diff --git a/src/depiction/calibration/perform_calibration.py b/src/depiction/calibration/perform_calibration.py
index 7881bf0..8b5bf47 100644
--- a/src/depiction/calibration/perform_calibration.py
+++ b/src/depiction/calibration/perform_calibration.py
@@ -3,7 +3,6 @@
 from pathlib import Path
 from typing import Optional
 
-import h5py
 import numpy as np
 import xarray
 from loguru import logger
diff --git a/src/depiction/tools/simulate/generate_synthetic_imzml.py b/src/depiction/tools/simulate/generate_synthetic_imzml.py
index 430e7c0..6b5d332 100644
--- a/src/depiction/tools/simulate/generate_synthetic_imzml.py
+++ b/src/depiction/tools/simulate/generate_synthetic_imzml.py
@@ -52,7 +52,7 @@ def generate_centroided_spectrum(
         target_mz, target_int = self._generate_isotopic_peaks(
             mz_arr=target_masses, int_arr=target_intensities, n_isotopes=n_isotopes
         )
-        n_noise_peaks = round((self._mz_max - self._mz_min))
+        n_noise_peaks = round(self._mz_max - self._mz_min)
         noise_mz, noise_int = self._generate_noise_peaks(
             n=n_noise_peaks, target_mz=target_mz, target_min_distance_mz=0.5
         )
diff --git a/tests/unit/clustering/test_maxmin_sampling.py b/tests/unit/clustering/test_maxmin_sampling.py
index 326eff9..04a10b5 100644
--- a/tests/unit/clustering/test_maxmin_sampling.py
+++ b/tests/unit/clustering/test_maxmin_sampling.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 import pytest
 import numpy as np
-from numpy.testing import assert_array_equal, assert_array_almost_equal
+from numpy.testing import assert_array_equal
 
 from depiction.clustering.maxmin_sampling import maxmin_sampling