1 files changed, 9 insertions, 2 deletions
diff --git a/tools/run_tests/report_utils.py b/tools/run_tests/report_utils.py
index 12b1972f1a..35f2069bee 100644
--- a/tools/run_tests/report_utils.py
+++ b/tools/run_tests/report_utils.py
@@ -32,6 +32,7 @@
 try:
   from mako.runtime import Context
   from mako.template import Template
+  from mako import exceptions
 except (ImportError):
   pass  # Mako not installed but it is ok. 
 import os
@@ -103,9 +104,15 @@ def render_interop_html_report(
           'num_failures': num_failures,
           'cloud_to_prod': cloud_to_prod,
           'http2_interop': http2_interop}
+
   html_report_out_dir = 'reports' 
   if not os.path.exists(html_report_out_dir):
     os.mkdir(html_report_out_dir) 
   html_file_path = os.path.join(html_report_out_dir, 'index.html')
-  with open(html_file_path, 'w') as output_file:
-    mytemplate.render_context(Context(output_file, **args))
+  try:
+    with open(html_file_path, 'w') as output_file:
+      mytemplate.render_context(Context(output_file, **args))
+  except:
+    print(exceptions.text_error_template().render())
+    raise
+