diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv-cli/src/main.rs b/src/tools/rust-analyzer/crates/proc-macro-srv-cli/src/main.rs
index 174f9c524621..7095dac348d6 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv-cli/src/main.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv-cli/src/main.rs
@@ -69,7 +69,7 @@ fn run() -> io::Result<()> {
 
     let write_response = |msg: msg::Response| msg.write(write_json, &mut io::stdout().lock());
 
-    let env = EnvSnapshot::new();
+    let env = EnvSnapshot::default();
     let mut srv = proc_macro_srv::ProcMacroSrv::new(&env);
     let mut buf = String::new();
 
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/lib.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/lib.rs
index 8e78e6f2e079..85833dab1b09 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/lib.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/lib.rs
@@ -13,7 +13,7 @@
 #![cfg(any(feature = "sysroot-abi", rust_analyzer))]
 #![cfg_attr(feature = "in-rust-tree", feature(rustc_private))]
 #![feature(proc_macro_internals, proc_macro_diagnostic, proc_macro_span)]
-#![allow(unreachable_pub, internal_features)]
+#![allow(unreachable_pub, internal_features, clippy::disallowed_types, clippy::print_stderr)]
 
 extern crate proc_macro;
 #[cfg(feature = "in-rust-tree")]
@@ -65,7 +65,7 @@ impl<'env> ProcMacroSrv<'env> {
 
 const EXPANDER_STACK_SIZE: usize = 8 * 1024 * 1024;
 
-impl<'env> ProcMacroSrv<'env> {
+impl ProcMacroSrv<'_> {
     pub fn set_span_mode(&mut self, span_mode: SpanMode) {
         self.span_mode = span_mode;
     }
@@ -248,8 +248,8 @@ pub struct EnvSnapshot {
     vars: HashMap<OsString, OsString>,
 }
 
-impl EnvSnapshot {
-    pub fn new() -> EnvSnapshot {
+impl Default for EnvSnapshot {
+    fn default() -> EnvSnapshot {
         EnvSnapshot { vars: env::vars_os().collect() }
     }
 }
@@ -305,7 +305,7 @@ impl Drop for EnvChange<'_> {
         }
 
         if let Some(dir) = &self.prev_working_dir {
-            if let Err(err) = std::env::set_current_dir(&dir) {
+            if let Err(err) = std::env::set_current_dir(dir) {
                 eprintln!(
                     "Failed to set the current working dir to {}. Error: {:?}",
                     dir.display(),
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/proc_macros.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/proc_macros.rs
index d48c5b30dee6..097b39a3f912 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/proc_macros.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/proc_macros.rs
@@ -13,7 +13,7 @@ pub(crate) struct ProcMacros {
 
 impl From<bridge::PanicMessage> for crate::PanicMessage {
     fn from(p: bridge::PanicMessage) -> Self {
-        Self { message: p.as_str().map(|s| s.to_string()) }
+        Self { message: p.as_str().map(|s| s.to_owned()) }
     }
 }
 
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/rust_analyzer_span.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/rust_analyzer_span.rs
index d508c19dd719..1b535d2a1ccc 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/rust_analyzer_span.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/rust_analyzer_span.rs
@@ -498,7 +498,7 @@ mod tests {
                 })),
                 tt::TokenTree::Leaf(tt::Leaf::Ident(tt::Ident {
                     sym: Symbol::intern("T"),
-                    span: span,
+                    span,
                     is_raw: tt::IdentIsRaw::No,
                 })),
                 tt::TokenTree::Subtree(tt::Subtree {
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/token_stream.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/token_stream.rs
index dbcb5a3143a6..5649e60e0bb1 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/token_stream.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/server_impl/token_stream.rs
@@ -99,7 +99,7 @@ pub(super) struct TokenStreamBuilder<S> {
 }
 
 /// pub(super)lic implementation details for the `TokenStream` type, such as iterators.
-pub(super) mod token_stream {
+pub(super) mod token_stream_impls {
 
     use core::fmt;
 
@@ -137,6 +137,7 @@ pub(super) mod token_stream {
         }
     }
 
+    #[allow(clippy::to_string_trait_impl)]
     impl<S> ToString for TokenStream<S> {
         fn to_string(&self) -> String {
             ::tt::pretty(&self.token_trees)
@@ -150,7 +151,7 @@ impl<S> TokenStreamBuilder<S> {
     }
 
     pub(super) fn push(&mut self, stream: TokenStream<S>) {
-        self.acc.extend(stream.into_iter())
+        self.acc.extend(stream)
     }
 
     pub(super) fn build(self) -> TokenStream<S> {
diff --git a/src/tools/rust-analyzer/crates/proc-macro-srv/src/tests/utils.rs b/src/tools/rust-analyzer/crates/proc-macro-srv/src/tests/utils.rs
index 4f1a18c03fc6..cc5d4a891318 100644
--- a/src/tools/rust-analyzer/crates/proc-macro-srv/src/tests/utils.rs
+++ b/src/tools/rust-analyzer/crates/proc-macro-srv/src/tests/utils.rs
@@ -97,7 +97,7 @@ fn assert_expand_impl(
 
 pub(crate) fn list() -> Vec<String> {
     let dylib_path = proc_macro_test_dylib_path();
-    let env = EnvSnapshot::new();
+    let env = EnvSnapshot::default();
     let mut srv = ProcMacroSrv::new(&env);
     let res = srv.list_macros(&dylib_path).unwrap();
     res.into_iter().map(|(name, kind)| format!("{name} [{kind:?}]")).collect()