diff --git a/heat/testing/runner.py b/heat/testing/runner.py
index e63049910e..6327cf2d81 100755
--- a/heat/testing/runner.py
+++ b/heat/testing/runner.py
@@ -101,7 +101,6 @@ class _AnsiColorizer(object):
                     curses.setupterm()
                     return curses.tigetnum("colors") > 2
             except Exception:
-                raise
                 # guess false in case of error
                 return False
     supported = classmethod(supported)