-                        }
-                    ],
-                    stylistic: vec![
-                        FFVDeclaration {
-                            name: "fooo".into(),
-                            value: SingleValue(14 as u32),
-                        }
-                    ],
-                    ornaments: vec![],
-                    annotation: vec![],
-                    character_variant: vec![
-                        FFVDeclaration {
-                            name: "ok".into(),
-                            value: PairValues(78 as u32, Some(2 as u32)),
-                        },
-                    ],
-                    styleset: vec![
-                        FFVDeclaration {
-                            name: "hello".into(),
-                            value: VectorValues(vec![10 as u32, 11 as u32, 12 as u32]),
-                        },
-                    ],
-                    source_location: SourceLocation {
-                        line: 25,
-                        column: 29,
-                    },
                 })))
-
             ], &stylesheet.shared_lock),
         },
         media: Arc::new(stylesheet.shared_lock.wrap(MediaList::empty())),
diff --git a/servo/tests/unit/style/stylist.rs b/servo/tests/unit/style/stylist.rs
index 4bbe00937601..bec4c136b777 100644
--- a/servo/tests/unit/style/stylist.rs
+++ b/servo/tests/unit/style/stylist.rs
@@ -229,6 +229,7 @@ fn mock_stylist() -> Stylist {
 
 #[test]
 fn test_stylist_device_accessors() {
+    thread_state::initialize(thread_state::LAYOUT);
     let stylist = mock_stylist();
     assert_eq!(stylist.device().media_type(), MediaType::Screen);
     let mut stylist_mut = mock_stylist();
@@ -237,6 +238,7 @@ fn test_stylist_device_accessors() {
 
 #[test]
 fn test_stylist_rule_tree_accessors() {
+    thread_state::initialize(thread_state::LAYOUT);
     let stylist = mock_stylist();
     stylist.rule_tree();
     stylist.rule_tree().root();