diff --git a/wakatime/__init__.py b/wakatime/__init__.py
index 5c9614d..d23b275 100644
--- a/wakatime/__init__.py
+++ b/wakatime/__init__.py
@@ -310,8 +310,9 @@ def send_action(project=None, branch=None, stats=None, key=None, targetFile=None
         if log.isEnabledFor(logging.DEBUG):
             exception_data['traceback'] = traceback.format_exc()
         if offline:
-            queue = Queue()
-            queue.push(data, plugin)
+            if response is not None and response.getcode() != 400 and response.getcode() != 401:
+                queue = Queue()
+                queue.push(data, plugin)
             if log.isEnabledFor(logging.DEBUG):
                 log.warn(exception_data)
             if response is not None and response.getcode() in ALWAYS_LOG_CODES:
@@ -327,8 +328,9 @@ def send_action(project=None, branch=None, stats=None, key=None, targetFile=None
         if log.isEnabledFor(logging.DEBUG):
             exception_data['traceback'] = traceback.format_exc()
         if offline:
-            queue = Queue()
-            queue.push(data, plugin)
+            if response is not None and response.getcode() != 400 and response.getcode() != 401:
+                queue = Queue()
+                queue.push(data, plugin)
             if 'unknown url type: https' in u(sys.exc_info()[1]):
                 log.error(exception_data)
             elif log.isEnabledFor(logging.DEBUG):
@@ -348,8 +350,9 @@ def send_action(project=None, branch=None, stats=None, key=None, targetFile=None
         response_code = response.getcode() if response is not None else None
         response_content = response.read() if response is not None else None
         if offline:
-            queue = Queue()
-            queue.push(data, plugin)
+            if response is not None and response.getcode() != 400 and response.getcode() != 401:
+                queue = Queue()
+                queue.push(data, plugin)
             if log.isEnabledFor(logging.DEBUG):
                 log.warn({
                     'response_code': response_code,