diff --git a/src/object/mod.rs b/src/object/mod.rs
index 4c0f7cf..44616f4 100644
--- a/src/object/mod.rs
+++ b/src/object/mod.rs
@@ -182,10 +182,10 @@ mod tests {
         assert_eq!(obj.object_name, "artist");
         assert_eq!(obj.filename, "tormenta-rey");
         assert_eq!(obj.values.len(), 4);
-        assert!(obj.values.get("name").is_some());
-        assert!(obj.values.get("tour_dates").is_some());
-        assert!(obj.values.get("numbers").is_some());
-        assert!(obj.values.get("videos").is_some());
+        assert!(obj.values.contains_key("name"));
+        assert!(obj.values.contains_key("tour_dates"));
+        assert!(obj.values.contains_key("numbers"));
+        assert!(obj.values.contains_key("videos"));
         assert_eq!(
             obj.values.get("name"),
             Some(&FieldValue::String("Tormenta Rey".to_string()))
diff --git a/src/object_definition.rs b/src/object_definition.rs
index 467d7d5..103ca5b 100644
--- a/src/object_definition.rs
+++ b/src/object_definition.rs
@@ -124,7 +124,7 @@ pub mod tests {
         assert!(artist.fields.contains_key("name"));
         assert_eq!(artist.fields.get("name").unwrap(), &FieldType::String);
         assert!(
-            artist.fields.get("template").is_none(),
+            !artist.fields.contains_key("template"),
             "did not copy the template reserved field"
         );
         assert!(artist.template.is_some());