diff --git a/.circleci/config.yml b/.circleci/config.yml
index f1bbc6f..201cd99 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -24,7 +24,7 @@ test-template: &test-template
           python3 -m flake8
           echo buku | xargs pylint --rcfile tests/.pylintrc
           find . -iname "*.py" ! -path "./api/*" | xargs pylint --rcfile tests/.pylintrc
-          python3 -m pytest ./tests/test_*.py --cov buku -vv --durations=0
+          python3 -m pytest ./tests/test_*.py --cov buku -vv --durations=0 -c ./tests/pytest.ini
 
 jobs:
   py36:
diff --git a/tests/pytest.ini b/tests/pytest.ini
new file mode 100644
index 0000000..4d03895
--- /dev/null
+++ b/tests/pytest.ini
@@ -0,0 +1,3 @@
+[pytest]
+markers =
+  non_tox: not run on tox
diff --git a/tests/test_bukuDb.py b/tests/test_bukuDb.py
index 9962f8b..7affb8e 100644
--- a/tests/test_bukuDb.py
+++ b/tests/test_bukuDb.py
@@ -1327,10 +1327,7 @@ def test_load_firefox_database(firefox_db, add_pt):
     res_yaml_file = firefox_db[1] if add_pt else firefox_db[2]
     if not dump_data:
         with open(res_yaml_file, "r") as f:
-            try:
-                res_yaml = yaml.load(f)
-            except RuntimeError:
-                res_yaml = yaml.load(f, Loader=PrettySafeLoader)
+            res_yaml = yaml.load(f, Loader=PrettySafeLoader)
     # init
     import buku