--- /dev/null
+# RUN: %{python} %s quick
+# RUN: %{python} %s slow
+from __future__ import print_function
+
+import time
+import sys
+
+if len(sys.argv) != 2:
+ print("Wrong number of args")
+ sys.exit(1)
+
+mode = sys.argv[1]
+
+if mode == 'slow':
+ print("Running in slow mode")
+ sys.stdout.flush() # Make sure the print gets flushed so it appears in lit output.
+ time.sleep(6)
+ sys.exit(0)
+elif mode == 'quick':
+ print("Running in quick mode")
+ sys.exit(0)
+else:
+ print("Unrecognised mode {}".format(mode))
+ sys.exit(1)