diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
new file mode 100644
index 0000000..5aca725
--- /dev/null
+++ b/.github/workflows/pythonpackage.yml
@@ -0,0 +1,35 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Python package
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.5, 3.6, 3.7, 3.8]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements-tests.txt
+    - name: Lint with flake8
+      run: |
+        flake8 sshuttle tests --count --show-source --statistics
+    - name: Test with pytest
+      run: |
+        PYTHONPATH=$PWD pytest
diff --git a/sshuttle/client.py b/sshuttle/client.py
index 1f930ae..eebc0d8 100644
--- a/sshuttle/client.py
+++ b/sshuttle/client.py
@@ -224,7 +224,7 @@ class FirewallClient:
                 # No env: Talking to `FirewallClient.start`, which has no i18n.
                 e = None
                 break
-            except OSError as e:
+            except OSError:
                 pass
         self.argv = argv
         s1.close()
@@ -304,8 +304,8 @@ class FirewallClient:
             raise Fatal('%r expected STARTED, got %r' % (self.argv, line))
 
     def sethostip(self, hostname, ip):
-        assert(not re.search(b'[^-\w\.]', hostname))
-        assert(not re.search(b'[^0-9.]', ip))
+        assert(not re.search(rb'[^-\w\.]', hostname))
+        assert(not re.search(rb'[^0-9.]', ip))
         self.pfile.write(b'HOST %s,%s\n' % (hostname, ip))
         self.pfile.flush()
 
diff --git a/sshuttle/server.py b/sshuttle/server.py
index d353a5d..b6f6604 100644
--- a/sshuttle/server.py
+++ b/sshuttle/server.py
@@ -25,7 +25,7 @@ def _ipmatch(ipstr):
     # FIXME: IPv4 only
     if ipstr == 'default':
         ipstr = '0.0.0.0/0'
-    m = re.match('^(\d+(\.\d+(\.\d+(\.\d+)?)?)?)(?:/(\d+))?$', ipstr)
+    m = re.match(r'^(\d+(\.\d+(\.\d+(\.\d+)?)?)?)(?:/(\d+))?$', ipstr)
     if m:
         g = m.groups()
         ips = g[0]
diff --git a/sshuttle/ssh.py b/sshuttle/ssh.py
index 72951f6..464e92c 100644
--- a/sshuttle/ssh.py
+++ b/sshuttle/ssh.py
@@ -114,7 +114,6 @@ def parse_hostport(rhostport):
                 host = parsed.hostname
             port = parsed.port
 
-
     if password is None or len(password) == 0:
         password = None