diff --git a/openstack/tests/unit/config/test_loader.py b/openstack/tests/unit/config/test_loader.py
new file mode 100644
index 000000000..9772d1a91
--- /dev/null
+++ b/openstack/tests/unit/config/test_loader.py
@@ -0,0 +1,117 @@
+# Copyright 2020 Red Hat, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import os
+import tempfile
+import textwrap
+
+from openstack.config import loader
+from openstack.tests.unit.config import base
+
+FILES = {
+    'yaml': textwrap.dedent('''
+        foo: bar
+        baz:
+            - 1
+            - 2
+            - 3
+    '''),
+    'json': textwrap.dedent('''
+        {
+            "foo": "bar",
+            "baz": [
+                1,
+                2,
+                3
+            ]
+        }
+    '''),
+    'txt': textwrap.dedent('''
+        foo
+        bar baz
+        test
+            one two
+    '''),
+}
+
+
+class TestLoader(base.TestCase):
+
+    def test_base_load_yaml_json_file(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            tested_files = []
+            for key, value in FILES.items():
+                fn = os.path.join(tmpdir, 'file.{ext}'.format(ext=key))
+                with open(fn, 'w+') as fp:
+                    fp.write(value)
+                tested_files.append(fn)
+
+            path, result = loader.OpenStackConfig()._load_yaml_json_file(
+                tested_files)
+            # NOTE(hberaud): Prefer to test path rather than file because
+            # our FILES var is a dict so results are appened
+            # without keeping the initial order (python 3.5)
+            self.assertEqual(tmpdir, os.path.dirname(path))
+
+    def test__load_yaml_json_file_without_json(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            tested_files = []
+            for key, value in FILES.items():
+                if key == 'json':
+                    continue
+                fn = os.path.join(tmpdir, 'file.{ext}'.format(ext=key))
+                with open(fn, 'w+') as fp:
+                    fp.write(value)
+                tested_files.append(fn)
+
+            path, result = loader.OpenStackConfig()._load_yaml_json_file(
+                tested_files)
+            # NOTE(hberaud): Prefer to test path rather than file because
+            # our FILES var is a dict so results are appened
+            # without keeping the initial order (python 3.5)
+            self.assertEqual(tmpdir, os.path.dirname(path))
+
+    def test__load_yaml_json_file_without_json_yaml(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            tested_files = []
+            fn = os.path.join(tmpdir, 'file.txt')
+            with open(fn, 'w+') as fp:
+                fp.write(FILES['txt'])
+            tested_files.append(fn)
+
+            path, result = loader.OpenStackConfig()._load_yaml_json_file(
+                tested_files)
+            self.assertEqual(fn, path)
+
+    def test__load_yaml_json_file_without_perm(self):
+        with tempfile.TemporaryDirectory() as tmpdir:
+            tested_files = []
+            fn = os.path.join(tmpdir, 'file.txt')
+            with open(fn, 'w+') as fp:
+                fp.write(FILES['txt'])
+            os.chmod(fn, 222)
+            tested_files.append(fn)
+
+            path, result = loader.OpenStackConfig()._load_yaml_json_file(
+                tested_files)
+            self.assertEqual(None, path)
+
+    def test__load_yaml_json_file_nonexisting(self):
+        tested_files = []
+        fn = os.path.join('/fake', 'file.txt')
+        tested_files.append(fn)
+
+        path, result = loader.OpenStackConfig()._load_yaml_json_file(
+            tested_files)
+        self.assertEqual(None, path)