diff --git a/notebooks/03-gravity/weighting_strategies.ipynb b/notebooks/03-gravity/weighting_strategies.ipynb
index c5f5fac..51a19cd 100644
--- a/notebooks/03-gravity/weighting_strategies.ipynb
+++ b/notebooks/03-gravity/weighting_strategies.ipynb
@@ -354,7 +354,7 @@
    },
    "outputs": [],
    "source": [
-    "data_object = data.Data(survey, dobs=dobs, standard_deviation=uncertainties)\n"
+    "data_object = data.Data(survey, dobs=dobs, standard_deviation=uncertainties)"
    ]
   },
   {
@@ -430,7 +430,7 @@
     "model_map = maps.IdentityMap(nP=nC)  # model consists of a value for each active cell\n",
     "\n",
     "# Define and plot starting model\n",
-    "starting_model = np.zeros(nC)\n"
+    "starting_model = np.zeros(nC)"
    ]
   },
   {
@@ -469,7 +469,7 @@
     "# residual between the observed data and the data predicted for a given model.\n",
     "# Within the data misfit, the residual between predicted and observed data are\n",
     "# normalized by the data's standard deviation.\n",
-    "dmis = data_misfit.L2DataMisfit(data=data_object, simulation=simulation)\n"
+    "dmis = data_misfit.L2DataMisfit(data=data_object, simulation=simulation)"
    ]
   },
   {
@@ -1636,7 +1636,7 @@
     "    np.r_[35.0, 0.0, -40.0], 15.0, mesh.gridCC\n",
     ")\n",
     "ind_sphere = ind_sphere[ind_active]\n",
-    "true_model[ind_sphere] = sphere_density\n"
+    "true_model[ind_sphere] = sphere_density"
    ]
   },
   {
diff --git a/notebooks/04-magnetics/fwd_magnetics_induced_3d.ipynb b/notebooks/04-magnetics/fwd_magnetics_induced_3d.ipynb
index c7bc058..593112e 100644
--- a/notebooks/04-magnetics/fwd_magnetics_induced_3d.ipynb
+++ b/notebooks/04-magnetics/fwd_magnetics_induced_3d.ipynb
@@ -245,15 +245,15 @@
     "receiver_list = [receiver_list]\n",
     "\n",
     "# Define the inducing field\n",
-    "inclination = 90   # inclination [deg]\n",
-    "declination = 0    # declination [deg]\n",
+    "inclination = 90  # inclination [deg]\n",
+    "declination = 0  # declination [deg]\n",
     "amplitude = 50000  # amplitude [nT]\n",
     "\n",
     "source_field = magnetics.sources.UniformBackgroundField(\n",
     "    receiver_list=receiver_list,\n",
     "    amplitude=amplitude,\n",
     "    inclination=inclination,\n",
-    "    declination=declination\n",
+    "    declination=declination,\n",
     ")\n",
     "\n",
     "# Define the survey\n",
diff --git a/notebooks/04-magnetics/fwd_magnetics_mvi_3d.ipynb b/notebooks/04-magnetics/fwd_magnetics_mvi_3d.ipynb
index ab7517d..69f1ab9 100644
--- a/notebooks/04-magnetics/fwd_magnetics_mvi_3d.ipynb
+++ b/notebooks/04-magnetics/fwd_magnetics_mvi_3d.ipynb
@@ -247,15 +247,15 @@
     "receiver_list = [receiver_list]\n",
     "\n",
     "# Define the inducing field\n",
-    "field_inclination = 90   # inclination [deg]\n",
-    "field_declination = 0    # declination [deg]\n",
+    "field_inclination = 90  # inclination [deg]\n",
+    "field_declination = 0  # declination [deg]\n",
     "field_amplitude = 50000  # amplitude [nT]\n",
     "\n",
     "source_field = magnetics.sources.UniformBackgroundField(\n",
     "    receiver_list=receiver_list,\n",
     "    amplitude=field_amplitude,\n",
     "    inclination=field_inclination,\n",
-    "    declination=field_declination\n",
+    "    declination=field_declination,\n",
     ")\n",
     "\n",
     "# Define the survey\n",
diff --git a/notebooks/04-magnetics/inv_magnetics_induced_3d.ipynb b/notebooks/04-magnetics/inv_magnetics_induced_3d.ipynb
index 350cea0..0c17dc3 100644
--- a/notebooks/04-magnetics/inv_magnetics_induced_3d.ipynb
+++ b/notebooks/04-magnetics/inv_magnetics_induced_3d.ipynb
@@ -367,15 +367,15 @@
     "receiver_list = [receiver_list]\n",
     "\n",
     "# Define the inducing field\n",
-    "inclination = 90   # inclination [deg]\n",
-    "declination = 0    # declination [deg]\n",
+    "inclination = 90  # inclination [deg]\n",
+    "declination = 0  # declination [deg]\n",
     "amplitude = 50000  # amplitude [nT]\n",
     "\n",
     "source_field = magnetics.sources.UniformBackgroundField(\n",
     "    receiver_list=receiver_list,\n",
     "    amplitude=amplitude,\n",
     "    inclination=inclination,\n",
-    "    declination=declination\n",
+    "    declination=declination,\n",
     ")\n",
     "\n",
     "# Define the survey\n",