diff --git a/procedural-masquerade/lib.rs b/procedural-masquerade/lib.rs
index 22cdeeb1..e36b75bb 100644
--- a/procedural-masquerade/lib.rs
+++ b/procedural-masquerade/lib.rs
@@ -200,14 +200,14 @@ pub fn _extract_input(derive_input: &str) -> &str {
 
     for expected in &["#[allow(unused)]", "enum", "ProceduralMasqueradeDummyType", "{",
                      "Input", "=", "(0,", "stringify!", "("] {
-        input = input.trim_left();
+        input = input.trim_start();
         assert!(input.starts_with(expected),
                 "expected prefix {:?} not found in {:?}", expected, derive_input);
         input = &input[expected.len()..];
     }
 
     for expected in [")", ").0,", "}"].iter().rev() {
-        input = input.trim_right();
+        input = input.trim_end();
         assert!(input.ends_with(expected),
                 "expected suffix {:?} not found in {:?}", expected, derive_input);
         let end = input.len() - expected.len();
diff --git a/src/size_of_tests.rs b/src/size_of_tests.rs
index b07abc07..e59e9498 100644
--- a/src/size_of_tests.rs
+++ b/src/size_of_tests.rs
@@ -6,7 +6,6 @@ use cow_rc_str::CowRcStr;
 use std::borrow::Cow;
 use tokenizer::Token;
 
-#[macro_export]
 macro_rules! size_of_test {
     ($testname: ident, $t: ty, $expected_size: expr) => {
         #[test]