diff --git a/clippy_lints/src/misc_early/mixed_case_hex_literals.rs b/clippy_lints/src/misc_early/mixed_case_hex_literals.rs
index 98b0f7b56644..80e242131007 100644
--- a/clippy_lints/src/misc_early/mixed_case_hex_literals.rs
+++ b/clippy_lints/src/misc_early/mixed_case_hex_literals.rs
@@ -4,7 +4,7 @@ use rustc_lint::EarlyContext;
 
 use super::MIXED_CASE_HEX_LITERALS;
 
-pub(super) fn check(cx: &EarlyContext<'_>, lit: &Lit, suffix: &str, lit_snip: String) {
+pub(super) fn check(cx: &EarlyContext<'_>, lit: &Lit, suffix: &str, lit_snip: &str) {
     let maybe_last_sep_idx = if let Some(val) = lit_snip.len().checked_sub(suffix.len() + 1) {
         val
     } else {
diff --git a/clippy_lints/src/misc_early/mod.rs b/clippy_lints/src/misc_early/mod.rs
index 146d0c367a85..dd38316fa25b 100644
--- a/clippy_lints/src/misc_early/mod.rs
+++ b/clippy_lints/src/misc_early/mod.rs
@@ -334,11 +334,11 @@ impl MiscEarlyLints {
             };
             unseparated_literal_suffix::check(cx, lit, &lit_snip, suffix, "integer");
             if lit_snip.starts_with("0x") {
-                mixed_case_hex_literals::check(cx, lit, suffix, lit_snip)
+                mixed_case_hex_literals::check(cx, lit, suffix, &lit_snip)
             } else if lit_snip.starts_with("0b") || lit_snip.starts_with("0o") {
                 /* nothing to do */
             } else if value != 0 && lit_snip.starts_with('0') {
-                zero_prefixed_literal::check(cx, lit, lit_snip)
+                zero_prefixed_literal::check(cx, lit, &lit_snip)
             }
         } else if let LitKind::Float(_, LitFloatType::Suffixed(float_ty)) = lit.kind {
             let suffix = float_ty.name_str();
diff --git a/clippy_lints/src/misc_early/unseparated_literal_suffix.rs b/clippy_lints/src/misc_early/unseparated_literal_suffix.rs
index 1ffdd4cf6762..2018aa6184a8 100644
--- a/clippy_lints/src/misc_early/unseparated_literal_suffix.rs
+++ b/clippy_lints/src/misc_early/unseparated_literal_suffix.rs
@@ -5,7 +5,7 @@ use rustc_lint::EarlyContext;
 
 use super::UNSEPARATED_LITERAL_SUFFIX;
 
-pub(super) fn check(cx: &EarlyContext<'_>, lit: &Lit, lit_snip: &String, suffix: &str, sugg_type: &str) {
+pub(super) fn check(cx: &EarlyContext<'_>, lit: &Lit, lit_snip: &str, suffix: &str, sugg_type: &str) {
     let maybe_last_sep_idx = if let Some(val) = lit_snip.len().checked_sub(suffix.len() + 1) {
         val
     } else {
diff --git a/clippy_lints/src/misc_early/zero_prefixed_literal.rs b/clippy_lints/src/misc_early/zero_prefixed_literal.rs
index 16add0fa1b43..4963bba82f2d 100644
--- a/clippy_lints/src/misc_early/zero_prefixed_literal.rs
+++ b/clippy_lints/src/misc_early/zero_prefixed_literal.rs
@@ -5,7 +5,7 @@ use rustc_lint::EarlyContext;
 
 use super::ZERO_PREFIXED_LITERAL;
 
-pub(super) fn check(cx: &EarlyContext<'_>, lit: &Lit, lit_snip: String) {
+pub(super) fn check(cx: &EarlyContext<'_>, lit: &Lit, lit_snip: &str) {
     span_lint_and_then(
         cx,
         ZERO_PREFIXED_LITERAL,