diff --git a/src/script/parameter.rs b/src/script/parameter.rs
index bea486e..f67f95b 100644
--- a/src/script/parameter.rs
+++ b/src/script/parameter.rs
@@ -103,3 +103,78 @@ pub struct ParameterSet {
     value_from_pipeline: Option<bool>,
     value_from_pipeline_by_property_name: Option<bool>,
 }
+
+#[cfg(test)]
+mod tests {
+    #![allow(clippy::unwrap_used, clippy::expect_used)]
+    use super::*;
+    use serde_json::{Value, json};
+
+    fn make_base_parameter(is_array: bool, data_type: DataType) -> Parameter {
+        Parameter {
+            name: Arc::from("testParam"),
+            data_type,
+            is_array,
+            aliases: vec![Arc::from("alias1")],
+            description: Some(Arc::from("desc")),
+            help_message: Some(Arc::from("help")),
+            parameter_sets: vec![],
+            validations: vec![],
+        }
+    }
+
+    #[test]
+    fn deserialize_with_array_type() {
+        let json_data = json!({
+            "name": "foo",
+            "type": "string[]",
+            "aliases": ["aliasA"],
+            "description": "some description",
+            "helpMessage": "some help",
+            "parameterSets": [],
+            "validations": []
+        });
+
+        let param: Parameter = serde_json::from_value(json_data).unwrap();
+        assert!(param.is_array);
+        assert!(matches!(param.data_type, DataType::String));
+    }
+
+    #[test]
+    fn deserialize_without_array_type() {
+        let json_data = json!({
+            "name": "bar",
+            "type": "boolean",
+            "aliases": [],
+            "description": null,
+            "helpMessage": null,
+            "parameterSets": [],
+            "validations": []
+        });
+
+        let param: Parameter = serde_json::from_value(json_data).unwrap();
+        assert!(!param.is_array);
+        assert!(matches!(param.data_type, DataType::Boolean));
+    }
+
+    #[test]
+    fn serialize_with_array_type() {
+        let param = make_base_parameter(true, DataType::Int32);
+        let json_str = serde_json::to_string(&param).unwrap();
+        let value: Value = serde_json::from_str(&json_str).unwrap();
+
+        assert_eq!(value["type"], "Int32[]");
+        assert_eq!(value["name"], "testParam");
+        assert!(value.get("is_array").is_none()); // is_array must not be serialized
+    }
+
+    #[test]
+    fn serialize_without_array_type() {
+        let param = make_base_parameter(false, DataType::Int64);
+        let json_str = serde_json::to_string(&param).unwrap();
+        let value: Value = serde_json::from_str(&json_str).unwrap();
+
+        assert_eq!(value["type"], "Int64");
+        assert!(value.get("is_array").is_none()); // is_array must not be serialized
+    }
+}