diff --git a/tests/unit/style/parsing/basic_shape.rs b/tests/unit/style/parsing/basic_shape.rs
index da829e7c29d..6363e7772ca 100644
--- a/tests/unit/style/parsing/basic_shape.rs
+++ b/tests/unit/style/parsing/basic_shape.rs
@@ -5,6 +5,7 @@
 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
@@ -21,14 +22,14 @@ macro_rules! assert_border_radius_values {
         let input = parse(BorderRadius::parse, $input)
                           .expect(&format!("Failed parsing {} as border radius",
                                   $input));
-        assert_eq!(::cssparser::ToCss::to_css_string(&input.top_left.0.width), $tlw);
-        assert_eq!(::cssparser::ToCss::to_css_string(&input.top_right.0.width), $trw);
-        assert_eq!(::cssparser::ToCss::to_css_string(&input.bottom_right.0.width), $brw);
-        assert_eq!(::cssparser::ToCss::to_css_string(&input.bottom_left.0.width), $blw);
-        assert_eq!(::cssparser::ToCss::to_css_string(&input.top_left.0.height), $tlh);
-        assert_eq!(::cssparser::ToCss::to_css_string(&input.top_right.0.height), $trh);
-        assert_eq!(::cssparser::ToCss::to_css_string(&input.bottom_right.0.height), $brh);
-        assert_eq!(::cssparser::ToCss::to_css_string(&input.bottom_left.0.height), $blh);
+        assert_eq!(::style_traits::ToCss::to_css_string(&input.top_left.0.width), $tlw);
+        assert_eq!(::style_traits::ToCss::to_css_string(&input.top_right.0.width), $trw);
+        assert_eq!(::style_traits::ToCss::to_css_string(&input.bottom_right.0.width), $brw);
+        assert_eq!(::style_traits::ToCss::to_css_string(&input.bottom_left.0.width), $blw);
+        assert_eq!(::style_traits::ToCss::to_css_string(&input.top_left.0.height), $tlh);
+        assert_eq!(::style_traits::ToCss::to_css_string(&input.top_right.0.height), $trh);
+        assert_eq!(::style_traits::ToCss::to_css_string(&input.bottom_right.0.height), $brh);
+        assert_eq!(::style_traits::ToCss::to_css_string(&input.bottom_left.0.height), $blh);
     }
 }
 
diff --git a/tests/unit/style/parsing/font.rs b/tests/unit/style/parsing/font.rs
index 1873314dc89..178a43f6e9b 100644
--- a/tests/unit/style/parsing/font.rs
+++ b/tests/unit/style/parsing/font.rs
@@ -9,6 +9,7 @@ use style::properties::longhands::font_feature_settings;
 use style::properties::longhands::font_feature_settings::computed_value;
 use style::properties::longhands::font_feature_settings::computed_value::FeatureTagValue;
 use style::stylesheets::Origin;
+use style_traits::ToCss;
 use url::Url;
 
 #[test]
@@ -100,7 +101,7 @@ fn font_language_override_should_parse_properly() {
 #[test]
 #[should_panic]
 fn font_language_override_should_fail_on_empty_str() {
-    use style::properties::longhands::font_language_override::{self, SpecifiedValue};
+    use style::properties::longhands::font_language_override;
 
     parse_longhand!(font_language_override, "");
 }
diff --git a/tests/unit/style/parsing/image.rs b/tests/unit/style/parsing/image.rs
index 23679196fc5..d6d8651381e 100644
--- a/tests/unit/style/parsing/image.rs
+++ b/tests/unit/style/parsing/image.rs
@@ -7,6 +7,7 @@ use media_queries::CSSErrorReporterTest;
 use style::parser::ParserContext;
 use style::stylesheets::Origin;
 use style::values::specified::image::*;
+use style_traits::ToCss;
 use url::Url;
 
 #[test]
diff --git a/tests/unit/style/parsing/mod.rs b/tests/unit/style/parsing/mod.rs
index 80c6cfff68d..f2fed25b7fd 100644
--- a/tests/unit/style/parsing/mod.rs
+++ b/tests/unit/style/parsing/mod.rs
@@ -21,12 +21,12 @@ macro_rules! assert_roundtrip {
     ($fun:expr, $input:expr, $output:expr) => {
         let parsed = $crate::parsing::parse($fun, $input)
                         .expect(&format!("Failed to parse {}", $input));
-        let serialized = ::cssparser::ToCss::to_css_string(&parsed);
+        let serialized = ToCss::to_css_string(&parsed);
         assert_eq!(serialized, $output);
 
         let re_parsed = $crate::parsing::parse($fun, &serialized)
                         .expect(&format!("Failed to parse serialization {}", $input));
-        let re_serialized = ::cssparser::ToCss::to_css_string(&re_parsed);
+        let re_serialized = ToCss::to_css_string(&re_parsed);
         assert_eq!(serialized, re_serialized);
     }
 }
@@ -41,13 +41,13 @@ macro_rules! assert_roundtrip_with_context {
         let mut parser = Parser::new($input);
         let parsed = $fun(&context, &mut parser)
                      .expect(&format!("Failed to parse {}", $input));
-        let serialized = ::cssparser::ToCss::to_css_string(&parsed);
+        let serialized = ToCss::to_css_string(&parsed);
         assert_eq!(serialized, $output);
 
         let mut parser = Parser::new(&serialized);
         let re_parsed = $fun(&context, &mut parser)
                         .expect(&format!("Failed to parse {}", $input));
-        let re_serialized = ::cssparser::ToCss::to_css_string(&re_parsed);
+        let re_serialized = ToCss::to_css_string(&re_parsed);
         assert_eq!(serialized, re_serialized);
     }
 }
diff --git a/tests/unit/style/parsing/position.rs b/tests/unit/style/parsing/position.rs
index f82a09da0d3..17a9e92679d 100644
--- a/tests/unit/style/parsing/position.rs
+++ b/tests/unit/style/parsing/position.rs
@@ -4,6 +4,7 @@
 
 use parsing::parse;
 use style::values::specified::position::*;
+use style_traits::ToCss;
 
 #[test]
 fn test_position() {
diff --git a/tests/unit/style/parsing/selectors.rs b/tests/unit/style/parsing/selectors.rs
index abd1a3b5e9a..f7cb562c274 100644
--- a/tests/unit/style/parsing/selectors.rs
+++ b/tests/unit/style/parsing/selectors.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 cssparser::Parser;
+use cssparser::{Parser, ToCss};
 use selectors::parser::{Selector, ParserContext, parse_selector_list};
 use style::selector_impl::TheSelectorImpl;
 
diff --git a/tests/unit/style/properties/serialization.rs b/tests/unit/style/properties/serialization.rs
index 20c4d1eba07..3b920059b62 100644
--- a/tests/unit/style/properties/serialization.rs
+++ b/tests/unit/style/properties/serialization.rs
@@ -2,7 +2,6 @@
  * 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/. */
 
-pub use cssparser::ToCss;
 pub use std::sync::Arc;
 pub use style::computed_values::display::T::inline_block;
 pub use style::properties::{DeclaredValue, PropertyDeclaration, PropertyDeclarationBlock, Importance};
@@ -11,6 +10,7 @@ pub use style::values::specified::{LengthOrPercentage, LengthOrPercentageOrAuto,
 pub use style::properties::longhands::outline_color::computed_value::T as ComputedColor;
 pub use style::values::RGBA;
 pub use style::values::specified::UrlExtraData;
+pub use style_traits::ToCss;
 pub use url::Url;
 
 #[test]
diff --git a/tests/unit/stylo/lib.rs b/tests/unit/stylo/lib.rs
index 8690c17f517..03df4957b9a 100644
--- a/tests/unit/stylo/lib.rs
+++ b/tests/unit/stylo/lib.rs
@@ -11,6 +11,7 @@ extern crate libc;
 #[macro_use] extern crate log;
 extern crate parking_lot;
 extern crate style;
+extern crate style_traits;
 extern crate url;
 
 mod sanity_checks;