diff --git a/tests/test_forcing.py b/tests/test_forcing.py
index aedfd4f93..093e9db9f 100644
--- a/tests/test_forcing.py
+++ b/tests/test_forcing.py
@@ -42,7 +42,7 @@ def test_precip(data_catalog):
 def test_pet(data_catalog):
     et_data = data_catalog.get_rasterdataset("era5_daily_zarr")
     dem = data_catalog.get_rasterdataset("era5_orography").squeeze("time", drop=True)
-    
+
     peto_tdew = pet(et_data, et_data, dem, method="penman-monteith_tdew")
     assert peto_tdew.raster.shape == dem.raster.shape
     np.testing.assert_almost_equal(peto_tdew.mean(), 0.57746, decimal=4)
@@ -50,7 +50,7 @@ def test_pet(data_catalog):
     # Convert to relative humidity using simple approach
     # as relative humidity is not provided in ERA5 data
     # Lawrence (2005) dx.doi.org/10.1175/BAMS-86-2-225
-    et_data['rh'] = 5*et_data['temp_dew'] + 100 - 5*et_data['temp']
-    peto_simple = pet(et_data, et_data, dem, method="penman-monteith_rh_simple")
-    assert peto_simple.raster.shape == dem.raster.shape
-    np.testing.assert_almost_equal(peto_simple.mean(), 0.51279, decimal=4)
\ No newline at end of file
+    et_data["rh"] = 5 * et_data["temp_dew"] + 100 - 5 * et_data["temp"]
+    peto_rh = pet(et_data, et_data, dem, method="penman-monteith_rh_simple")
+    assert peto_rh.raster.shape == dem.raster.shape
+    np.testing.assert_almost_equal(peto_rh.mean(), 0.51279, decimal=4)