diff --git a/wetb/hawc2/tests/test_AtTimeFile.py b/wetb/hawc2/tests/test_AtTimeFile.py
index d6ae0cf24f018976aa39e2726f88157303e2af64..909151b2bb01bf27342b844c01ff51a7104206ac 100644
--- a/wetb/hawc2/tests/test_AtTimeFile.py
+++ b/wetb/hawc2/tests/test_AtTimeFile.py
@@ -60,6 +60,11 @@ class TestAtTimeFile(unittest.TestCase):
         self.assertEqual(atfile.radius_curved_ac(10), 10.2505)
         self.assertEqual(atfile.radius_curved_ac(10.5), 10.2505)
 
+    def test_rotor_name_null(self):
+        atfile = AtTimeFile(self.testfilepath + "at_time/test_rotor_name_null.dat", bladetip_radius=20.501)  # load file
+        print (atfile.radius_s())
+
+
 if __name__ == "__main__":
     #import sys;sys.argv = ['', 'Test.testName']
     unittest.main()