diff --git a/practical.yml b/practical.yml
index c702eb3..656b230 100644
--- a/practical.yml
+++ b/practical.yml
@@ -5,4 +5,11 @@ source: "subject_source"
 tag_every: "2min"
 file_check_ignore: []
 to_copy:
+  - "tests/"
 exercises:
+  option:
+    required_files:
+      - "src/errors.rs"
+      - "src/errors/option.rs"
+    tests:
+      - "--test=option"