Better check suggested in code review

theano/sparse/tests/test_basic.py

@@ -1773,11 +1773,13 @@ class Remove0Tester(utt.InferShapeTester):
             if theano.config.mode not in ['FAST_COMPILE']:
                 # list of apply nodes in the optimized graph.
                 nodes = f.maker.fgraph.toposort()
-                for node in nodes:
-                    if isinstance(node.op, Remove0):
-                        assert node.op.inplace, ('Inplace optimization should '
-                                                 'have been applied.')
-
+                # Check there isn't any Remove0 instance not inplace.
+                assert not any([isinstance(node.op, Remove0) and
+                                not node.op.inplace for node in nodes]), (
+                       'Inplace optimization should have been applied')
+                # Check there is at least one Remove0 inplace.
+                assert any([isinstance(node.op, Remove0) and node.op.inplace
+                            for node in nodes])
             # checking
             # makes sense to change its name
             target = mat