Add the KnownFailure plugin in call_nose.py

theano/tests/call_nose.py

@@ -7,14 +7,27 @@ This script should behave the same as the `nosetests` command.
 
 The reason for its existence is that on some systems, it may not be obvious to
 find where nosetests is installed in order to run it in a different process.
-This script is called from `run_tests_in_batch.py`.
-"""
 
+This script is called from `run_tests_in_batch.py`.
 
-import sys
+It is also used to load the KnownFailure plugin, in order to hide
+KnownFailureTests error messages.
+"""
 
 import nose
-
+import sys
 
 if __name__ == '__main__':
-    sys.exit(nose.main())
+    addplugins = []
+    # We include KnownFailure plugin by default, unless
+    # it is disabled by the "--without-knownfailure" arg.
+    if '--without-knownfailure' not in sys.argv:
+        try:
+            from numpy.testing.noseclasses import KnownFailure
+            addplugins.append(KnownFailure())
+        except ImportError:
+            pass
+    else:
+        sys.argv.remove('--without-knownfailure')
+
+    sys.exit(nose.main(addplugins=addplugins))