diff --git a/base/src/test/mod.rs b/base/src/test/mod.rs
index b7fd6ed..3cf5957 100644
--- a/base/src/test/mod.rs
+++ b/base/src/test/mod.rs
@@ -45,6 +45,7 @@ mod test_set_user_input;
 mod test_sheet_markup;
 mod test_sheets;
 mod test_styles;
+mod test_sumsq;
 mod test_trigonometric;
 mod test_true_false;
 mod test_weekday_return_types;
diff --git a/base/src/test/test_sumsq.rs b/base/src/test/test_sumsq.rs
new file mode 100644
index 0000000..dc7ddfd
--- /dev/null
+++ b/base/src/test/test_sumsq.rs
@@ -0,0 +1,17 @@
+#![allow(clippy::unwrap_used)]
+
+use crate::test::util::new_empty_model;
+
+#[test]
+fn arguments() {
+    let mut model = new_empty_model();
+    model._set("A1", "=SUMSQ()");
+    model._set("A2", "=SUMSQ(2)");
+    model._set("A3", "=SUMSQ(1, 2)");
+
+    model.evaluate();
+
+    assert_eq!(model._get_text("A1"), *"#ERROR!");
+    assert_eq!(model._get_text("A2"), *"4");
+    assert_eq!(model._get_text("A3"), *"5");
+}