diff --git a/src/nomad_simulations/properties/spectral_profile.py b/src/nomad_simulations/properties/spectral_profile.py
index 87583dd5..6707ba80 100644
--- a/src/nomad_simulations/properties/spectral_profile.py
+++ b/src/nomad_simulations/properties/spectral_profile.py
@@ -585,15 +585,15 @@ def generate_from_contributions(self, logger: BoundLogger) -> None:
         # TODO check if this method is general enough
         if self.xanes_spectrum is not None and self.exafs_spectrum is not None:
             # Concatenate XANE and EXAFS `Energy` grid points
-            xanes_energies = get_variables(self.xanes_spectrum.variables, Energy)
-            exafs_energies = get_variables(self.exafs_spectrum.variables, Energy)
-            if len(xanes_energies) == 0 or len(exafs_energies) == 0:
+            xanes_variables = get_variables(self.xanes_spectrum.variables, Energy)
+            exafs_variables = get_variables(self.exafs_spectrum.variables, Energy)
+            if len(xanes_variables) == 0 or len(exafs_variables) == 0:
                 logger.warning(
                     'Could not extract the `Energy` grid points from XANES or EXAFS.'
                 )
                 return
-            xanes_energies = xanes_energies[0].points
-            exafs_energies = exafs_energies[0].points
+            xanes_energies = xanes_variables[0].points
+            exafs_energies = exafs_variables[0].points
             if xanes_energies.max() > exafs_energies.min():
                 logger.warning(
                     'The XANES `Energy` grid points are not below the EXAFS `Energy` grid points.'
diff --git a/tests/test_permittivity.py b/tests/test_permittivity.py
index 7bead913..23743588 100644
--- a/tests/test_permittivity.py
+++ b/tests/test_permittivity.py
@@ -108,7 +108,10 @@ def test_resolve_type(self, variables: Optional[List[Variables]], result: str):
         ],
     )
     def test_extract_absorption_spectra(
-        self, variables: Optional[List[Variables]], value: Optional[np.array], result
+        self,
+        variables: Optional[List[Variables]],
+        value: Optional[np.ndarray],
+        result: Optional[List[float]],
     ):
         """
         Test the `extract_absorption_spectra` method. The `result` in the last valid case corresponds to the imaginary part of