diff --git a/lumispy/signals/luminescence_spectrum.py b/lumispy/signals/luminescence_spectrum.py
index 1a0634e9a..aa23f4e31 100644
--- a/lumispy/signals/luminescence_spectrum.py
+++ b/lumispy/signals/luminescence_spectrum.py
@@ -247,7 +247,7 @@ def to_eV(self, inplace=True, jacobian=True):
         The intensity is converted from counts/nm (counts/µm) to counts/cm^-1
         by doing a Jacobian transformation, see e.g. Mooney and Kambhampati,
         J. Phys. Chem. Lett. 4, 3316 (2013), doi:10.1021/jz401508t, which
-        ensures that integrated signals are correct also in the wavenumber 
+        ensures that integrated signals are correct also in the wavenumber
         domain. If the variance of the signal is known, i.e.
         `metadata.Signal.Noise_properties.variance` is a signal representing the
         variance, a squared renormalization of the variance is performed.
@@ -557,10 +557,6 @@ def remove_background_from_file(self, background=None, inplace=False, **kwargs):
                 try:
                     bkg_x = background_xy[0]
                     bkg_y = background_xy[1]
-                    if len(bkg_x) is not len(bkg_y):
-                        raise AttributeError(
-                            "The length of the x and y axis must match."
-                        )
                 except IndexError:  # pragma: no cover
                     raise AttributeError(
                         "Please provide a background file containing both the x and y axis."
diff --git a/lumispy/tests/signals/test_luminescence_spectrum.py b/lumispy/tests/signals/test_luminescence_spectrum.py
index c57d4e160..7b052f687 100644
--- a/lumispy/tests/signals/test_luminescence_spectrum.py
+++ b/lumispy/tests/signals/test_luminescence_spectrum.py
@@ -35,12 +35,6 @@
     (LumiSpectrum(np.ones(50)), [np.zeros(50, dtype="float64")]),
 ]
 
-error_backgrounds = [
-    ([np.linspace(0, 49, num=10, dtype="float64"), np.ones(50)], AttributeError),
-    ([[1, 1], [1, 1], [1, 1]], AttributeError),
-    # ([np.linspace(0, 48, num=10, dtype="float64"), np.ones(50)], AttributeError),
-]
-
 
 class TestLumiSpectrum:
     def test_remove_background_from_file(self):
@@ -55,9 +49,9 @@ def test_remove_background_from_file(self):
 
     def test_errors_raise(self):
         s = LumiSpectrum(np.ones(50))
-        for bkg, error in error_backgrounds:
-            with pytest.raises(error):
-                s.remove_background_from_file(bkg)
+        with pytest.raises(AttributeError):
+            bkg = np.array([[1, 1], [1, 1], [1, 1]])
+            s.remove_background_from_file(bkg)
         # Test that a GUI is opened if s.remove_background_from_file is passed without a background
         # s.remove_background_from_file()
         # Test double background removal