Merge ccf5738 into 3fa8c9e

setup.cfg

@@ -11,6 +11,11 @@ filterwarnings= error::FutureWarning
                 ignore::FutureWarning:chainer\.utils\.experimental
                 error::DeprecationWarning
                 error::PendingDeprecationWarning
+                # TODO(kataoka): ImportWarning, which is ignored by default, may be useful
+                # to find root causes of errors, but usually not important enough to stop
+                # testcases immediately and to hide other warnings and errors. Remove the
+                # entry below after other tests are fixed.
+                default::ImportWarning
                 # NumPy<1.11
                 ignore:in the future np\.array_split will retain the shape of arrays with a zero size:FutureWarning:numpy\.lib\.shape_base
                 # importing old SciPy is warned because it tries to