diff --git a/httprunner/report.py b/httprunner/report.py
index f8aca25e..15e2d424 100644
--- a/httprunner/report.py
+++ b/httprunner/report.py
@@ -235,11 +235,16 @@ def __expand_meta_datas(meta_datas, meta_datas_expanded):
 def __get_total_response_time(meta_datas_expanded):
     """ caculate total response time of all meta_datas
     """
-    response_time = 0
-    for meta_data in meta_datas_expanded:
-        response_time += meta_data["response"]["response_time_ms"]
+    try:
+        response_time = 0
+        for meta_data in meta_datas_expanded:
+            response_time += meta_data["response"]["response_time_ms"]
 
-    return "{:.2f}".format(response_time)
+        return "{:.2f}".format(response_time)
+
+    except TypeError:
+        # failure exists
+        return "N/A"
 
 
 def __stringify_meta_datas(meta_datas):
diff --git a/httprunner/runner.py b/httprunner/runner.py
index 9fef5302..672eb9aa 100644
--- a/httprunner/runner.py
+++ b/httprunner/runner.py
@@ -318,8 +318,12 @@ class Runner(object):
             self.meta_datas = self._run_testcase(test_dict)
         else:
             # api
-            self._run_test(test_dict)
-            self.meta_datas = self.__get_test_data()
+            try:
+                self._run_test(test_dict)
+            except Exception:
+                raise
+            finally:
+                self.meta_datas = self.__get_test_data()
 
     def extract_sessions(self):
         """