diff --git a/src/cow_rc_str.rs b/src/cow_rc_str.rs
index f89f4cda..026f49d3 100644
--- a/src/cow_rc_str.rs
+++ b/src/cow_rc_str.rs
@@ -12,7 +12,6 @@ use std::ops::Deref;
 use std::rc::Rc;
 use std::slice;
 use std::str;
-use std::usize;
 
 /// A string that is either shared (heap-allocated and reference-counted) or borrowed.
 ///
diff --git a/src/tests.rs b/src/tests.rs
index 654f3f7a..4ced0a44 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -631,7 +631,6 @@ fn line_numbers() {
 
 #[test]
 fn overflow() {
-    use std::f32;
     use std::iter::repeat;
 
     let css = r"
diff --git a/src/tokenizer.rs b/src/tokenizer.rs
index 62f38683..0f51d340 100644
--- a/src/tokenizer.rs
+++ b/src/tokenizer.rs
@@ -9,7 +9,6 @@ use crate::cow_rc_str::CowRcStr;
 use crate::parser::ParserState;
 use matches::matches;
 use std::char;
-use std::i32;
 use std::ops::Range;
 
 /// One of the pieces the CSS input is broken into.