diff --git a/tests/test_swapon.py b/tests/test_swapon.py
index 447f4ee3..41c36b46 100644
--- a/tests/test_swapon.py
+++ b/tests/test_swapon.py
@@ -25,6 +25,12 @@ class Swapon(unittest.TestCase):
                 cls.f_in[file] = a.read()
                 cls.f_json[file] = json.loads(b.read())
 
+    def test_foo_nodata(self):
+        """
+        Test 'foo' with no data
+        """
+        self.assertEqual(parse('', quiet=True), [])
+
     def test_swapon_all(self):
         """
         Test 'swapon --output-all'