diff --git a/examples/01_basic_example.ipynb b/examples/01_basic_example.ipynb
index 1fe60b4d..52fa35f0 100644
--- a/examples/01_basic_example.ipynb
+++ b/examples/01_basic_example.ipynb
@@ -34,7 +34,7 @@
    "source": [
     "plt.style.use('./base_style.mplstyle')\n",
     "import shutil\n",
-    "usetex = shutil.which('latex') != ''\n",
+    "usetex = shutil.which('latex') not in ('', None)\n",
     "plt.rc('text', usetex=usetex)"
    ]
   },
diff --git a/examples/02_correlators.ipynb b/examples/02_correlators.ipynb
index b86cb5b9..6f396ff7 100644
--- a/examples/02_correlators.ipynb
+++ b/examples/02_correlators.ipynb
@@ -22,7 +22,7 @@
    "source": [
     "plt.style.use('./base_style.mplstyle')\n",
     "import shutil\n",
-    "usetex = shutil.which('latex') != ''\n",
+    "usetex = shutil.which('latex') not in ('', None)\n",
     "plt.rc('text', usetex=usetex)"
    ]
   },
diff --git a/examples/03_pcac_example.ipynb b/examples/03_pcac_example.ipynb
index 87d081be..3fc38020 100644
--- a/examples/03_pcac_example.ipynb
+++ b/examples/03_pcac_example.ipynb
@@ -20,7 +20,7 @@
    "source": [
     "plt.style.use('./base_style.mplstyle')\n",
     "import shutil\n",
-    "usetex = shutil.which('latex') != ''\n",
+    "usetex = shutil.which('latex') not in ('', None)\n",
     "plt.rc('text', usetex=usetex)"
    ]
   },
diff --git a/examples/04_fit_example.ipynb b/examples/04_fit_example.ipynb
index 868de9bf..628506a5 100644
--- a/examples/04_fit_example.ipynb
+++ b/examples/04_fit_example.ipynb
@@ -20,7 +20,7 @@
    "source": [
     "plt.style.use('./base_style.mplstyle')\n",
     "import shutil\n",
-    "usetex = shutil.which('latex') != ''\n",
+    "usetex = shutil.which('latex') not in ('', None)\n",
     "plt.rc('text', usetex=usetex)"
    ]
   },
diff --git a/examples/06_gevp.ipynb b/examples/06_gevp.ipynb
index 867237bb..3e6c12d5 100644
--- a/examples/06_gevp.ipynb
+++ b/examples/06_gevp.ipynb
@@ -21,7 +21,7 @@
    "source": [
     "plt.style.use('./base_style.mplstyle')\n",
     "import shutil\n",
-    "usetex = shutil.which('latex') != ''\n",
+    "usetex = shutil.which('latex') not in ('', None)\n",
     "plt.rc('text', usetex=usetex)"
    ]
   },