diff --git a/neo/scripts/runner.py b/neo/scripts/runner.py
index 29730624068333bbad9eb9703fa23dcc38197964..f726709eb799e8db13979a3bbb6e9930aba32605 100755
--- a/neo/scripts/runner.py
+++ b/neo/scripts/runner.py
@@ -184,7 +184,8 @@ class NeoTestRunner(unittest.TestResult):
     def _buildSummary(self, add_status):
         success = self.testsRun - len(self.errors) - len(self.failures)
         add_status('Directory', self.temp_directory)
-        add_status('Status', '%.3f%%' % (success * 100.0 / self.testsRun))
+        if self.testsRun:
+          add_status('Status', '%.3f%%' % (success * 100.0 / self.testsRun))
         for var in os.environ.iterkeys():
             if var.startswith('NEO_TEST'):
                 add_status(var, os.environ[var])