diff --git a/src/librustc/mir/mod.rs b/src/librustc/mir/mod.rs
index 36818020569..51718592fd9 100644
--- a/src/librustc/mir/mod.rs
+++ b/src/librustc/mir/mod.rs
@@ -1198,7 +1198,7 @@ impl<'tcx> TerminatorKind<'tcx> {
         t: BasicBlock,
         f: BasicBlock,
     ) -> TerminatorKind<'tcx> {
-        static BOOL_SWITCH_FALSE: &'static [u128] = &[0];
+        static BOOL_SWITCH_FALSE: &[u128] = &[0];
         TerminatorKind::SwitchInt {
             discr: cond,
             switch_ty: tcx.types.bool,
diff --git a/src/librustc_mir/dataflow/generic/graphviz.rs b/src/librustc_mir/dataflow/generic/graphviz.rs
index 157526d3c51..f8e1d3e9fe8 100644
--- a/src/librustc_mir/dataflow/generic/graphviz.rs
+++ b/src/librustc_mir/dataflow/generic/graphviz.rs
@@ -604,8 +604,8 @@ fn write_diff<A: Analysis<'tcx>>(
     Ok(())
 }
 
-const BR_LEFT: &'static str = r#"<br align="left"/>"#;
-const BR_LEFT_SPACE: &'static str = r#"<br align="left"/> "#;
+const BR_LEFT: &str = r#"<br align="left"/>"#;
+const BR_LEFT_SPACE: &str = r#"<br align="left"/> "#;
 
 /// Line break policy that breaks at 40 characters and starts the next line with a single space.
 const LIMIT_30_ALIGN_1: Option<LineBreak> = Some(LineBreak { sequence: BR_LEFT_SPACE, limit: 30 });
diff --git a/src/librustc_parse/parser/diagnostics.rs b/src/librustc_parse/parser/diagnostics.rs
index 0759c43d452..8b43b424f55 100644
--- a/src/librustc_parse/parser/diagnostics.rs
+++ b/src/librustc_parse/parser/diagnostics.rs
@@ -19,7 +19,7 @@ use rustc_span::{MultiSpan, Span, SpanSnippetError, DUMMY_SP};
 use log::{debug, trace};
 use std::mem;
 
-const TURBOFISH: &'static str = "use `::<...>` instead of `<...>` to specify type arguments";
+const TURBOFISH: &str = "use `::<...>` instead of `<...>` to specify type arguments";
 
 /// Creates a placeholder argument.
 pub(super) fn dummy_arg(ident: Ident) -> Param {
diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index 7c845a9b66b..4c7765b2965 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -50,7 +50,7 @@ pub use self::types::Type::*;
 pub use self::types::Visibility::{Inherited, Public};
 pub use self::types::*;
 
-const FN_OUTPUT_NAME: &'static str = "Output";
+const FN_OUTPUT_NAME: &str = "Output";
 
 pub trait Clean<T> {
     fn clean(&self, cx: &DocContext<'_>) -> T;
diff --git a/src/librustdoc/html/item_type.rs b/src/librustdoc/html/item_type.rs
index b4486fdb7a7..0b2b0cdc18b 100644
--- a/src/librustdoc/html/item_type.rs
+++ b/src/librustdoc/html/item_type.rs
@@ -194,7 +194,7 @@ impl fmt::Display for ItemType {
     }
 }
 
-pub const NAMESPACE_TYPE: &'static str = "t";
-pub const NAMESPACE_VALUE: &'static str = "v";
-pub const NAMESPACE_MACRO: &'static str = "m";
-pub const NAMESPACE_KEYWORD: &'static str = "k";
+pub const NAMESPACE_TYPE: &str = "t";
+pub const NAMESPACE_VALUE: &str = "v";
+pub const NAMESPACE_MACRO: &str = "m";
+pub const NAMESPACE_KEYWORD: &str = "k";
diff --git a/src/librustdoc/html/render.rs b/src/librustdoc/html/render.rs
index f357c962991..07fe439ace2 100644
--- a/src/librustdoc/html/render.rs
+++ b/src/librustdoc/html/render.rs
@@ -3150,7 +3150,7 @@ fn render_attribute(attr: &ast::MetaItem) -> Option<String> {
     }
 }
 
-const ATTRIBUTE_WHITELIST: &'static [Symbol] = &[
+const ATTRIBUTE_WHITELIST: &[Symbol] = &[
     sym::export_name,
     sym::lang,
     sym::link_section,
@@ -4610,7 +4610,7 @@ fn item_keyword(w: &mut Buffer, cx: &Context, it: &clean::Item) {
     document(w, cx, it)
 }
 
-crate const BASIC_KEYWORDS: &'static str = "rust, rustlang, rust-lang";
+crate const BASIC_KEYWORDS: &str = "rust, rustlang, rust-lang";
 
 fn make_item_keywords(it: &clean::Item) -> String {
     format!("{}, {}", BASIC_KEYWORDS, it.name.as_ref().unwrap())
diff --git a/src/libstd/sys/unix/process/process_common.rs b/src/libstd/sys/unix/process/process_common.rs
index 83f052c898b..859da691ad2 100644
--- a/src/libstd/sys/unix/process/process_common.rs
+++ b/src/libstd/sys/unix/process/process_common.rs
@@ -19,9 +19,9 @@ cfg_if::cfg_if! {
     if #[cfg(target_os = "fuchsia")] {
         // fuchsia doesn't have /dev/null
     } else if #[cfg(target_os = "redox")] {
-        const DEV_NULL: &'static str = "null:\0";
+        const DEV_NULL: &str = "null:\0";
     } else {
-        const DEV_NULL: &'static str = "/dev/null\0";
+        const DEV_NULL: &str = "/dev/null\0";
     }
 }
 
diff --git a/src/libtest/lib.rs b/src/libtest/lib.rs
index b42e41cbfe6..6bd3399cd17 100644
--- a/src/libtest/lib.rs
+++ b/src/libtest/lib.rs
@@ -96,7 +96,7 @@ use time::TestExecTime;
 // Process exit code to be used to indicate test failures.
 const ERROR_EXIT_CODE: i32 = 101;
 
-const SECONDARY_TEST_INVOKER_VAR: &'static str = "__RUST_TEST_INVOKE";
+const SECONDARY_TEST_INVOKER_VAR: &str = "__RUST_TEST_INVOKE";
 
 // The default console test runner. It accepts the command line
 // arguments and a vector of test_descs.