diff --git a/okapi-operation-macro/CHANGELOG.md b/okapi-operation-macro/CHANGELOG.md
index fea21ba..e678b9e 100644
--- a/okapi-operation-macro/CHANGELOG.md
+++ b/okapi-operation-macro/CHANGELOG.md
@@ -7,7 +7,8 @@ This project follows the [Semantic Versioning standard](https://semver.org/).
 ### Added
  - Feature `axum` for enable axum-specific functionality;
  - Request body detection from function arguments for specific frameworks (i.e. axum);
- - `#[body]` attribute as replacement for `#[request_body]` (now considered deprecated). 
+ - `#[body]` attribute as replacement for `#[request_body]` (now considered deprecated);
+ - Updates `syn` crate to version 2.
 
 
 ## [0.1.4] - 2024-07-18
diff --git a/okapi-operation-macro/Cargo.toml b/okapi-operation-macro/Cargo.toml
index a071647..aa9314d 100644
--- a/okapi-operation-macro/Cargo.toml
+++ b/okapi-operation-macro/Cargo.toml
@@ -14,8 +14,7 @@ repository = "https://github.com/Flowneee/okapi-operation"
 proc-macro = true
 
 [dependencies]
-
-darling = "0.20.10"
+darling = "0.20"
 lazy_static = "1"
 proc-macro2 = "1"
 quote = "1"
@@ -24,3 +23,6 @@ thiserror = "1"
 
 [features]
 axum = []
+
+[dev-dependencies]
+assert_matches = "1"
diff --git a/okapi-operation-macro/src/operation/external_docs.rs b/okapi-operation-macro/src/operation/external_docs.rs
index 2757ac1..e8130d4 100644
--- a/okapi-operation-macro/src/operation/external_docs.rs
+++ b/okapi-operation-macro/src/operation/external_docs.rs
@@ -4,7 +4,7 @@ use quote::{quote, ToTokens};
 
 use crate::utils::quote_option;
 
-#[derive(Debug, FromMeta)]
+#[derive(Debug, FromMeta, PartialEq)]
 pub(super) struct ExternalDocs {
     url: String,
     #[darling(default)]
@@ -17,10 +17,69 @@ impl ToTokens for ExternalDocs {
         let description = quote_option(&self.description);
         tokens.extend(quote! {
             okapi::openapi3::ExternalDocs {
-                description: #description,
                 url: #url.into(),
+                description: #description,
                 ..Default::default()
             }
         })
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use syn::{parse_quote, ExprStruct, Meta};
+
+    use super::*;
+
+    #[test]
+    fn parse() {
+        let url = "test_url".to_string();
+        let description = "test_description".to_string();
+
+        let input: Meta = parse_quote! { external_docs(url = #url, description = #description) };
+
+        assert_eq!(
+            ExternalDocs::from_meta(&input).expect("Successfullt parsed"),
+            ExternalDocs {
+                url,
+                description: Some(description)
+            }
+        );
+    }
+
+    // NOTE: codegen test is kinda useless by itself, better to test expectations
+    // in some kind of integration tests. But I will leave it here as reference in case
+    // they needed.
+
+    // #[test]
+    // fn codegen() {
+    //     let url = "test_url".to_string();
+    //     let description = "test_description".to_string();
+
+    //     let test_value = ExternalDocs {
+    //         url: url.clone(),
+    //         description: Some(description.clone()),
+    //     };
+
+    //     let expected_output = quote! {
+    //         okapi::openapi3::ExternalDocs {
+    //             url: #url.into(),
+    //             description: Some(#description.into()),
+    //             ..Default::default()
+    //         }
+    //     };
+
+    //     assert_eq_tokens::<ExprStruct>(&test_value, &expected_output);
+    // }
+
+    // pub fn assert_eq_tokens<T>(actual: &impl ToTokens, expected: &TokenStream)
+    // where
+    //     T: Parse + Debug + PartialEq,
+    // {
+    //     let actual: T =
+    //         syn::parse2(actual.to_token_stream()).expect("Failed to parse actual value");
+    //     let expected: T = syn::parse2(expected.clone()).expect("Failed to parse expected value");
+
+    //     assert_eq!(actual, expected);
+    // }
+}
diff --git a/okapi-operation-macro/src/operation/security.rs b/okapi-operation-macro/src/operation/security.rs
index 4103c2d..234f4ba 100644
--- a/okapi-operation-macro/src/operation/security.rs
+++ b/okapi-operation-macro/src/operation/security.rs
@@ -9,12 +9,12 @@ static SECURITY_SCHEME_ATTRIBUTE_NAME: &str = "security_scheme";
 static SECURITY_SCHEME_NAME_ATTRIBUTE_NAME: &str = "name";
 static SECURITY_SCHEME_SCOPES_ATTRIBUTE_NAME: &str = "scopes";
 
-#[derive(Default, Debug)]
+#[derive(Default, Debug, PartialEq)]
 pub struct Security {
     schemes: Vec<SecurityScheme>,
 }
 
-#[derive(Default, Debug)]
+#[derive(Default, Debug, PartialEq)]
 struct SecurityScheme {
     name: String,
     scopes: Vec<String>,
@@ -124,3 +124,57 @@ impl ToTokens for SecurityScheme {
         });
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use assert_matches::assert_matches;
+    use syn::{parse_quote, ExprTuple, Meta};
+
+    use crate::utils::test_utils::assert_eq_tokens;
+
+    use super::*;
+
+    #[test]
+    fn parse_security_scheme() {
+        let name = "test_name".to_string();
+        let scopes = "scope1,scope2,scope3".to_string();
+
+        let input: Meta = parse_quote! { security_scheme(name = #name, scopes = #scopes) };
+
+        assert_eq!(
+            SecurityScheme::from_meta(&input).expect("Successfullt parsed"),
+            SecurityScheme {
+                name,
+                scopes: scopes.split(',').map(Into::into).collect()
+            }
+        );
+    }
+
+    #[test]
+    fn parse_security() {
+        let name1 = "test_name1".to_string();
+        let name2 = "test_name2".to_string();
+        let scopes = "scope1,scope2,scope3".to_string();
+
+        let input: Meta = parse_quote! { security(
+            security_scheme(name = #name1, scopes = #scopes),
+            security_scheme(name = #name2, scopes = #scopes)
+        ) };
+
+        assert_eq!(
+            Security::from_meta(&input).expect("Failed to parse"),
+            Security {
+                schemes: vec![
+                    SecurityScheme {
+                        name: name1,
+                        scopes: scopes.split(',').map(Into::into).collect()
+                    },
+                    SecurityScheme {
+                        name: name2,
+                        scopes: scopes.split(',').map(Into::into).collect()
+                    }
+                ]
+            }
+        );
+    }
+}