diff --git a/setup.py b/setup.py
index 8eafbbeb851b03cf4153ab303a91741cb1cd5639..0f158cb7cbf033e738330d4c889d62952be294fe 100644
--- a/setup.py
+++ b/setup.py
@@ -24,11 +24,15 @@ class SimpleTestRunner(distutils.cmd.Command):
     @staticmethod
     def _run_tests_in_module(test):
         """Short test runner function - to work also if py.test is not installed."""
+        print("at start")
         test = 'lbmpy_tests.' + test
         mod, function_name = test.rsplit('.', 1)
         if isinstance(mod, str):
+            print("before import ", mod)
             mod = import_module(mod)
+            print("after import ", mod)
 
+        print("before getattr")
         func = getattr(mod, function_name)
         print("   -> %s in %s" % (function_name, mod.__name__))
         with redirect_stdout(io.StringIO()):