diff --git a/crates/ide-diagnostics/src/handlers/inactive_code.rs b/crates/ide-diagnostics/src/handlers/inactive_code.rs
index 9f754f9c6f..7db5ea04fb 100644
--- a/crates/ide-diagnostics/src/handlers/inactive_code.rs
+++ b/crates/ide-diagnostics/src/handlers/inactive_code.rs
@@ -16,7 +16,7 @@ pub(crate) fn inactive_code(
     }
 
     let inactive = DnfExpr::new(d.cfg.clone()).why_inactive(&d.opts);
-    let mut message = "code is inactive due to #[cfg] directives".to_string();
+    let mut message = "code is inactive due to #[cfg] directives".to_owned();
 
     if let Some(inactive) = inactive {
         let inactive_reasons = inactive.to_string();
diff --git a/crates/ide-diagnostics/src/handlers/incoherent_impl.rs b/crates/ide-diagnostics/src/handlers/incoherent_impl.rs
index 3b4d400912..9f56e10414 100644
--- a/crates/ide-diagnostics/src/handlers/incoherent_impl.rs
+++ b/crates/ide-diagnostics/src/handlers/incoherent_impl.rs
@@ -9,7 +9,7 @@ pub(crate) fn incoherent_impl(ctx: &DiagnosticsContext<'_>, d: &hir::IncoherentI
     Diagnostic::new_with_syntax_node_ptr(
         ctx,
         DiagnosticCode::RustcHardError("E0210"),
-        "cannot define inherent `impl` for foreign type".to_string(),
+        "cannot define inherent `impl` for foreign type".to_owned(),
         InFile::new(d.file_id, d.impl_.into()),
     )
 }
diff --git a/crates/ide-diagnostics/src/handlers/incorrect_case.rs b/crates/ide-diagnostics/src/handlers/incorrect_case.rs
index 96fbb4468f..dd64b93e45 100644
--- a/crates/ide-diagnostics/src/handlers/incorrect_case.rs
+++ b/crates/ide-diagnostics/src/handlers/incorrect_case.rs
@@ -512,7 +512,7 @@ impl BAD_TRAIT for () {
     fn BadFunction() {}
 }
     "#,
-            std::iter::once("unused_variables".to_string()),
+            std::iter::once("unused_variables".to_owned()),
         );
     }
 
diff --git a/crates/ide-diagnostics/src/handlers/json_is_not_rust.rs b/crates/ide-diagnostics/src/handlers/json_is_not_rust.rs
index d330973aaa..241fddbb90 100644
--- a/crates/ide-diagnostics/src/handlers/json_is_not_rust.rs
+++ b/crates/ide-diagnostics/src/handlers/json_is_not_rust.rs
@@ -42,12 +42,12 @@ impl State {
             v.push("Deserialize");
         }
         match v.as_slice() {
-            [] => "".to_string(),
+            [] => "".to_owned(),
             [x] => format!("#[derive({x})]\n"),
             [x, y] => format!("#[derive({x}, {y})]\n"),
             _ => {
                 never!();
-                "".to_string()
+                "".to_owned()
             }
         }
     }
@@ -176,7 +176,7 @@ mod tests {
     #[test]
     fn diagnostic_for_simple_case() {
         let mut config = DiagnosticsConfig::test_sample();
-        config.disabled.insert("syntax-error".to_string());
+        config.disabled.insert("syntax-error".to_owned());
         check_diagnostics_with_config(
             config,
             r#"
diff --git a/crates/ide-diagnostics/src/handlers/macro_error.rs b/crates/ide-diagnostics/src/handlers/macro_error.rs
index fc5c715981..e4cb53f3a2 100644
--- a/crates/ide-diagnostics/src/handlers/macro_error.rs
+++ b/crates/ide-diagnostics/src/handlers/macro_error.rs
@@ -99,7 +99,7 @@ pub macro panic {
 
         // FIXME: This is a false-positive, the file is actually linked in via
         // `include!` macro
-        config.disabled.insert("unlinked-file".to_string());
+        config.disabled.insert("unlinked-file".to_owned());
 
         check_diagnostics_with_config(
             config,
@@ -268,8 +268,8 @@ fn f() {
     #[test]
     fn include_does_not_break_diagnostics() {
         let mut config = DiagnosticsConfig::test_sample();
-        config.disabled.insert("inactive-code".to_string());
-        config.disabled.insert("unlinked-file".to_string());
+        config.disabled.insert("inactive-code".to_owned());
+        config.disabled.insert("unlinked-file".to_owned());
         check_diagnostics_with_config(
             config,
             r#"
diff --git a/crates/ide-diagnostics/src/handlers/missing_fields.rs b/crates/ide-diagnostics/src/handlers/missing_fields.rs
index 3bc043c8fc..c70f39eb28 100644
--- a/crates/ide-diagnostics/src/handlers/missing_fields.rs
+++ b/crates/ide-diagnostics/src/handlers/missing_fields.rs
@@ -170,7 +170,7 @@ fn make_ty(ty: &hir::Type, db: &dyn HirDatabase, module: hir::Module) -> ast::Ty
     let ty_str = match ty.as_adt() {
         Some(adt) => adt.name(db).display(db.upcast()).to_string(),
         None => {
-            ty.display_source_code(db, module.into(), false).ok().unwrap_or_else(|| "_".to_string())
+            ty.display_source_code(db, module.into(), false).ok().unwrap_or_else(|| "_".to_owned())
         }
     };
 
diff --git a/crates/ide-diagnostics/src/handlers/missing_match_arms.rs b/crates/ide-diagnostics/src/handlers/missing_match_arms.rs
index cb6d568442..17dc679e05 100644
--- a/crates/ide-diagnostics/src/handlers/missing_match_arms.rs
+++ b/crates/ide-diagnostics/src/handlers/missing_match_arms.rs
@@ -31,7 +31,7 @@ mod tests {
     #[test]
     fn empty_body() {
         let mut config = DiagnosticsConfig::test_sample();
-        config.disabled.insert("syntax-error".to_string());
+        config.disabled.insert("syntax-error".to_owned());
         check_diagnostics_with_config(
             config,
             r#"
diff --git a/crates/ide-diagnostics/src/handlers/mutability_errors.rs b/crates/ide-diagnostics/src/handlers/mutability_errors.rs
index d9804cbd94..bdb55a9d98 100644
--- a/crates/ide-diagnostics/src/handlers/mutability_errors.rs
+++ b/crates/ide-diagnostics/src/handlers/mutability_errors.rs
@@ -19,7 +19,7 @@ pub(crate) fn need_mut(ctx: &DiagnosticsContext<'_>, d: &hir::NeedMut) -> Diagno
         for source in d.local.sources(ctx.sema.db) {
             let Some(ast) = source.name() else { continue };
             // FIXME: macros
-            edit_builder.insert(ast.value.syntax().text_range().start(), "mut ".to_string());
+            edit_builder.insert(ast.value.syntax().text_range().start(), "mut ".to_owned());
         }
         let edit = edit_builder.finish();
         Some(vec![fix(
@@ -448,7 +448,7 @@ fn main(b: bool) {
     &mut x;
 }
 "#,
-            std::iter::once("remove-unnecessary-else".to_string()),
+            std::iter::once("remove-unnecessary-else".to_owned()),
         );
         check_diagnostics_with_disabled(
             r#"
@@ -463,7 +463,7 @@ fn main(b: bool) {
     &mut x;
 }
 "#,
-            std::iter::once("remove-unnecessary-else".to_string()),
+            std::iter::once("remove-unnecessary-else".to_owned()),
         );
     }
 
diff --git a/crates/ide-diagnostics/src/handlers/remove_trailing_return.rs b/crates/ide-diagnostics/src/handlers/remove_trailing_return.rs
index 605e8baba0..a0d5d742d3 100644
--- a/crates/ide-diagnostics/src/handlers/remove_trailing_return.rs
+++ b/crates/ide-diagnostics/src/handlers/remove_trailing_return.rs
@@ -140,7 +140,7 @@ fn foo(x: usize) -> u8 {
     } //^^^^^^^^^ 💡 weak: replace return <expr>; with <expr>
 }
 "#,
-            std::iter::once("remove-unnecessary-else".to_string()),
+            std::iter::once("remove-unnecessary-else".to_owned()),
         );
     }
 
@@ -309,7 +309,7 @@ fn foo(x: usize) -> u8 {
     }
 }
 "#,
-            std::iter::once("remove-unnecessary-else".to_string()),
+            std::iter::once("remove-unnecessary-else".to_owned()),
         );
         check_fix(
             r#"
diff --git a/crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs b/crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs
index 124086c8fa..ae8241ec2c 100644
--- a/crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs
+++ b/crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs
@@ -90,7 +90,7 @@ mod tests {
     use crate::tests::{check_diagnostics, check_diagnostics_with_disabled, check_fix};
 
     fn check_diagnostics_with_needless_return_disabled(ra_fixture: &str) {
-        check_diagnostics_with_disabled(ra_fixture, std::iter::once("needless_return".to_string()));
+        check_diagnostics_with_disabled(ra_fixture, std::iter::once("needless_return".to_owned()));
     }
 
     #[test]
diff --git a/crates/ide-diagnostics/src/handlers/replace_filter_map_next_with_find_map.rs b/crates/ide-diagnostics/src/handlers/replace_filter_map_next_with_find_map.rs
index 72896b891b..6d3dcf31ab 100644
--- a/crates/ide-diagnostics/src/handlers/replace_filter_map_next_with_find_map.rs
+++ b/crates/ide-diagnostics/src/handlers/replace_filter_map_next_with_find_map.rs
@@ -63,8 +63,8 @@ mod tests {
     #[track_caller]
     pub(crate) fn check_diagnostics(ra_fixture: &str) {
         let mut config = DiagnosticsConfig::test_sample();
-        config.disabled.insert("inactive-code".to_string());
-        config.disabled.insert("E0599".to_string());
+        config.disabled.insert("inactive-code".to_owned());
+        config.disabled.insert("E0599".to_owned());
         check_diagnostics_with_config(config, ra_fixture)
     }
 
diff --git a/crates/ide-diagnostics/src/handlers/trait_impl_orphan.rs b/crates/ide-diagnostics/src/handlers/trait_impl_orphan.rs
index d36813381e..78a04e1542 100644
--- a/crates/ide-diagnostics/src/handlers/trait_impl_orphan.rs
+++ b/crates/ide-diagnostics/src/handlers/trait_impl_orphan.rs
@@ -13,7 +13,7 @@ pub(crate) fn trait_impl_orphan(
         ctx,
         DiagnosticCode::RustcHardError("E0117"),
         "only traits defined in the current crate can be implemented for arbitrary types"
-            .to_string(),
+            .to_owned(),
         InFile::new(d.file_id, d.impl_.into()),
     )
     // Not yet checked for false positives
diff --git a/crates/ide-diagnostics/src/handlers/trait_impl_redundant_assoc_item.rs b/crates/ide-diagnostics/src/handlers/trait_impl_redundant_assoc_item.rs
index f58fcd1f7e..00710ef507 100644
--- a/crates/ide-diagnostics/src/handlers/trait_impl_redundant_assoc_item.rs
+++ b/crates/ide-diagnostics/src/handlers/trait_impl_redundant_assoc_item.rs
@@ -103,7 +103,7 @@ fn quickfix_for_redundant_assoc_item(
 
     Some(vec![Assist {
         id: AssistId("add assoc item def into trait def", AssistKind::QuickFix),
-        label: Label::new("Add assoc item def into trait def".to_string()),
+        label: Label::new("Add assoc item def into trait def".to_owned()),
         group: None,
         target: range,
         source_change: Some(source_change_builder.finish()),
diff --git a/crates/ide-diagnostics/src/handlers/type_mismatch.rs b/crates/ide-diagnostics/src/handlers/type_mismatch.rs
index eec8efe785..e93eea8ce2 100644
--- a/crates/ide-diagnostics/src/handlers/type_mismatch.rs
+++ b/crates/ide-diagnostics/src/handlers/type_mismatch.rs
@@ -120,7 +120,7 @@ fn add_missing_ok_or_some(
 
     let mut builder = TextEdit::builder();
     builder.insert(expr.syntax().text_range().start(), format!("{variant_name}("));
-    builder.insert(expr.syntax().text_range().end(), ")".to_string());
+    builder.insert(expr.syntax().text_range().end(), ")".to_owned());
     let source_change =
         SourceChange::from_text_edit(expr_ptr.file_id.original_file(ctx.sema.db), builder.finish());
     let name = format!("Wrap in {variant_name}");
@@ -174,7 +174,7 @@ fn str_ref_to_owned(
     let expr = expr_ptr.value.to_node(&root);
     let expr_range = expr.syntax().text_range();
 
-    let to_owned = ".to_owned()".to_string();
+    let to_owned = ".to_owned()".to_owned();
 
     let edit = TextEdit::insert(expr.syntax().text_range().end(), to_owned);
     let source_change =
@@ -729,7 +729,7 @@ fn f() -> i32 {
 }
 fn g() { return; }
 "#,
-            std::iter::once("needless_return".to_string()),
+            std::iter::once("needless_return".to_owned()),
         );
     }
 
diff --git a/crates/ide-diagnostics/src/handlers/unimplemented_builtin_macro.rs b/crates/ide-diagnostics/src/handlers/unimplemented_builtin_macro.rs
index 996b6eda59..06f176f86f 100644
--- a/crates/ide-diagnostics/src/handlers/unimplemented_builtin_macro.rs
+++ b/crates/ide-diagnostics/src/handlers/unimplemented_builtin_macro.rs
@@ -10,7 +10,7 @@ pub(crate) fn unimplemented_builtin_macro(
     Diagnostic::new_with_syntax_node_ptr(
         ctx,
         DiagnosticCode::Ra("unimplemented-builtin-macro", Severity::WeakWarning),
-        "unimplemented built-in macro".to_string(),
+        "unimplemented built-in macro".to_owned(),
         d.node,
     )
 }
diff --git a/crates/ide-diagnostics/src/handlers/unresolved_field.rs b/crates/ide-diagnostics/src/handlers/unresolved_field.rs
index 0e7a5720d4..65abfd8a29 100644
--- a/crates/ide-diagnostics/src/handlers/unresolved_field.rs
+++ b/crates/ide-diagnostics/src/handlers/unresolved_field.rs
@@ -65,7 +65,7 @@ fn method_fix(
     let FileRange { range, file_id } = ctx.sema.original_range_opt(expr.syntax())?;
     Some(vec![Assist {
         id: AssistId("expected-field-found-method-call-fix", AssistKind::QuickFix),
-        label: Label::new("Use parentheses to call the method".to_string()),
+        label: Label::new("Use parentheses to call the method".to_owned()),
         group: None,
         target: range,
         source_change: Some(SourceChange::from_text_edit(
diff --git a/crates/ide-diagnostics/src/handlers/unresolved_method.rs b/crates/ide-diagnostics/src/handlers/unresolved_method.rs
index 9f8fee67f3..648d081898 100644
--- a/crates/ide-diagnostics/src/handlers/unresolved_method.rs
+++ b/crates/ide-diagnostics/src/handlers/unresolved_method.rs
@@ -101,7 +101,7 @@ fn field_fix(
     };
     Some(Assist {
         id: AssistId("expected-method-found-field-fix", AssistKind::QuickFix),
-        label: Label::new("Use parentheses to call the value of the field".to_string()),
+        label: Label::new("Use parentheses to call the value of the field".to_owned()),
         group: None,
         target: range,
         source_change: Some(SourceChange::from_iter([
diff --git a/crates/ide-diagnostics/src/handlers/unresolved_module.rs b/crates/ide-diagnostics/src/handlers/unresolved_module.rs
index 1604decf90..1155688324 100644
--- a/crates/ide-diagnostics/src/handlers/unresolved_module.rs
+++ b/crates/ide-diagnostics/src/handlers/unresolved_module.rs
@@ -16,7 +16,7 @@ pub(crate) fn unresolved_module(
         ctx,
         DiagnosticCode::RustcHardError("E0583"),
         match &*d.candidates {
-            [] => "unresolved module".to_string(),
+            [] => "unresolved module".to_owned(),
             [candidate] => format!("unresolved module, can't find module file: {candidate}"),
             [candidates @ .., last] => {
                 format!(
@@ -46,7 +46,7 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedModule) -> Option<Vec<
                             anchor: d.decl.file_id.original_file(ctx.sema.db),
                             path: candidate.clone(),
                         },
-                        initial_contents: "".to_string(),
+                        initial_contents: "".to_owned(),
                     }
                     .into(),
                     unresolved_module.syntax().text_range(),
diff --git a/crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs b/crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs
index 340f77feea..7ea50c496f 100644
--- a/crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs
+++ b/crates/ide-diagnostics/src/handlers/unresolved_proc_macro.rs
@@ -27,7 +27,7 @@ pub(crate) fn unresolved_proc_macro(
 
     let not_expanded_message = match &d.macro_name {
         Some(name) => format!("proc macro `{name}` not expanded"),
-        None => "proc macro not expanded".to_string(),
+        None => "proc macro not expanded".to_owned(),
     };
     let severity = if config_enabled { Severity::Error } else { Severity::WeakWarning };
     let def_map = ctx.sema.db.crate_def_map(d.krate);
diff --git a/crates/ide-diagnostics/src/handlers/useless_braces.rs b/crates/ide-diagnostics/src/handlers/useless_braces.rs
index 8dce2af23e..863a7ab783 100644
--- a/crates/ide-diagnostics/src/handlers/useless_braces.rs
+++ b/crates/ide-diagnostics/src/handlers/useless_braces.rs
@@ -40,7 +40,7 @@ pub(crate) fn useless_braces(
         acc.push(
             Diagnostic::new(
                 DiagnosticCode::RustcLint("unused_braces"),
-                "Unnecessary braces in use statement".to_string(),
+                "Unnecessary braces in use statement".to_owned(),
                 FileRange { file_id, range: use_range },
             )
             .with_main_node(InFile::new(file_id.into(), node.clone()))
@@ -112,7 +112,7 @@ mod a {
         );
 
         let mut config = DiagnosticsConfig::test_sample();
-        config.disabled.insert("syntax-error".to_string());
+        config.disabled.insert("syntax-error".to_owned());
         check_diagnostics_with_config(
             config,
             r#"
diff --git a/crates/ide-diagnostics/src/lib.rs b/crates/ide-diagnostics/src/lib.rs
index 7c5cf67330..9d21bb4cd9 100644
--- a/crates/ide-diagnostics/src/lib.rs
+++ b/crates/ide-diagnostics/src/lib.rs
@@ -563,7 +563,7 @@ fn unresolved_fix(id: &'static str, label: &str, target: TextRange) -> Assist {
     assert!(!id.contains(' '));
     Assist {
         id: AssistId(id, AssistKind::QuickFix),
-        label: Label::new(label.to_string()),
+        label: Label::new(label.to_owned()),
         group: None,
         target,
         source_change: None,
diff --git a/crates/ide-diagnostics/src/tests.rs b/crates/ide-diagnostics/src/tests.rs
index da563b874b..b62bb5affd 100644
--- a/crates/ide-diagnostics/src/tests.rs
+++ b/crates/ide-diagnostics/src/tests.rs
@@ -108,7 +108,7 @@ pub(crate) fn check_no_fix(ra_fixture: &str) {
 #[track_caller]
 pub(crate) fn check_diagnostics(ra_fixture: &str) {
     let mut config = DiagnosticsConfig::test_sample();
-    config.disabled.insert("inactive-code".to_string());
+    config.disabled.insert("inactive-code".to_owned());
     check_diagnostics_with_config(config, ra_fixture)
 }
 
@@ -207,8 +207,8 @@ fn minicore_smoke_test() {
         let source = minicore.source_code();
         let mut config = DiagnosticsConfig::test_sample();
         // This should be ignored since we conditionally remove code which creates single item use with braces
-        config.disabled.insert("unused_braces".to_string());
-        config.disabled.insert("unused_variables".to_string());
+        config.disabled.insert("unused_braces".to_owned());
+        config.disabled.insert("unused_variables".to_owned());
         check_diagnostics_with_config(config, &source);
     }