diff --git a/novaclient/v1_1/coverage_ext.py b/novaclient/v1_1/coverage_ext.py
index f0b099e1d..6364da419 100644
--- a/novaclient/v1_1/coverage_ext.py
+++ b/novaclient/v1_1/coverage_ext.py
@@ -41,7 +41,7 @@ class CoverageManager(base.ManagerWithFind):
         url = '/os-coverage/action'
         return self.api.client.post(url, body=body)
 
-    def report(self, filename, xml=False, html=True):
+    def report(self, filename, xml=False, html=False):
         body = {
             'report': {
                 'file': filename,