diff --git a/.gitignore b/.gitignore
index 66fd4ea..5c03e29 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ build
 *.log
 **/__pycache__
 node_modules*
+.DS_Store
diff --git a/percy/driver_metadata.py b/percy/driver_metadata.py
index 4a42af1..e97d0ca 100644
--- a/percy/driver_metadata.py
+++ b/percy/driver_metadata.py
@@ -12,7 +12,13 @@ def session_id(self):
     def command_executor_url(self):
         url = Cache.get_cache(self.session_id, Cache.command_executor_url)
         if url is None:
-            url = self.driver.command_executor._url # pylint: disable=W0212
+            try:
+                url = self.driver.command_executor._url  # pylint: disable=W0212
+            except (AttributeError, Exception):
+                url = (
+                    self.driver.command_executor.client_config.remote_server_addr
+                )  # pylint: disable=W0212
+
             Cache.set_cache(self.session_id, Cache.command_executor_url, url)
             return url
         return url
diff --git a/percy/version.py b/percy/version.py
index f811561..9215480 100644
--- a/percy/version.py
+++ b/percy/version.py
@@ -1 +1 @@
-__version__ = '2.1.2'
+__version__ = "2.1.3-beta.0"