diff --git a/openhtf/util/test.py b/openhtf/util/test.py
index 54cabb7b..2c794011 100644
--- a/openhtf/util/test.py
+++ b/openhtf/util/test.py
@@ -660,10 +660,11 @@ class TestCase(unittest.TestCase):
 
   def __init__(self, methodName=None):
     super(TestCase, self).__init__(methodName=methodName)
-    test_method = getattr(self, methodName)
-    if inspect.isgeneratorfunction(test_method):
-      raise ValueError('%s yields without @openhtf.util.test.yields_phases' %
-                       methodName)
+    if methodName != 'runTest':
+      test_method = getattr(self, methodName)
+      if inspect.isgeneratorfunction(test_method):
+        raise ValueError('%s yields without @openhtf.util.test.yields_phases' %
+                         methodName)
 
   def setUp(self):
     super(TestCase, self).setUp()
diff --git a/tox.ini b/tox.ini
index 691476e0..d2096d50 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ python =
 [testenv]
 deps = -r{toxinidir}/test_reqs.txt
 commands = {envbindir}/python setup.py build_proto
-    {envbindir}/python setup.py test --pytest-cov=term-missing
+    {envbindir}/python setup.py test --pytest-cov=term-missing,lcov
 # usedevelop causes tox to skip using .tox/dist/openhtf*.zip
 # Instead, it does 'python setup.py develop' which only adds openhtf/ to the
 # path.