diff --git a/tests/unit/style/viewport.rs b/tests/unit/style/viewport.rs
index 7321adf2d06..9b48d16e07e 100644
--- a/tests/unit/style/viewport.rs
+++ b/tests/unit/style/viewport.rs
@@ -11,7 +11,7 @@ use servo_config::prefs::{PREFS, PrefValue};
 use servo_url::ServoUrl;
 use style::context::QuirksMode;
 use style::media_queries::{Device, MediaList, MediaType};
-use style::parser::{Parse, ParserContext, ParserErrorContext};
+use style::parser::{ParserContext, ParserErrorContext};
 use style::shared_lock::SharedRwLock;
 use style::stylesheets::{CssRuleType, Stylesheet, StylesheetInDocument, Origin};
 use style::stylesheets::viewport_rule::*;
diff --git a/tests/unit/stylo/lib.rs b/tests/unit/stylo/lib.rs
index 0b7da6ad03c..85ac29c09e5 100644
--- a/tests/unit/stylo/lib.rs
+++ b/tests/unit/stylo/lib.rs
@@ -12,7 +12,6 @@ extern crate selectors;
 #[macro_use] extern crate style;
 extern crate style_traits;
 
-mod sanity_checks;
 #[cfg(target_pointer_width = "64")]
 mod size_of;
 mod specified_values;
diff --git a/tests/unit/stylo/sanity_checks.rs b/tests/unit/stylo/sanity_checks.rs
deleted file mode 100644
index c7558d3055c..00000000000
--- a/tests/unit/stylo/sanity_checks.rs
+++ /dev/null
@@ -1,28 +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/. */
-
-//! Different static asserts that ensure the build does what it's expected to.
-//!
-//! TODO: maybe cfg(test) this?
-
-#![allow(unused_imports)]
-
-use std::mem;
-
-macro_rules! check_enum_value {
-    ($a:expr, $b:expr) => {
-        unsafe {
-            mem::transmute::<[u32; $a as usize],
-                             [u32; $b as usize]>([0; $a as usize]);
-        }
-    }
-}
-
-// NB: It's a shame we can't do this statically with bitflags, but no
-// const-fn and no other way to access the numerical value :-(
-macro_rules! check_enum_value_non_static {
-    ($a:expr, $b:expr) => {
-        assert_eq!($a.0 as usize, $b as usize);
-    }
-}
diff --git a/tests/unit/stylo/specified_values.rs b/tests/unit/stylo/specified_values.rs
index d373966c41f..6bc01a97a46 100644
--- a/tests/unit/stylo/specified_values.rs
+++ b/tests/unit/stylo/specified_values.rs
@@ -5,6 +5,7 @@
 use style;
 
 #[cfg(all(test, target_pointer_width = "64"))]
+#[test]
 fn size_of_specified_values() {
     use std::mem::size_of;
     let threshold = 24;