diff --git a/src/types/api/attachment.rs b/src/types/api/attachment.rs
index 3f0b8b1..2736762 100644
--- a/src/types/api/attachment.rs
+++ b/src/types/api/attachment.rs
@@ -28,3 +28,13 @@ impl Display for Attachment {
         write!(f, "{}", self.name)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn deserialize_multiple_attachments() {
+        let data = include_str!("../../../test_data/example_attachments.json");
+
+        let _: Vec<super::Attachment> = serde_json::from_str(data).unwrap();
+    }
+}
diff --git a/src/types/api/issue.rs b/src/types/api/issue.rs
index e8ca29e..274e77d 100644
--- a/src/types/api/issue.rs
+++ b/src/types/api/issue.rs
@@ -33,3 +33,89 @@
 // url	string
 // user	User{...}
 // }]
+
+use std::fmt::Display;
+
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use url::Url;
+
+use crate::types::api::attachment::Attachment;
+use crate::types::api::label::Label;
+use crate::types::api::milestone::Milestone;
+use crate::types::api::pull_request_meta::PullRequestMeta;
+use crate::types::api::repo_meta::RepositoryMeta;
+use crate::types::api::user::User;
+use crate::types::misc::boolean_enums::is::locked::IsLocked;
+use crate::types::misc::boolean_enums::state_type::StateType;
+
+/// Represents an issue in a repository.
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq)]
+pub struct Issue {
+    /// List of attachments.
+    pub assets: Vec<Attachment>,
+    /// The user assigned to the issue.
+    pub assignee: Option<User>,
+    /// List of assignees.
+    pub assignees: Vec<User>,
+    /// The body of the issue.
+    pub body: String,
+    /// The date and time when the issue was closed (if closed).
+    pub closed_at: Option<DateTime<Utc>>,
+    /// The number of comments on the issue.
+    pub comments: usize,
+    /// The date and time when the issue was created.
+    pub created_at: DateTime<Utc>,
+    /// The due date of the issue.
+    pub due_date: Option<DateTime<Utc>>,
+    /// The HTML URL of the issue.
+    pub html_url: Url,
+    /// The unique identifier of the issue.
+    pub id: usize,
+    /// Indicates whether the issue is locked.
+    pub is_locked: IsLocked,
+    /// List of labels associated with the issue.
+    pub labels: Vec<Label>,
+    /// The milestone associated with the issue.
+    pub milestone: Option<Milestone>,
+    /// The issue number.
+    pub number: usize,
+    /// The original author of the issue.
+    pub original_author: String,
+    /// The ID of the original author.
+    pub original_author_id: usize,
+    /// Pull request information for the issue.
+    pub pull_request: Option<PullRequestMeta>,
+    /// The reference for the issue.
+    pub ref_field: String,
+    /// Metadata for the repository.
+    pub repository: RepositoryMeta,
+    /// The state of the issue.
+    pub state: StateType,
+    /// The title of the issue.
+    pub title: String,
+    /// The date and time when the issue was last updated.
+    pub updated_at: DateTime<Utc>,
+    /// The URL of the issue.
+    pub url: Url,
+    /// The user who created the issue.
+    pub user: User,
+}
+
+impl Display for Issue {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.title)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::types::api::issue::Issue;
+
+    #[test]
+    fn deserialize_issue() {
+        let data = include_str!("../../../test_data/example_issue.json");
+
+        let _: Issue = serde_json::from_str(data).unwrap();
+    }
+}
diff --git a/src/types/api/pull_request_meta.rs b/src/types/api/pull_request_meta.rs
index f247a38..c3f03a5 100644
--- a/src/types/api/pull_request_meta.rs
+++ b/src/types/api/pull_request_meta.rs
@@ -11,3 +11,13 @@ pub struct PullRequestMeta {
     /// The date and time when the PR was merged (if merged).
     pub merged_at: Option<DateTime<Utc>>,
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn deserialize_pull_request_meta() {
+        let json_response = include_str!("../../../test_data/example_pull_request_meta.json");
+
+        let _: super::PullRequestMeta = serde_json::from_str(json_response).unwrap();
+    }
+}
diff --git a/src/types/api/repo_meta.rs b/src/types/api/repo_meta.rs
index 1c4b935..5e66fec 100644
--- a/src/types/api/repo_meta.rs
+++ b/src/types/api/repo_meta.rs
@@ -20,3 +20,13 @@ impl Display for RepositoryMeta {
         write!(f, "{}", self.full_name)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn deserialize_repo_meta() {
+        let data = include_str!("../../../test_data/example_repo_meta.json");
+
+        let _: super::RepositoryMeta = serde_json::from_str(data).unwrap();
+    }
+}
diff --git a/test_data/example_attachments.json b/test_data/example_attachments.json
new file mode 100644
index 0000000..765c03e
--- /dev/null
+++ b/test_data/example_attachments.json
@@ -0,0 +1,20 @@
+[
+  {
+    "browser_download_url": "https://example.com/attachment1",
+    "created_at": "2023-10-21T14:30:00Z",
+    "download_count": 100,
+    "id": 1,
+    "name": "attachment1",
+    "size": 1024,
+    "uuid": "abc123"
+  },
+  {
+    "browser_download_url": "https://example.com/attachment2",
+    "created_at": "2023-10-21T14:45:00Z",
+    "download_count": 50,
+    "id": 2,
+    "name": "attachment2",
+    "size": 2048,
+    "uuid": "def456"
+  }
+]
diff --git a/test_data/example_issue.json b/test_data/example_issue.json
new file mode 100644
index 0000000..867a7ae
--- /dev/null
+++ b/test_data/example_issue.json
@@ -0,0 +1,105 @@
+{
+  "assets": [
+    {
+      "browser_download_url": "https://example.com/attachment1",
+      "created_at": "2023-10-21T14:30:00Z",
+      "download_count": 100,
+      "id": 1,
+      "name": "attachment1",
+      "size": 1024,
+      "uuid": "abc123"
+    },
+    {
+      "browser_download_url": "https://example.com/attachment2",
+      "created_at": "2023-10-21T14:45:00Z",
+      "download_count": 50,
+      "id": 2,
+      "name": "attachment2",
+      "size": 2048,
+      "uuid": "def456"
+    }
+  ],
+  "assignee": null,
+  "assignees": [
+    {
+      "active": true,
+      "avatar_url": "https://codeberg.org/avatars/foo-bar",
+      "created": "2022-11-04T14:41:29Z",
+      "description": "",
+      "email": "example@mail.com",
+      "followers_count": 2,
+      "following_count": 1,
+      "full_name": "",
+      "id": 12345,
+      "is_admin": false,
+      "language": "en-US",
+      "last_login": "2023-07-26T19:38:27Z",
+      "location": "",
+      "login": "ExampleUser",
+      "login_name": "",
+      "prohibit_login": false,
+      "restricted": false,
+      "starred_repos_count": 0,
+      "username": "ExampleUser",
+      "visibility": "public",
+      "website": "https://example.com"
+    }
+  ],
+  "body": "Issue body text",
+  "closed_at": null,
+  "comments": 0,
+  "created_at": "2023-10-21T14:30:00Z",
+  "due_date": null,
+  "html_url": "https://example.com/issues/1",
+  "id": 1,
+  "is_locked": false,
+  "labels": [
+    {
+      "color": "00aabb",
+      "description": "Label a label to an issue or a pr",
+      "exclusive": false,
+      "id": 42,
+      "name": "bug",
+      "url": "https://example.com/labels/bug"
+    }
+  ],
+  "milestone": null,
+  "number": 1,
+  "original_author": "original_author",
+  "original_author_id": 123,
+  "pull_request": null,
+  "ref_field": "refs/1",
+  "repository": {
+    "full_name": "exampleuser/example-repo",
+    "id": 123,
+    "name": "example-repo",
+    "owner": "exampleuser"
+  },
+  "state": "Open",
+  "title": "Example Issue",
+  "updated_at": "2023-10-21T14:30:00Z",
+  "url": "https://example.com/issues/1",
+  "user": {
+    "active": true,
+    "avatar_url": "https://codeberg.org/avatars/foo-bar",
+    "created": "2022-11-04T14:41:29Z",
+    "description": "",
+    "email": "example@mail.com",
+    "followers_count": 2,
+    "following_count": 1,
+    "full_name": "",
+    "id": 12345,
+    "is_admin": false,
+    "language": "en-US",
+    "last_login": "2023-07-26T19:38:27Z",
+    "location": "",
+    "login": "ExampleUser",
+    "login_name": "",
+    "prohibit_login": false,
+    "restricted": false,
+    "starred_repos_count": 0,
+    "username": "ExampleUser",
+    "visibility": "public",
+    "website": "https://example.com"
+  }
+}
diff --git a/test_data/example_pull_request_meta.json b/test_data/example_pull_request_meta.json
new file mode 100644
index 0000000..a4a21db
--- /dev/null
+++ b/test_data/example_pull_request_meta.json
@@ -0,0 +1,4 @@
+{
+  "merged": true,
+  "merged_at": "2023-10-21T14:30:00Z"
+}
diff --git a/test_data/example_repo_meta.json b/test_data/example_repo_meta.json
new file mode 100644
index 0000000..700ec0c
--- /dev/null
+++ b/test_data/example_repo_meta.json
@@ -0,0 +1,6 @@
+{
+  "full_name": "exampleuser/example-repo",
+  "id": 123,
+  "name": "example-repo",
+  "owner": "exampleuser"
+}