Central internal_ssl switch

jupyterhub/tests/conftest.py

@@ -74,7 +74,9 @@ def ssl_tmpdir(tmpdir_factory):
 def app(request, io_loop, ssl_tmpdir):
     """Mock a jupyterhub app for testing"""
     mocked_app = None
-    ssl_enabled = getattr(request.module, "ssl_enabled", False)
+    ssl_enabled = request.module.getattr(
+        'ssl_enabled', os.environ.get('SSL_ENABLED', False)
+    )
     kwargs = dict()
     if ssl_enabled:
         kwargs.update(dict(internal_ssl=True, internal_certs_location=str(ssl_tmpdir)))