diff --git a/proxmox-api-macro/src/api.rs b/proxmox-api-macro/src/api.rs
index ce855fb0..75bd0c58 100644
--- a/proxmox-api-macro/src/api.rs
+++ b/proxmox-api-macro/src/api.rs
@@ -14,7 +14,7 @@ mod enums;
 mod method;
 mod structs;
 
-pub const INTNAMES: &[&'static str] = &[
+pub const INTNAMES: &[&str] = &[
     "Integer", "i8", "i16", "i32", "i64", "isize", "u8", "u16", "u32", "u64", "usize",
 ];
 
@@ -103,7 +103,7 @@ impl Schema {
         self.item.to_schema(
             ts,
             self.description.as_ref(),
-            &self.span,
+            self.span,
             &self.properties,
             true,
         )
@@ -113,7 +113,7 @@ impl Schema {
         self.item.to_schema(
             ts,
             self.description.as_ref(),
-            &self.span,
+            self.span,
             &self.properties,
             false,
         )
@@ -212,10 +212,10 @@ impl SchemaItem {
         &self,
         ts: &mut TokenStream,
         description: Option<&syn::LitStr>,
-        span: &Span,
+        span: Span,
         properties: &[(Ident, syn::Expr)],
     ) -> Result<bool, Error> {
-        let description = description.ok_or_else(|| format_err!(*span, "missing description"));
+        let description = description.ok_or_else(|| format_err!(span, "missing description"));
 
         match self {
             SchemaItem::Null => {
@@ -276,7 +276,7 @@ impl SchemaItem {
         &self,
         ts: &mut TokenStream,
         description: Option<&syn::LitStr>,
-        span: &Span,
+        span: Span,
         properties: &[(Ident, syn::Expr)],
         typed: bool,
     ) -> Result<(), Error> {
diff --git a/proxmox-api-macro/src/api/enums.rs b/proxmox-api-macro/src/api/enums.rs
index 4ffb7a9a..9ac64d6e 100644
--- a/proxmox-api-macro/src/api/enums.rs
+++ b/proxmox-api-macro/src/api/enums.rs
@@ -73,17 +73,14 @@ pub fn handle_enum(
 
             let args: AttrArgs = syn::parse2(attrib.tokens.clone())?;
             for arg in args.args {
-                match arg {
-                    syn::NestedMeta::Meta(syn::Meta::NameValue(var)) => {
-                        if var.path.is_ident("rename") {
-                            match var.lit {
-                                syn::Lit::Str(lit) => variants.push(lit),
-                                _ => bail!(var.lit => "'rename' value must be a string literal"),
-                            }
-                            renamed = true;
+                if let syn::NestedMeta::Meta(syn::Meta::NameValue(var)) = arg {
+                    if var.path.is_ident("rename") {
+                        match var.lit {
+                            syn::Lit::Str(lit) => variants.push(lit),
+                            _ => bail!(var.lit => "'rename' value must be a string literal"),
                         }
+                        renamed = true;
                     }
-                    _ => (), // ignore
                 }
             }
         }
diff --git a/proxmox-api-macro/src/api/method.rs b/proxmox-api-macro/src/api/method.rs
index 6cb32ed7..d86b7bba 100644
--- a/proxmox-api-macro/src/api/method.rs
+++ b/proxmox-api-macro/src/api/method.rs
@@ -62,13 +62,10 @@ pub fn handle_method(mut attribs: JSONObject, mut func: syn::ItemFn) -> Result<T
 
     let returns_schema = {
         let mut ts = TokenStream::new();
-        match returns_schema {
-            Some(schema) => {
-                let mut inner = TokenStream::new();
-                schema.to_schema(&mut inner)?;
-                ts.extend(quote! { .returns(#inner) });
-            }
-            None => (),
+        if let Some(schema) = returns_schema {
+            let mut inner = TokenStream::new();
+            schema.to_schema(&mut inner)?;
+            ts.extend(quote! { .returns(#inner) });
         }
         ts
     };
@@ -247,12 +244,10 @@ fn handle_function_signature(
         let param_type = if let Some((name, optional, schema)) =
             input_schema.find_obj_property_by_ident(&pat.ident.to_string())
         {
-            match schema {
-                PropertySchema::Schema(schema) => match &schema.item {
-                    SchemaItem::Inferred(span) => bail!(*span, "failed to infer type"),
-                    _ => (),
-                },
-                _ => (),
+            if let PropertySchema::Schema(schema) = schema {
+                if let SchemaItem::Inferred(span) = &schema.item {
+                    bail!(*span, "failed to infer type");
+                }
             }
             param_name = name.clone();
             // Found an explicit parameter: extract it:
@@ -426,5 +421,5 @@ fn create_wrapper_function(
         }
     });
 
-    return Ok(api_func_name);
+    Ok(api_func_name)
 }
diff --git a/proxmox-api-macro/src/util.rs b/proxmox-api-macro/src/util.rs
index d00d8d01..8d1579fe 100644
--- a/proxmox-api-macro/src/util.rs
+++ b/proxmox-api-macro/src/util.rs
@@ -116,6 +116,8 @@ impl Parse for FieldName {
 /// Most of our schema definition consists of a json-like notation.
 /// For parsing we mostly just need to destinguish between objects and non-objects.
 /// For specific expression types we match on the contained expression later on.
+// FIXME: Expr(Box<syn::Expr>)
+#[allow(clippy::large_enum_variant)]
 pub enum JSONValue {
     Object(JSONObject),
     Expr(syn::Expr),
@@ -283,7 +285,7 @@ impl JSONObject {
             input.parse_terminated(JSONMapEntry::parse)?;
         let mut elems = HashMap::with_capacity(map_elems.len());
         for c in map_elems {
-            if elems.insert(c.key.clone().into(), c.value).is_some() {
+            if elems.insert(c.key.clone(), c.value).is_some() {
                 bail!(c.key.span(), "duplicate '{}' in schema", c.key.as_str());
             }
         }