diff --git a/README.md b/README.md
index 4e6558b..e91b1bd 100644
--- a/README.md
+++ b/README.md
@@ -221,14 +221,12 @@ pub enum MyEnum {
     StructVariant { floats: Vec<f32> },
 }
 
-fn main() {
-    let schema = schema_for_value!(MyStruct {
-        my_int: 123,
-        my_bool: true,
-        my_nullable_enum: Some(MyEnum::StringNewType("foo".to_string()))
-    });
-    println!("{}", serde_json::to_string_pretty(&schema).unwrap());
-}
+let schema = schema_for_value!(MyStruct {
+    my_int: 123,
+    my_bool: true,
+    my_nullable_enum: Some(MyEnum::StringNewType("foo".to_string()))
+});
+println!("{}", serde_json::to_string_pretty(&schema).unwrap());
 ```
 
 <details>
diff --git a/schemars/src/json_schema_impls/core.rs b/schemars/src/json_schema_impls/core.rs
index 9d5fee0..5cefbdd 100644
--- a/schemars/src/json_schema_impls/core.rs
+++ b/schemars/src/json_schema_impls/core.rs
@@ -88,15 +88,19 @@ impl<T: JsonSchema, E: JsonSchema> JsonSchema for Result<T, E> {
     }
 
     fn json_schema(gen: &mut SchemaGenerator) -> Schema {
-        let mut ok_schema = SchemaObject::default();
-        ok_schema.instance_type = Some(InstanceType::Object.into());
+        let mut ok_schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
         let obj = ok_schema.object();
         obj.required.insert("Ok".to_owned());
         obj.properties
             .insert("Ok".to_owned(), gen.subschema_for::<T>());
 
-        let mut err_schema = SchemaObject::default();
-        err_schema.instance_type = Some(InstanceType::Object.into());
+        let mut err_schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
         let obj = err_schema.object();
         obj.required.insert("Err".to_owned());
         obj.properties
@@ -114,31 +118,29 @@ impl<T: JsonSchema> JsonSchema for Bound<T> {
     }
 
     fn json_schema(gen: &mut SchemaGenerator) -> Schema {
-        let mut included_schema = SchemaObject::default();
-        included_schema.instance_type = Some(InstanceType::Object.into());
-        included_schema
-            .object()
-            .required
-            .insert("Included".to_owned());
-        included_schema
-            .object()
-            .properties
+        let mut included_schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
+        let obj = included_schema.object();
+        obj.required.insert("Included".to_owned());
+        obj.properties
             .insert("Included".to_owned(), gen.subschema_for::<T>());
 
-        let mut excluded_schema = SchemaObject::default();
-        excluded_schema.instance_type = Some(InstanceType::Object.into());
-        excluded_schema
-            .object()
-            .required
-            .insert("Excluded".to_owned());
-        excluded_schema
-            .object()
-            .properties
+        let mut excluded_schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
+        let obj = excluded_schema.object();
+        obj.required.insert("Excluded".to_owned());
+        obj.properties
             .insert("Excluded".to_owned(), gen.subschema_for::<T>());
 
-        let mut unbounded_schema = SchemaObject::default();
-        unbounded_schema.instance_type = Some(InstanceType::String.into());
-        unbounded_schema.const_value = Some(json!("Unbounded"));
+        let unbounded_schema = SchemaObject {
+            instance_type: Some(InstanceType::String.into()),
+            const_value: Some(json!("Unbounded")),
+            ..Default::default()
+        };
 
         let mut schema = SchemaObject::default();
         schema.subschemas().one_of = Some(vec![
@@ -156,8 +158,10 @@ impl<T: JsonSchema> JsonSchema for Range<T> {
     }
 
     fn json_schema(gen: &mut SchemaGenerator) -> Schema {
-        let mut schema = SchemaObject::default();
-        schema.instance_type = Some(InstanceType::Object.into());
+        let mut schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
         let obj = schema.object();
         obj.required.insert("start".to_owned());
         obj.required.insert("end".to_owned());
diff --git a/schemars/src/json_schema_impls/ffi.rs b/schemars/src/json_schema_impls/ffi.rs
index b5b6118..5ce10d7 100644
--- a/schemars/src/json_schema_impls/ffi.rs
+++ b/schemars/src/json_schema_impls/ffi.rs
@@ -9,20 +9,22 @@ impl JsonSchema for OsString {
     }
 
     fn json_schema(gen: &mut SchemaGenerator) -> Schema {
-        let mut unix_schema = SchemaObject::default();
-        unix_schema.instance_type = Some(InstanceType::Object.into());
-        unix_schema.object().required.insert("Unix".to_owned());
-        unix_schema
-            .object()
-            .properties
+        let mut unix_schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
+        let obj = unix_schema.object();
+        obj.required.insert("Unix".to_owned());
+        obj.properties
             .insert("Unix".to_owned(), <Vec<u8>>::json_schema(gen));
 
-        let mut win_schema = SchemaObject::default();
-        win_schema.instance_type = Some(InstanceType::Object.into());
-        win_schema.object().required.insert("Windows".to_owned());
-        win_schema
-            .object()
-            .properties
+        let mut win_schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
+        let obj = win_schema.object();
+        obj.required.insert("Windows".to_owned());
+        obj.properties
             .insert("Windows".to_owned(), <Vec<u16>>::json_schema(gen));
 
         let mut schema = SchemaObject::default();
diff --git a/schemars/src/json_schema_impls/time.rs b/schemars/src/json_schema_impls/time.rs
index 9133186..f4362ee 100644
--- a/schemars/src/json_schema_impls/time.rs
+++ b/schemars/src/json_schema_impls/time.rs
@@ -9,8 +9,10 @@ impl JsonSchema for Duration {
     }
 
     fn json_schema(gen: &mut SchemaGenerator) -> Schema {
-        let mut schema = SchemaObject::default();
-        schema.instance_type = Some(InstanceType::Object.into());
+        let mut schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
         let obj = schema.object();
         obj.required.insert("secs".to_owned());
         obj.required.insert("nanos".to_owned());
@@ -28,8 +30,10 @@ impl JsonSchema for SystemTime {
     }
 
     fn json_schema(gen: &mut SchemaGenerator) -> Schema {
-        let mut schema = SchemaObject::default();
-        schema.instance_type = Some(InstanceType::Object.into());
+        let mut schema = SchemaObject {
+            instance_type: Some(InstanceType::Object.into()),
+            ..Default::default()
+        };
         let obj = schema.object();
         obj.required.insert("secs_since_epoch".to_owned());
         obj.required.insert("nanos_since_epoch".to_owned());
diff --git a/schemars/src/lib.rs b/schemars/src/lib.rs
index 711a2d5..eb6d5ac 100644
--- a/schemars/src/lib.rs
+++ b/schemars/src/lib.rs
@@ -216,14 +216,12 @@ pub enum MyEnum {
     StructVariant { floats: Vec<f32> },
 }
 
-fn main() {
-    let schema = schema_for_value!(MyStruct {
-        my_int: 123,
-        my_bool: true,
-        my_nullable_enum: Some(MyEnum::StringNewType("foo".to_string()))
-    });
-    println!("{}", serde_json::to_string_pretty(&schema).unwrap());
-}
+let schema = schema_for_value!(MyStruct {
+    my_int: 123,
+    my_bool: true,
+    my_nullable_enum: Some(MyEnum::StringNewType("foo".to_string()))
+});
+println!("{}", serde_json::to_string_pretty(&schema).unwrap());
 ```
 
 <details>
diff --git a/schemars_derive/src/lib.rs b/schemars_derive/src/lib.rs
index fbe69d4..c81eb40 100644
--- a/schemars_derive/src/lib.rs
+++ b/schemars_derive/src/lib.rs
@@ -143,7 +143,7 @@ fn add_trait_bounds(generics: &mut syn::Generics) {
     }
 }
 
-fn compile_error<'a>(errors: Vec<syn::Error>) -> TokenStream {
+fn compile_error(errors: Vec<syn::Error>) -> TokenStream {
     let compile_errors = errors.iter().map(syn::Error::to_compile_error);
     quote! {
         #(#compile_errors)*
diff --git a/schemars_derive/src/metadata.rs b/schemars_derive/src/metadata.rs
index cdbe22d..2036571 100644
--- a/schemars_derive/src/metadata.rs
+++ b/schemars_derive/src/metadata.rs
@@ -35,8 +35,8 @@ impl ToTokens for SchemaMetadata<'_> {
 impl<'a> SchemaMetadata<'a> {
     pub fn from_attrs(attrs: &'a Attrs) -> Self {
         SchemaMetadata {
-            title: attrs.title.as_ref().and_then(none_if_empty),
-            description: attrs.description.as_ref().and_then(none_if_empty),
+            title: attrs.title.as_deref().and_then(none_if_empty),
+            description: attrs.description.as_deref().and_then(none_if_empty),
             deprecated: attrs.deprecated,
             examples: &attrs.examples,
             read_only: false,
@@ -106,7 +106,7 @@ impl<'a> SchemaMetadata<'a> {
     }
 }
 
-fn none_if_empty(s: &String) -> Option<&str> {
+fn none_if_empty(s: &str) -> Option<&str> {
     if s.is_empty() {
         None
     } else {