Update test to match state of a new test server

Author: PGijsbers

tests/test_study/test_study_functions.py

@@ -227,7 +227,7 @@ def test_study_attach_illegal(self):
         run_list = openml.runs.list_runs(size=10)
         assert len(run_list) == 10
         run_list_more = openml.runs.list_runs(size=20)
-        assert len(run_list_more) == 20
+        assert len(run_list_more) > 10  # a fresh db should have 15 evaluated runs
 
         study = openml.study.create_study(
             alias=None,