diff --git a/smarty-rust-sdk/src/us_extract_api/mod.rs b/smarty-rust-sdk/src/us_extract_api/mod.rs
index 17c101a..5116728 100644
--- a/smarty-rust-sdk/src/us_extract_api/mod.rs
+++ b/smarty-rust-sdk/src/us_extract_api/mod.rs
@@ -35,9 +35,12 @@ mod tests {
             ..Default::default()
         };
 
-        assert_eq!(
-            serde_json::to_string_pretty(&lookup).unwrap(),
-            "{\n  \"text\": \"Meet me at 3214 N University Ave Provo UT 84604 just after 3pm.\",\n  \"html\": \"\",\n  \"aggressive\": true,\n  \"addr_line_breaks\": false,\n  \"addr_per_line\": 1,\n  \"match\": \"strict\"\n}"
-        );
+        let expected_result = vec![
+            ("aggressive".to_string(), "true".to_string()),
+            ("addr_per_line".to_string(), "1".to_string()),
+            ("match".to_string(), "strict".to_string()),
+        ];
+
+        assert_eq!(lookup.into_param_array(), expected_result);
     }
 }
diff --git a/smarty-rust-sdk/src/us_street_api/lookup.rs b/smarty-rust-sdk/src/us_street_api/lookup.rs
index d85a75b..84d7c6a 100644
--- a/smarty-rust-sdk/src/us_street_api/lookup.rs
+++ b/smarty-rust-sdk/src/us_street_api/lookup.rs
@@ -97,6 +97,7 @@ impl Lookup {
 }
 
 #[derive(Default, Debug, Clone, PartialEq, Serialize)]
+#[serde(rename_all = "snake_case")]
 pub enum MatchStrategy {
     #[default]
     Strict,
diff --git a/smarty-rust-sdk/src/us_street_api/mod.rs b/smarty-rust-sdk/src/us_street_api/mod.rs
index fcea5f2..032ff2b 100644
--- a/smarty-rust-sdk/src/us_street_api/mod.rs
+++ b/smarty-rust-sdk/src/us_street_api/mod.rs
@@ -42,6 +42,7 @@ mod tests {
             ("lastline".to_string(), "Mountain View, CA".to_string()),
             ("candidates".to_string(), 5.to_string()),
             ("match".to_string(), "enhanced".to_string()),
+            ("format".to_string(), "default".to_string()),
         ];
 
         assert_eq!(lookup.into_param_array(), expected_result);
@@ -62,6 +63,7 @@ mod tests {
             ("lastline".to_string(), "Mountain View, CA".to_string()),
             ("candidates".to_string(), 5.to_string()),
             ("match".to_string(), "enhanced".to_string()),
+            ("format".to_string(), "default".to_string()),
         ];
 
         let mut batch = Batch::default();