diff --git a/src/actions/pytest.py b/src/actions/pytest.py
new file mode 100644
index 0000000..f916148
--- /dev/null
+++ b/src/actions/pytest.py
@@ -0,0 +1,47 @@
+"""Run unit tests."""
+
+# standard library
+import os
+import subprocess
+
+# third party
+import pytest
+
+# first party
+import delphi.github_deploy_repo.file_operations as file_operations
+
+class Plugin:
+  def __init__(self):
+    self.summary={
+      "passed":0,
+      "failed":0,
+      "skipped":0,
+      "errors":0
+    }
+  def pytest_runtest_logreport(self, report):
+    self.summary[report.outcome] += 1
+  def pytest_internalerror(self, *args, **kwargs):
+    self.summary["errors"] += 1
+  def pytest_exception_interact(self, *args, **kwargs):
+    self.summary["errors"] += 1
+
+def pytest(repo_link, commit, path, row, substitutions):
+  # pytest [dir]
+
+  # parse arguments
+  if 'dir' in row:
+    location = file_operations.get_file(row['dir'], path, substitutions)[0]
+  else:
+    location = os.path.join(path, 'tests')
+  pattern = '^(test_.*|.*_test)\\.py$'
+
+  # run tests and gather results
+  p = Plugin()
+  pytest.main([location, 'no:terminal'], plugins=[p])
+  bad = p.summary['failed'] + p.summary['errors']
+  if bad > 0:
+    raise Exception('%d test(s) did not pass' % bad)
+  elif p.summary['passed'] == 0:
+    print('no tests found')
+  else:
+    print('%d test(s) passed!' % p.summary['passed'])
diff --git a/src/github_deploy_repo.py b/src/github_deploy_repo.py
index 10cdf05..ab2957f 100644
--- a/src/github_deploy_repo.py
+++ b/src/github_deploy_repo.py
@@ -34,6 +34,7 @@
 from delphi.github_deploy_repo.actions.copymove import copymove
 from delphi.github_deploy_repo.actions.minimize_js import minimize_js
 from delphi.github_deploy_repo.actions.py3test import py3test
+from delphi.github_deploy_repo.actions.pytest import pytest
 import delphi.github_deploy_repo.database as database
 import delphi.operations.secrets as secrets
 import delphi.utils.extractor as extractor
@@ -111,6 +112,7 @@ def execute(repo_link, commit, path, config):
     'compile-coffee': compile_coffee,
     'minimize-js': minimize_js,
     'py3test': py3test,
+    'pytest': pytest
   }
   for (idx, row) in enumerate(actions):
     # each row should be either: a map/dict/object with a string field named