diff --git a/tests/satellite_constellations/test_satellites.py b/tests/satellite_constellations/test_satellites.py
index c890f894..93602c14 100644
--- a/tests/satellite_constellations/test_satellites.py
+++ b/tests/satellite_constellations/test_satellites.py
@@ -12,9 +12,13 @@ def test_constellations(self):
 
         mjd0 = SURVEY_START_MJD
         sv1 = starlink_tles_v1()
-        _ = starlink_tles_v2()
-        _ = oneweb_tles()
+        sv2 = starlink_tles_v2()
+        onw = oneweb_tles()
 
+        assert(sv1 is not None)
+        assert(sv2 is not None)
+        assert(onw is not None)
+        
         const = Constellation(sv1)
 
         lengths, n_s = const.check_pointings(