diff --git a/tests/test_gfit.py b/tests/test_gfit.py
index 00511e2..e326627 100644
--- a/tests/test_gfit.py
+++ b/tests/test_gfit.py
@@ -33,3 +33,5 @@ def test_psds():
     np.testing.assert_almost_equal(my_psds['IncanNumEnsemble'].sum(), 32.22939087)
     np.testing.assert_almost_equal(my_psds['ScatMassEnsemble'].sum(), 3.15026266)
     np.testing.assert_almost_equal(my_psds['IncanMassEnsemble'].sum(), 0.08177226)
+    np.testing.assert_almost_equal(my_binary['DeadtimeRelativeBias'].mean(), -0.00023515)
+    coeff, beam_profile = pysp2.util.beam_shape(my_binary,beam_position_from='peak maximum',Globals=pysp2.util.DMTGlobals())