diff --git a/pyproject.toml b/pyproject.toml
index f765cf5..0c8ad84 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,8 +42,7 @@ dependencies = [
 ]
 
 [project.optional-dependencies]
-test = [
-    "unittest",
+devel = [
     "httpx",
     "OpenCC",
 ]