diff --git a/validations_common/tests/callback_plugins/__init__.py b/validations_common/tests/callback_plugins/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/validations_common/tests/callback_plugins/test_fail_if_no_hosts.py b/validations_common/tests/callback_plugins/test_fail_if_no_hosts.py
new file mode 100644
index 0000000..83f839b
--- /dev/null
+++ b/validations_common/tests/callback_plugins/test_fail_if_no_hosts.py
@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+
+# 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.
+
+"""
+test_fail_if_no_hosts
+----------------------------------
+
+Tests for `fail_if_no_hosts` callback plugin.
+
+"""
+
+
+import validations_common.library.reportentry as validation
+from validations_common.tests import base
+
+from unittest import mock
+
+
+class TestFailIfNoHosts(base.TestCase):
+    def setUp(self):
+        super(TestFailIfNoHosts, self).setUp()
+        self.module = mock.MagicMock()
diff --git a/validations_common/tests/callback_plugins/test_validation_json.py b/validations_common/tests/callback_plugins/test_validation_json.py
new file mode 100644
index 0000000..181e180
--- /dev/null
+++ b/validations_common/tests/callback_plugins/test_validation_json.py
@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+
+# 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.
+
+"""
+test_validation_json
+----------------------------------
+
+Tests for `validation_json` callback plugin.
+
+"""
+
+
+import validations_common.library.reportentry as validation
+from validations_common.tests import base
+
+from unittest import mock
+
+
+class TestValidationJson(base.TestCase):
+    def setUp(self):
+        super(TestValidationJson, self).setUp()
+        self.module = mock.MagicMock()
diff --git a/validations_common/tests/callback_plugins/test_validation_output.py b/validations_common/tests/callback_plugins/test_validation_output.py
new file mode 100644
index 0000000..fd97f6e
--- /dev/null
+++ b/validations_common/tests/callback_plugins/test_validation_output.py
@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+
+# 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.
+
+"""
+test_validation_output
+----------------------------------
+
+Tests for `validation_output` callback plugin.
+
+"""
+
+
+import validations_common.library.reportentry as validation
+from validations_common.tests import base
+
+from unittest import mock
+
+
+class TestValidationOutput(base.TestCase):
+    def setUp(self):
+        super(TestValidationOutput, self).setUp()
+        self.module = mock.MagicMock()
diff --git a/validations_common/tests/callback_plugins/test_validation_stdout.py b/validations_common/tests/callback_plugins/test_validation_stdout.py
new file mode 100644
index 0000000..f7f2c22
--- /dev/null
+++ b/validations_common/tests/callback_plugins/test_validation_stdout.py
@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+
+# 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.
+
+"""
+test_validation_stdout
+----------------------------------
+
+Tests for `validation_stdout` callback plugin.
+
+"""
+
+
+import validations_common.library.reportentry as validation
+from validations_common.tests import base
+
+from unittest import mock
+
+
+class TestValidationStdout(base.TestCase):
+    def setUp(self):
+        super(TestValidationStdout, self).setUp()
+        self.module = mock.MagicMock()