diff --git a/spectractor/simulation/image_simulation.py b/spectractor/simulation/image_simulation.py
index 8e1434ab..db083a54 100644
--- a/spectractor/simulation/image_simulation.py
+++ b/spectractor/simulation/image_simulation.py
@@ -539,7 +539,7 @@ def ImageSim(image_filename, spectrum_filename, outputdir, pwv=5, ozone=300, aer
     # Flat model
     flat = None
     if with_flat:
-        my_logger.info('\n\tStar field model...')
+        my_logger.info('\n\tFlat model...')
         flat = FlatModel(gains=[[1, 2, 3, 4], [4, 3, 2, 1]], randomness_level=1e-2)
         if parameters.DEBUG:
             flat.plot_model()
diff --git a/tests/test_fullchain.py b/tests/test_fullchain.py
index 2dfdc083..b93dd106 100644
--- a/tests/test_fullchain.py
+++ b/tests/test_fullchain.py
@@ -222,7 +222,7 @@ def test_ctio_fullchain():
     assert np.isclose(shift_y, 0, atol=parameters.PIXSHIFT_PRIOR)  # shift_y
     assert np.isclose(D, spectrum.header["D2CCD_T"], atol=0.1)  # D2CCD
     assert np.isclose(B, 1, atol=1e-3)  # B
-    assert np.isclose(Astar, 1, atol=1e-3)  # Astar
+    assert np.isclose(Astar, 1, atol=1e-2)  # Astar
     assert np.all(np.isclose(psf_poly_params[(PSF_POLY_ORDER + 1):len(PSF_POLY_PARAMS_TRUTH)//N_DIFF_ORDERS - 1],
                              np.array(PSF_POLY_PARAMS_TRUTH)[(PSF_POLY_ORDER + 1):len(PSF_POLY_PARAMS_TRUTH)//N_DIFF_ORDERS - 1],
                              rtol=0.01, atol=0.01))