diff --git a/mkmain.rs b/mkmain.rs
index c4d50d526..4ae471c41 100644
--- a/mkmain.rs
+++ b/mkmain.rs
@@ -3,7 +3,7 @@ use std::fs::File;
 use std::io::Write;
 use std::path::Path;
 
-static TEMPLATE: &'static str = "\
+static TEMPLATE: &str = "\
 extern crate uu_@UTIL_CRATE@;
 extern crate uucore;
 
diff --git a/src/factor/build.rs b/src/factor/build.rs
index 0ef305c19..ba9ac6f19 100644
--- a/src/factor/build.rs
+++ b/src/factor/build.rs
@@ -137,7 +137,7 @@ fn test_generator() {
 }
 
 const MAX_WIDTH: usize = 102;
-const PREAMBLE: &'static str = r##"/*
+const PREAMBLE: &str = r##"/*
 * This file is part of the uutils coreutils package.
 *
 * (c) kwantam <kwantam@gmail.com>
diff --git a/src/factor/sieve.rs b/src/factor/sieve.rs
index 85d846b19..6ae2cac1b 100644
--- a/src/factor/sieve.rs
+++ b/src/factor/sieve.rs
@@ -126,11 +126,11 @@ impl Wheel {
 
 /// The increments of a wheel of circumference 210
 /// (i.e., a wheel that skips all multiples of 2, 3, 5, 7)
-const WHEEL_INCS: &'static [u64] = &[
+const WHEEL_INCS: &[u64] = &[
     2, 4, 2, 4, 6, 2, 6, 4, 2, 4, 6, 6, 2, 6, 4, 2, 6, 4, 6, 8, 4, 2, 4, 2, 4, 8, 6, 4, 6, 2, 4, 6,
     2, 6, 6, 4, 2, 4, 6, 2, 6, 4, 2, 4, 2, 10, 2, 10,
 ];
-const INIT_PRIMES: &'static [u64] = &[2, 3, 5, 7];
+const INIT_PRIMES: &[u64] = &[2, 3, 5, 7];
 
 /// A min-heap of "infinite lists" of prime multiples, where a list is
 /// represented as (head, increment).
diff --git a/tests/common/util.rs b/tests/common/util.rs
index ce0779077..7ac373c8b 100644
--- a/tests/common/util.rs
+++ b/tests/common/util.rs
@@ -18,18 +18,17 @@ use std::thread::sleep;
 use std::time::Duration;
 
 #[cfg(windows)]
-static PROGNAME: &'static str = "uutils.exe";
+static PROGNAME: &str = "uutils.exe";
 #[cfg(not(windows))]
-static PROGNAME: &'static str = "uutils";
+static PROGNAME: &str = "uutils";
 
-static TESTS_DIR: &'static str = "tests";
-static FIXTURES_DIR: &'static str = "fixtures";
+static TESTS_DIR: &str = "tests";
+static FIXTURES_DIR: &str = "fixtures";
 
-static ALREADY_RUN: &'static str =
-    " you have already run this UCommand, if you want to run \
+static ALREADY_RUN: &str = " you have already run this UCommand, if you want to run \
      another command in the same test, use TestScenario::new instead of \
      testing();";
-static MULTIPLE_STDIN_MEANINGLESS: &'static str = "Ucommand is designed around a typical use case of: provide args and input stream -> spawn process -> block until completion -> return output streams. For verifying that a particular section of the input stream is what causes a particular behavior, use the Command type directly.";
+static MULTIPLE_STDIN_MEANINGLESS: &str = "Ucommand is designed around a typical use case of: provide args and input stream -> spawn process -> block until completion -> return output streams. For verifying that a particular section of the input stream is what causes a particular behavior, use the Command type directly.";
 
 /// Test if the program is running under WSL
 // ref: <https://github.com/microsoft/WSL/issues/4555> @@ <https://archive.is/dP0bz>