diff --git a/python/plugins/processing/tests/AlgorithmsTestBase.py b/python/plugins/processing/tests/AlgorithmsTestBase.py
index 8d0e50845de0..5f6ec8520828 100644
--- a/python/plugins/processing/tests/AlgorithmsTestBase.py
+++ b/python/plugins/processing/tests/AlgorithmsTestBase.py
@@ -83,7 +83,8 @@ def check_algorithm(self, name, defs):
         :param defs: A python dict containing a test algorithm definition
         """
         QgsMapLayerRegistry.instance().removeAllMapLayers()
-
+        print('DEBUG on {}'.format(name))
+        print('Params = {}'.format(defs))
         params = self.load_params(defs['params'])
         alg = processing.Processing.getAlgorithm(defs['algorithm']).getCopy()
 
@@ -168,7 +169,6 @@ def load_layer(self, param):
         Loads a layer which was specified as parameter.
         """
         filepath = self.filepath_from_param(param)
-
         if param['type'] == 'vector':
             lyr = QgsVectorLayer(filepath, param['name'], 'ogr')
         elif param['type'] == 'raster':
@@ -185,13 +185,14 @@ def filepath_from_param(self, param):
         prefix = processingTestDataPath()
         if 'location' in param and param['location'] == 'qgs':
             prefix = unitTestDataPath()
-
+        print('DEBUG filepath_from_param: {} -> {}'.format(param['name'], os.path.join(prefix, param['name'])))
         return os.path.join(prefix, param['name'])
 
     def check_results(self, results, expected):
         """
         Checks if result produced by an algorithm matches with the expected specification.
         """
+        print('DEBUG check_results: results {}\n\texpected {}'.format(results, expected))
         for id, expected_result in expected.items():
             if 'vector' == expected_result['type']:
                 expected_lyr = self.load_layer(expected_result)