diff --git a/tests/test_tools.py b/tests/test_tools.py
index a177fb7..8f3bbc1 100644
--- a/tests/test_tools.py
+++ b/tests/test_tools.py
@@ -1,24 +1,37 @@
 import pytest
 from glidertest import fetchers, tools
 import matplotlib.pyplot as plt
+import math
 
 
 def test_plots():
     ds = fetchers.load_sample_dataset()
-    tools.plot_basic_vars(ds, end_prof=int(ds.PROFILE_NUMBER.max()))
+    tools.plot_basic_vars(ds,start_prof=0, end_prof=int(ds.PROFILE_NUMBER.max()))
+    assert ax[0].get_ylabel() == 'Depth (m)'
+    assert ax[0].get_xlabel() == f'Average Temperature [C] \nbetween profile {start_prof} and {end_prof}'
+    return fig
 
 
 def test_up_down_bias():
     ds = fetchers.load_sample_dataset()
     fig, ax = plt.subplots()
     df = tools.updown_bias(ds, var='PSAL', v_res=1)
+    bins = np.unique(np.round(ds.DEPTH,0))
+    ncell = math.ceil(len(bins)/v_res)
+    assert len(df) == ncell
     tools.plot_updown_bias(df, ax,  xlabel='Salinity')
-
+    lims = np.abs(df.dc)
+    assert ax.get_xlim() == (-np.nanpercentile(lims, 99.5), np.nanpercentile(lims, 99.5))
+    assert ax.get_ylim() == (df.depth.max() + 1, -df.depth.max() / 30)
+    assert ax[0].get_xlabel() == xlabel
+ 
 
 def test_chl():
     ds = fetchers.load_sample_dataset()
     tools.optics_first_check(ds, var='CHLA')
+    assert ax.get_ylabel() == var
     tools.optics_first_check(ds, var='BBP700')
+    assert ax.get_ylabel() == var
     with pytest.raises(KeyError) as e:
         tools.optics_first_check(ds, var='nonexistent_variable')
 
@@ -29,14 +42,26 @@ def test_quench_sequence():
         ds = ds.set_xindex('TIME')
     fig, ax = plt.subplots()
     tools.plot_section_with_srss(ds, 'CHLA')
+    assert ax.get_ylabel == 'Depth [m]'
+    assert ax.get_ylim() == (ylim, -ylim / 30)
+    
     dayT, nightT = tools.day_night_avg(ds, sel_var='TEMP')
+    assert len(nightT.dat.dropna()) > 0
+    assert len(dayT.dat.dropna()) > 0
+    
     fig, ax = plt.subplots()
     tools.plot_daynight_avg(dayT, nightT, ax, xlabel='Temperature [C]') 
+    assert ax.get_ylabel() == 'Depth (m)'
+    assert ax.get_xlabel() == xlabel
+    assert ax.get_title() == sel_day
 
 def test_temporal_drift():
     ds = fetchers.load_sample_dataset()
     fig, ax = plt.subplots(1, 2)
     tools.check_temporal_drift(ds,'DOXY', ax)
+    assert ax.get_ylabel() == 'Depth (m)'
+    assert ax.get_xlabel() == var
+    assert ax.get_xlim == (np.nanpercentile(ds[var], 0.01), np.nanpercentile(ds[var], 99.99))
     tools.check_temporal_drift(ds,'CHLA')
         
 def test_profile_check():
@@ -50,4 +75,4 @@ def test_check_monotony():
     temperature_monotony = tools.check_monotony(ds.TEMP)
     assert profile_number_monotony
     assert not temperature_monotony
-    
\ No newline at end of file
+