diff --git a/bindgen-integration/build.rs b/bindgen-integration/build.rs
index c712569816..583f46ea93 100644
--- a/bindgen-integration/build.rs
+++ b/bindgen-integration/build.rs
@@ -183,7 +183,7 @@ fn setup_macro_test() {
     let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
     let out_rust_file = out_path.join("test.rs");
     let out_rust_file_relative = out_rust_file
-        .strip_prefix(std::env::current_dir().unwrap().parent().unwrap())
+        .strip_prefix(env::current_dir().unwrap().parent().unwrap())
         .unwrap();
     let out_dep_file = out_path.join("test.d");
 
diff --git a/bindgen-tests/tests/tests.rs b/bindgen-tests/tests/tests.rs
index bbe7eb2e24..abb5f96953 100644
--- a/bindgen-tests/tests/tests.rs
+++ b/bindgen-tests/tests/tests.rs
@@ -371,7 +371,7 @@ include!(concat!(env!("OUT_DIR"), "/tests.rs"));
 #[test]
 #[cfg_attr(target_os = "windows", ignore)]
 fn test_clang_env_args() {
-    std::env::set_var(
+    env::set_var(
         "BINDGEN_EXTRA_CLANG_ARGS",
         "-D_ENV_ONE=1 -D_ENV_TWO=\"2 -DNOT_THREE=1\"",
     );
@@ -653,8 +653,8 @@ fn emit_depfile() {
         builder.into_builder(check_roundtrip).unwrap();
     let _bindings = builder.generate().unwrap();
 
-    let observed = std::fs::read_to_string(observed_depfile).unwrap();
-    let expected = std::fs::read_to_string(expected_depfile).unwrap();
+    let observed = fs::read_to_string(observed_depfile).unwrap();
+    let expected = fs::read_to_string(expected_depfile).unwrap();
     assert_eq!(observed.trim(), expected.trim());
 }
 
@@ -694,7 +694,7 @@ fn dump_preprocessed_input() {
     );
 }
 
-fn build_flags_output_helper(builder: &bindgen::Builder) {
+fn build_flags_output_helper(builder: &Builder) {
     let mut command_line_flags = builder.command_line_flags();
     command_line_flags.insert(0, "bindgen".to_string());
 
@@ -712,7 +712,7 @@ fn build_flags_output_helper(builder: &bindgen::Builder) {
 
 #[test]
 fn commandline_multiple_headers() {
-    let bindings = bindgen::Builder::default()
+    let bindings = Builder::default()
         .header("tests/headers/char.h")
         .header("tests/headers/func_ptr.h")
         .header("tests/headers/16-byte-alignment.h");
diff --git a/bindgen/build.rs b/bindgen/build.rs
index 8407ceae8f..4fb2d3075e 100644
--- a/bindgen/build.rs
+++ b/bindgen/build.rs
@@ -20,10 +20,10 @@ fn main() {
     println!("cargo:rerun-if-env-changed=BINDGEN_EXTRA_CLANG_ARGS");
     println!(
         "cargo:rerun-if-env-changed=BINDGEN_EXTRA_CLANG_ARGS_{}",
-        std::env::var("TARGET").unwrap()
+        env::var("TARGET").unwrap()
     );
     println!(
         "cargo:rerun-if-env-changed=BINDGEN_EXTRA_CLANG_ARGS_{}",
-        std::env::var("TARGET").unwrap().replace('-', "_")
+        env::var("TARGET").unwrap().replace('-', "_")
     );
 }
diff --git a/bindgen/clang.rs b/bindgen/clang.rs
index bca4a80978..327ec137b0 100644
--- a/bindgen/clang.rs
+++ b/bindgen/clang.rs
@@ -961,13 +961,11 @@ impl Cursor {
     ///
     /// Returns None if the cursor does not include a file, otherwise the file's full name
     pub(crate) fn get_included_file_name(&self) -> Option<String> {
-        let file = unsafe { clang_sys::clang_getIncludedFile(self.x) };
+        let file = unsafe { clang_getIncludedFile(self.x) };
         if file.is_null() {
             None
         } else {
-            Some(unsafe {
-                cxstring_into_string(clang_sys::clang_getFileName(file))
-            })
+            Some(unsafe { cxstring_into_string(clang_getFileName(file)) })
         }
     }
 
diff --git a/bindgen/codegen/dyngen.rs b/bindgen/codegen/dyngen.rs
index e75e11a297..6bdea51eff 100644
--- a/bindgen/codegen/dyngen.rs
+++ b/bindgen/codegen/dyngen.rs
@@ -14,7 +14,7 @@ pub(crate) struct DynamicItems {
     ///    ...
     /// }
     /// ```
-    struct_members: Vec<proc_macro2::TokenStream>,
+    struct_members: Vec<TokenStream>,
 
     /// Tracks the tokens that will appear inside the library struct's implementation, e.g.:
     ///
@@ -26,7 +26,7 @@ pub(crate) struct DynamicItems {
     ///     }
     /// }
     /// ```
-    struct_implementation: Vec<proc_macro2::TokenStream>,
+    struct_implementation: Vec<TokenStream>,
 
     /// Tracks the initialization of the fields inside the `::new` constructor of the library
     /// struct, e.g.:
@@ -45,7 +45,7 @@ pub(crate) struct DynamicItems {
     ///     ...
     /// }
     /// ```
-    constructor_inits: Vec<proc_macro2::TokenStream>,
+    constructor_inits: Vec<TokenStream>,
 
     /// Tracks the information that is passed to the library struct at the end of the `::new`
     /// constructor, e.g.:
@@ -65,7 +65,7 @@ pub(crate) struct DynamicItems {
     ///     }
     /// }
     /// ```
-    init_fields: Vec<proc_macro2::TokenStream>,
+    init_fields: Vec<TokenStream>,
 }
 
 impl DynamicItems {
@@ -77,7 +77,7 @@ impl DynamicItems {
         &self,
         lib_ident: Ident,
         ctx: &BindgenContext,
-    ) -> proc_macro2::TokenStream {
+    ) -> TokenStream {
         let struct_members = &self.struct_members;
         let constructor_inits = &self.constructor_inits;
         let init_fields = &self.init_fields;
@@ -134,11 +134,11 @@ impl DynamicItems {
         abi: ClangAbi,
         is_variadic: bool,
         is_required: bool,
-        args: Vec<proc_macro2::TokenStream>,
-        args_identifiers: Vec<proc_macro2::TokenStream>,
-        ret: proc_macro2::TokenStream,
-        ret_ty: proc_macro2::TokenStream,
-        attributes: Vec<proc_macro2::TokenStream>,
+        args: Vec<TokenStream>,
+        args_identifiers: Vec<TokenStream>,
+        ret: TokenStream,
+        ret_ty: TokenStream,
+        attributes: Vec<TokenStream>,
         ctx: &BindgenContext,
     ) {
         if !is_variadic {
diff --git a/bindgen/codegen/mod.rs b/bindgen/codegen/mod.rs
index c58237c17b..f60a75d23a 100644
--- a/bindgen/codegen/mod.rs
+++ b/bindgen/codegen/mod.rs
@@ -3180,7 +3180,7 @@ impl fmt::Display for EnumVariation {
     }
 }
 
-impl std::str::FromStr for EnumVariation {
+impl FromStr for EnumVariation {
     type Err = std::io::Error;
 
     /// Create a `EnumVariation` from a string.
@@ -3886,7 +3886,7 @@ impl fmt::Display for MacroTypeVariation {
     }
 }
 
-impl std::str::FromStr for MacroTypeVariation {
+impl FromStr for MacroTypeVariation {
     type Err = std::io::Error;
 
     /// Create a `MacroTypeVariation` from a string.
@@ -3929,7 +3929,7 @@ impl fmt::Display for AliasVariation {
     }
 }
 
-impl std::str::FromStr for AliasVariation {
+impl FromStr for AliasVariation {
     type Err = std::io::Error;
 
     /// Create an `AliasVariation` from a string.
@@ -3978,7 +3978,7 @@ impl Default for NonCopyUnionStyle {
     }
 }
 
-impl std::str::FromStr for NonCopyUnionStyle {
+impl FromStr for NonCopyUnionStyle {
     type Err = std::io::Error;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
@@ -4096,7 +4096,7 @@ where
             if let Ok(layout) = self.try_get_layout(ctx, extra) {
                 Ok(helpers::blob(layout))
             } else {
-                Err(error::Error::NoLayoutForOpaqueBlob)
+                Err(Error::NoLayoutForOpaqueBlob)
             }
         })
     }
@@ -4207,7 +4207,7 @@ impl TryToOpaque for Type {
         ctx: &BindgenContext,
         _: &Item,
     ) -> error::Result<Layout> {
-        self.layout(ctx).ok_or(error::Error::NoLayoutForOpaqueBlob)
+        self.layout(ctx).ok_or(Error::NoLayoutForOpaqueBlob)
     }
 }
 
@@ -4365,7 +4365,7 @@ impl TryToOpaque for TemplateInstantiation {
     ) -> error::Result<Layout> {
         item.expect_type()
             .layout(ctx)
-            .ok_or(error::Error::NoLayoutForOpaqueBlob)
+            .ok_or(Error::NoLayoutForOpaqueBlob)
     }
 }
 
@@ -4378,7 +4378,7 @@ impl TryToRustTy for TemplateInstantiation {
         item: &Item,
     ) -> error::Result<syn::Type> {
         if self.is_opaque(ctx, item) {
-            return Err(error::Error::InstantiationOfOpaqueType);
+            return Err(Error::InstantiationOfOpaqueType);
         }
 
         let def = self
@@ -4400,7 +4400,7 @@ impl TryToRustTy for TemplateInstantiation {
             // template specialization, and we've hit an instantiation of
             // that partial specialization.
             extra_assert!(def.is_opaque(ctx, &()));
-            return Err(error::Error::InstantiationOfOpaqueType);
+            return Err(Error::InstantiationOfOpaqueType);
         }
 
         // TODO: If the definition type is a template class/struct
@@ -4452,7 +4452,7 @@ impl TryToRustTy for FunctionSig {
                 syn::parse_quote! { unsafe extern #abi fn ( #( #arguments ),* ) #ret },
             ),
             Err(err) => {
-                if matches!(err, error::Error::UnsupportedAbi(_)) {
+                if matches!(err, Error::UnsupportedAbi(_)) {
                     unsupported_abi_diagnostic(
                         self.name(),
                         self.is_variadic(),
@@ -4568,7 +4568,7 @@ impl CodeGenerator for Function {
 
         let abi = match signature.abi(ctx, Some(name)) {
             Err(err) => {
-                if matches!(err, error::Error::UnsupportedAbi(_)) {
+                if matches!(err, Error::UnsupportedAbi(_)) {
                     unsupported_abi_diagnostic(
                         name,
                         signature.is_variadic(),
@@ -4709,7 +4709,7 @@ fn unsupported_abi_diagnostic(
     variadic: bool,
     location: Option<&crate::clang::SourceLocation>,
     ctx: &BindgenContext,
-    error: &error::Error,
+    error: &Error,
 ) {
     warn!(
         "Skipping {}function `{fn_name}` because the {error}",
@@ -5676,7 +5676,7 @@ pub(crate) mod utils {
 
     pub(crate) fn fnsig_arguments_iter<
         'a,
-        I: Iterator<Item = &'a (Option<String>, crate::ir::context::TypeId)>,
+        I: Iterator<Item = &'a (Option<String>, TypeId)>,
     >(
         ctx: &BindgenContext,
         args_iter: I,
diff --git a/bindgen/ir/comment.rs b/bindgen/ir/comment.rs
index 03fc76ff98..a4ba320186 100644
--- a/bindgen/ir/comment.rs
+++ b/bindgen/ir/comment.rs
@@ -13,7 +13,7 @@ enum Kind {
 
 /// Preprocesses a C/C++ comment so that it is a valid Rust comment.
 pub(crate) fn preprocess(comment: &str) -> String {
-    match self::kind(comment) {
+    match kind(comment) {
         Some(Kind::SingleLines) => preprocess_single_lines(comment),
         Some(Kind::MultiLine) => preprocess_multi_line(comment),
         None => comment.to_owned(),
diff --git a/bindgen/ir/comp.rs b/bindgen/ir/comp.rs
index 68884bd20a..093d553ad0 100644
--- a/bindgen/ir/comp.rs
+++ b/bindgen/ir/comp.rs
@@ -1473,8 +1473,7 @@ impl CompInfo {
                         ty: type_id,
                         kind,
                         field_name,
-                        is_pub: cur.access_specifier() ==
-                            clang_sys::CX_CXXPublic,
+                        is_pub: cur.access_specifier() == CX_CXXPublic,
                     });
                 }
                 CXCursor_Constructor | CXCursor_Destructor |
diff --git a/bindgen/ir/context.rs b/bindgen/ir/context.rs
index d8bcaba1d4..6cdf8b4af8 100644
--- a/bindgen/ir/context.rs
+++ b/bindgen/ir/context.rs
@@ -319,7 +319,7 @@ pub(crate) struct BindgenContext {
 
     /// Maps from a cursor to the item ID of the named template type parameter
     /// for that cursor.
-    type_params: HashMap<clang::Cursor, TypeId>,
+    type_params: HashMap<Cursor, TypeId>,
 
     /// A cursor to module map. Similar reason than above.
     modules: HashMap<Cursor, ModuleId>,
@@ -336,7 +336,7 @@ pub(crate) struct BindgenContext {
     /// This is used to handle the cases where the semantic and the lexical
     /// parents of the cursor differ, like when a nested class is defined
     /// outside of the parent class.
-    semantic_parents: HashMap<clang::Cursor, ItemId>,
+    semantic_parents: HashMap<Cursor, ItemId>,
 
     /// A stack with the current type declarations and types we're parsing. This
     /// is needed to avoid infinite recursion when parsing a type like:
@@ -810,11 +810,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
     }
 
     /// Add a new named template type parameter to this context's item set.
-    pub(crate) fn add_type_param(
-        &mut self,
-        item: Item,
-        definition: clang::Cursor,
-    ) {
+    pub(crate) fn add_type_param(&mut self, item: Item, definition: Cursor) {
         debug!("BindgenContext::add_type_param: item = {item:?}; definition = {definition:?}");
 
         assert!(
@@ -846,10 +842,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
 
     /// Get the named type defined at the given cursor location, if we've
     /// already added one.
-    pub(crate) fn get_type_param(
-        &self,
-        definition: &clang::Cursor,
-    ) -> Option<TypeId> {
+    pub(crate) fn get_type_param(&self, definition: &Cursor) -> Option<TypeId> {
         assert_eq!(
             definition.kind(),
             clang_sys::CXCursor_TemplateTypeParameter
@@ -923,7 +916,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
     /// Gather all the unresolved type references.
     fn collect_typerefs(
         &mut self,
-    ) -> Vec<(ItemId, clang::Type, clang::Cursor, Option<ItemId>)> {
+    ) -> Vec<(ItemId, clang::Type, Cursor, Option<ItemId>)> {
         debug_assert!(!self.collected_typerefs);
         self.collected_typerefs = true;
         let mut typerefs = vec![];
@@ -1517,7 +1510,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
     /// not sure it's worth it.
     pub(crate) fn add_semantic_parent(
         &mut self,
-        definition: clang::Cursor,
+        definition: Cursor,
         parent_id: ItemId,
     ) {
         self.semantic_parents.insert(definition, parent_id);
@@ -1526,7 +1519,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
     /// Returns a known semantic parent for a given definition.
     pub(crate) fn known_semantic_parent(
         &self,
-        definition: clang::Cursor,
+        definition: Cursor,
     ) -> Option<ItemId> {
         self.semantic_parents.get(&definition).copied()
     }
@@ -1631,7 +1624,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
         with_id: ItemId,
         template: TypeId,
         ty: &clang::Type,
-        location: clang::Cursor,
+        location: Cursor,
     ) -> Option<TypeId> {
         let num_expected_args =
             self.resolve_type(template).num_self_template_params(self);
@@ -1856,7 +1849,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
         with_id: ItemId,
         parent_id: Option<ItemId>,
         ty: &clang::Type,
-        location: Option<clang::Cursor>,
+        location: Option<Cursor>,
     ) -> Option<TypeId> {
         use clang_sys::{CXCursor_TypeAliasTemplateDecl, CXCursor_TypeRef};
         debug!("builtin_or_resolved_ty: {ty:?}, {location:?}, {with_id:?}, {parent_id:?}");
@@ -2227,7 +2220,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
     /// namespace.
     fn tokenize_namespace(
         &self,
-        cursor: &clang::Cursor,
+        cursor: &Cursor,
     ) -> (Option<String>, ModuleKind) {
         assert_eq!(
             cursor.kind(),
@@ -2306,7 +2299,7 @@ If you encounter an error missing from this list, please file an issue or a PR!"
 
     /// Given a CXCursor_Namespace cursor, return the item ID of the
     /// corresponding module, or create one on the fly.
-    pub(crate) fn module(&mut self, cursor: clang::Cursor) -> ModuleId {
+    pub(crate) fn module(&mut self, cursor: Cursor) -> ModuleId {
         use clang_sys::*;
         assert_eq!(cursor.kind(), CXCursor_Namespace, "Be a nice person");
         let cursor = cursor.canonical();
diff --git a/bindgen/ir/dot.rs b/bindgen/ir/dot.rs
index 9b81b8749c..0ccee42c0d 100644
--- a/bindgen/ir/dot.rs
+++ b/bindgen/ir/dot.rs
@@ -17,7 +17,7 @@ pub(crate) trait DotAttributes {
         out: &mut W,
     ) -> io::Result<()>
     where
-        W: io::Write;
+        W: Write;
 }
 
 /// Write a graphviz dot file containing our IR.
diff --git a/bindgen/ir/item.rs b/bindgen/ir/item.rs
index ee0fdc525b..1157149529 100644
--- a/bindgen/ir/item.rs
+++ b/bindgen/ir/item.rs
@@ -1563,8 +1563,8 @@ impl Item {
              \tlocation = {location:?}",
         );
 
-        if ty.kind() == clang_sys::CXType_Unexposed ||
-            location.cur_type().kind() == clang_sys::CXType_Unexposed
+        if ty.kind() == CXType_Unexposed ||
+            location.cur_type().kind() == CXType_Unexposed
         {
             if ty.is_associated_type() ||
                 location.cur_type().is_associated_type()
diff --git a/bindgen/ir/layout.rs b/bindgen/ir/layout.rs
index fc248e1dfa..905e47c732 100644
--- a/bindgen/ir/layout.rs
+++ b/bindgen/ir/layout.rs
@@ -19,9 +19,8 @@ pub(crate) struct Layout {
 
 #[test]
 fn test_layout_for_size() {
-    use std::mem;
-
-    let ptr_size = mem::size_of::<*mut ()>();
+    use std::mem::size_of;
+    let ptr_size = size_of::<*mut ()>();
     assert_eq!(
         Layout::for_size_internal(ptr_size, ptr_size),
         Layout::new(ptr_size, ptr_size)
diff --git a/bindgen/ir/ty.rs b/bindgen/ir/ty.rs
index fc3bfa6088..5aea619808 100644
--- a/bindgen/ir/ty.rs
+++ b/bindgen/ir/ty.rs
@@ -637,12 +637,7 @@ pub(crate) enum TypeKind {
     /// already known types, and are converted to ResolvedTypeRef.
     ///
     /// see tests/headers/typeref.hpp to see somewhere where this is a problem.
-    UnresolvedTypeRef(
-        clang::Type,
-        clang::Cursor,
-        /* parent_id */
-        Option<ItemId>,
-    ),
+    UnresolvedTypeRef(clang::Type, Cursor, /* parent_id */ Option<ItemId>),
 
     /// An indirection to another type.
     ///
diff --git a/bindgen/ir/var.rs b/bindgen/ir/var.rs
index 2aa92f84bd..8f9aa4441c 100644
--- a/bindgen/ir/var.rs
+++ b/bindgen/ir/var.rs
@@ -477,7 +477,7 @@ fn get_integer_literal_from_cursor(cursor: &clang::Cursor) -> Option<i64> {
 
 fn duplicated_macro_diagnostic(
     macro_name: &str,
-    _location: crate::clang::SourceLocation,
+    _location: clang::SourceLocation,
     _ctx: &BindgenContext,
 ) {
     warn!("Duplicated macro definition: {macro_name}");
diff --git a/bindgen/lib.rs b/bindgen/lib.rs
index e599f759c7..5bc325ed0d 100644
--- a/bindgen/lib.rs
+++ b/bindgen/lib.rs
@@ -70,6 +70,7 @@ use std::env;
 use std::ffi::OsStr;
 use std::fs::{File, OpenOptions};
 use std::io::{self, Write};
+use std::mem::size_of;
 use std::path::{Path, PathBuf};
 use std::process::{Command, Stdio};
 use std::rc::Rc;
@@ -888,7 +889,7 @@ impl Bindings {
         if is_host_build {
             debug_assert_eq!(
                 context.target_pointer_size(),
-                std::mem::size_of::<*mut ()>(),
+                size_of::<*mut ()>(),
                 "{effective_target:?} {HOST_TARGET:?}"
             );
         }
@@ -1184,11 +1185,11 @@ pub fn clang_version() -> ClangVersion {
 fn env_var<K: AsRef<str> + AsRef<OsStr>>(
     parse_callbacks: &[Rc<dyn callbacks::ParseCallbacks>],
     key: K,
-) -> Result<String, std::env::VarError> {
+) -> Result<String, env::VarError> {
     for callback in parse_callbacks {
         callback.read_env_var(key.as_ref());
     }
-    std::env::var(key)
+    env::var(key)
 }
 
 /// Looks for the env var `var_${TARGET}`, and falls back to just `var` when it is not found.
@@ -1281,7 +1282,7 @@ impl callbacks::ParseCallbacks for CargoCallbacks {
 #[test]
 fn commandline_flag_unit_test_function() {
     //Test 1
-    let bindings = crate::builder();
+    let bindings = builder();
     let command_line_flags = bindings.command_line_flags();
 
     let test_cases = [
@@ -1297,7 +1298,7 @@ fn commandline_flag_unit_test_function() {
     assert!(test_cases.iter().all(|x| command_line_flags.contains(x)));
 
     //Test 2
-    let bindings = crate::builder()
+    let bindings = builder()
         .header("input_header")
         .allowlist_type("Distinct_Type")
         .allowlist_function("safe_function");
diff --git a/bindgen/options/cli.rs b/bindgen/options/cli.rs
index 834c7c7625..0bfb290d35 100644
--- a/bindgen/options/cli.rs
+++ b/bindgen/options/cli.rs
@@ -1,3 +1,5 @@
+#![allow(unused_qualifications)] // Clap somehow generates a lot of these
+
 use crate::{
     builder,
     callbacks::{
@@ -810,7 +812,7 @@ where
                     shell,
                     &mut BindgenCommand::command(),
                     "bindgen",
-                    &mut std::io::stdout(),
+                    &mut io::stdout(),
                 );
 
                 exit(0)