diff --git a/test/tw-1630.t b/test/tw-1630.t
index 87827d77f..d51f9fe23 100755
--- a/test/tw-1630.t
+++ b/test/tw-1630.t
@@ -39,12 +39,23 @@ class TestBug1630(TestCase):
     def setUp(self):
         """Executed before each test in the class"""
         self.t = Task()
+        self.t("add zero")
+        self.t("add one due:7d")
+        self.t("add two due:10d")
 
     def test_attribute_modifier_with_duration(self):
         """Verify that 'due.before:10d' is correctly interpreted"""
-        self.t("add one due:7d")
-        code, out, err = self.t("due.before:10d list")
-        self.tap(out)
+        code, out, err = self.t("due.before:10d list rc.verbose:nothing")
+        self.assertNotIn("zero", out)
+        self.assertIn("one", out)
+        self.assertNotIn("two", out)
+
+    def test_attribute_no_modifier_with_duration(self):
+        """Verify that 'due:7d' is correctly interpreted"""
+        code, out, err = self.t("due:7d list rc.verbose:nothing")
+        self.assertNotIn("zero", out)
+        self.assertIn("one", out)
+        self.assertNotIn("two", out)
 
 
 if __name__ == "__main__":