diff --git a/Cargo.lock b/Cargo.lock
index be8b205..318910d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -367,6 +367,12 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "diff"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56254986775e3233ffa9c4d7d3faaf6d36a2c09d30b20687e9f88bc8bafc16c8"
+
 [[package]]
 name = "dinopkg-cli"
 version = "0.1.0"
@@ -404,6 +410,8 @@ dependencies = [
 name = "dinopkg-package-json"
 version = "0.3.0"
 dependencies = [
+ "maplit",
+ "pretty_assertions",
  "serde",
  "serde_json",
  "serde_with",
@@ -1400,6 +1408,16 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
 
+[[package]]
+name = "pretty_assertions"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "af7cee1a6c8a5b9208b3cb1061f10c0cb689087b3d8ce85fb9d2dd7a29b6ba66"
+dependencies = [
+ "diff",
+ "yansi",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.86"
@@ -2453,6 +2471,12 @@ dependencies = [
  "linked-hash-map",
 ]
 
+[[package]]
+name = "yansi"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09041cd90cf85f7f8b2df60c646f853b7f535ce68f85244eb6731cf89fa498ec"
+
 [[package]]
 name = "zeroize"
 version = "1.8.1"
diff --git a/crates/dinopkg-package-json/Cargo.toml b/crates/dinopkg-package-json/Cargo.toml
index baa0420..57126be 100644
--- a/crates/dinopkg-package-json/Cargo.toml
+++ b/crates/dinopkg-package-json/Cargo.toml
@@ -9,3 +9,7 @@ serde_json = "1.0.120"
 serde_with = "3.9.0"
 thiserror = "1.0.61"
 tokio = { version = "1.38.0", features = ["fs"], optional = true }
+
+[dev-dependencies]
+maplit = "1.0.2"
+pretty_assertions = "1.4.0"
diff --git a/crates/dinopkg-package-json/src/lib.rs b/crates/dinopkg-package-json/src/lib.rs
index f4bff2e..e4465f6 100644
--- a/crates/dinopkg-package-json/src/lib.rs
+++ b/crates/dinopkg-package-json/src/lib.rs
@@ -8,7 +8,7 @@ mod util;
 
 #[serde_as]
 #[skip_serializing_none]
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Default)]
 #[serde(rename_all = "camelCase")]
 pub struct PackageJson {
     pub name: String,
@@ -28,14 +28,14 @@ pub struct PackageJson {
     pub dev_dependencies: Option<Dependencies>,
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, PartialEq, Eq)]
 #[serde(untagged)]
 pub enum AuthorVariant {
     Author { name: String, url: Option<String> },
     String(String),
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Debug, PartialEq, Eq)]
 #[serde(untagged)]
 pub enum RepositoryVariant {
     Repository { r#type: String, url: Option<String> },
@@ -91,3 +91,85 @@ impl PackageJson {
         Ok((Self::parse(&file)?, path))
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use maplit::hashmap;
+    use pretty_assertions::assert_eq;
+
+    #[test]
+    fn test_parse() {
+        let json = r#"{
+            "name": "dinopkg-package-json",
+            "version": "0.1.0",
+            "author": "Skyfall",
+            "dependencies": {
+                "express": "^4.17.1"
+            }
+        }"#;
+        let package_json = PackageJson::parse(json).unwrap();
+        assert_eq!(
+            package_json,
+            PackageJson {
+                name: "dinopkg-package-json".into(),
+                version: "0.1.0".into(),
+                author: Some(AuthorVariant::String("Skyfall".into())),
+                dependencies: Some(hashmap! {
+                    "express".into() => "^4.17.1".into(),
+                }),
+                ..Default::default()
+            }
+        )
+    }
+
+    #[test]
+    fn author_variants() {
+        let json = r#"{
+                "name": "dinopkg-package-json",
+                "version": "0.1.0",
+                "author": {
+                    "name": "Skyfall",
+                    "url": "https://skyfall.dev"
+                }
+            }"#;
+        let package_json = PackageJson::parse(json).unwrap();
+        assert_eq!(
+            package_json,
+            PackageJson {
+                name: "dinopkg-package-json".into(),
+                version: "0.1.0".into(),
+                author: Some(AuthorVariant::Author {
+                    name: "Skyfall".into(),
+                    url: Some("https://skyfall.dev".into())
+                }),
+                ..Default::default()
+            }
+        )
+    }
+
+    #[test]
+    fn repository_variants() {
+        let json = r#"{
+                "name": "dinopkg-package-json",
+                "version": "0.1.0",
+                "repository": {
+                    "type": "git",
+                    "url": "git+https://github.com/SkyfallWasTaken/choco.git"
+                }
+            }"#;
+        let package_json = PackageJson::parse(json).unwrap();
+        assert_eq!(
+            package_json,
+            PackageJson {
+                name: "dinopkg-package-json".into(),
+                version: "0.1.0".into(),
+                repository: Some(RepositoryVariant::Repository {
+                    r#type: "git".into(),
+                    url: Some("git+https://github.com/SkyfallWasTaken/choco.git".into())
+                }),
+                ..Default::default()
+            }
+        )
+    }
+}