diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3a26fef..0d8c7ef 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,8 +5,8 @@ jobs:
   test:
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
-        python-ver: [3.7, 3.8, 3.9, '3.10', 3.11, 3.12]
+        os: [ubuntu-latest, windows-latest]
+        python-ver: [3.8, 3.9, '3.10', 3.11, 3.12]
 
     runs-on: ${{ matrix.os }}
 
diff --git a/sksurgerynditracker/nditracker.py b/sksurgerynditracker/nditracker.py
index f3655d9..176aa06 100644
--- a/sksurgerynditracker/nditracker.py
+++ b/sksurgerynditracker/nditracker.py
@@ -61,8 +61,7 @@ def _get_serial_port_name(configuration):
         serial_ports = list_ports.comports()
         result = None
         name = None
-        if ports_to_probe > len(serial_ports):
-            ports_to_probe = len(serial_ports)
+        ports_to_probe = min(ports_to_probe, len(serial_ports))
 
         if serial_port is None:
             for port_no in range(ports_to_probe):
@@ -88,8 +87,9 @@ def _get_serial_port_name(configuration):
                     print("Probing port: ", serial_port, " got name: ", name,
                           " Result: ", result, file=fileout)
                 else:
-                    raise IOError(f'Could not connect to serial port {serial_port} '
-                        f'as there are only {len(serial_ports)} ports available.'
+                    raise IOError(f'Could not connect to serial port'
+                        f'{serial_port} as there are '
+                        f'only {len(serial_ports)} ports available.'
                         + serial_connection_errmsg)
 
             if isinstance(serial_port, str):
@@ -97,9 +97,10 @@ def _get_serial_port_name(configuration):
                 result = ndicapy.ndiProbe(name)
                 print("Probing port: ", name,
                       " Result: ", result, file=fileout)
-                    
+
             if result != ndicapy.NDI_OKAY:
-                raise IOError(f'Could not connect to an NDI device on the chosen port, {serial_port}.'
+                raise IOError(f'Could not connect to an NDI device on '
+                    f'the chosen port, {serial_port}.'
                     + serial_connection_errmsg)
         return name
 
diff --git a/tests/pylintrc b/tests/pylintrc
index cc5da78..d350f78 100644
--- a/tests/pylintrc
+++ b/tests/pylintrc
@@ -13,7 +13,7 @@ ignore=CVS
 
 # Add files or directories matching the regex patterns to the blacklist. The
 # regex matches against base names, not paths.
-ignore-patterns=
+ignore-patterns=_version.py
 
 # Pickle collected data for later comparisons.
 persistent=yes
diff --git a/tests/test_listports.py b/tests/test_listports.py
index 46c8786..4f6e19f 100644
--- a/tests/test_listports.py
+++ b/tests/test_listports.py
@@ -21,8 +21,7 @@ def test_list_ports():
         ndi_port_names.append(ndiDeviceName(port_number))
         try:
             windows_port_number = int(serial_port.device.replace('COM', ''))
-            if windows_port_number > max_com_port:
-                max_com_port = windows_port_number
+            max_com_port = max(max_com_port, windows_port_number)
         except ValueError:
             # we're probably not on windows, so don't care
             pass
diff --git a/tox.ini b/tox.ini
index d425668..98d2857 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,12 +1,12 @@
 # content of: tox.ini , put in same dir as setup.py
 [tox]
-envlist = py37,lint
+envlist = py310,lint
 skipsdist = True
 requires = setuptools >= 47.1
 
 [travis]
 python =
-  3.7: py37, docs, lint
+  3.10: py310, docs, lint
 
 [testenv]
 deps=-rrequirements-dev.txt
@@ -17,22 +17,22 @@ commands = coverage erase
            coverage report -m
 
 [testenv:lint]
-basepython=python3.7
+basepython=python3.10
 deps=pylint
      {[testenv]deps}
 commands=pylint --rcfile=tests/pylintrc sksurgerynditracker tests
 
 [testenv:docs]
-basepython=python3.7
+basepython=python3.10
 changedir = docs
 commands = sphinx-build -M html . build
 
 [testenv:installer]
-basepython=python3.7
+basepython=python3.10
 commands=python -c "print('Installer not needed for this project.')"
 
 [testenv:pip3]
-basepython=python3.7
+basepython=python3.10
 changedir=pip_test
 skip_install=True
 commands = pip install {posargs}