first commit!
diff --git a/cvp_checks/tests/test_packet_checker.py b/cvp_checks/tests/test_packet_checker.py
new file mode 100644
index 0000000..79915ec
--- /dev/null
+++ b/cvp_checks/tests/test_packet_checker.py
@@ -0,0 +1,83 @@
+import pytest
+import json
+from cvp_checks import utils
+
+
+@pytest.mark.parametrize(
+    "group",
+    utils.get_groups(utils.get_configuration(__file__))
+)
+def test_check_package_versions(local_salt_client, group):
+    config = utils.get_configuration(__file__)
+
+    output = local_salt_client.cmd(group, 'lowpkg.list_pkgs', expr_form='pcre')
+
+    if len(output.keys()) < 2:
+        pytest.skip("Nothing to compare - only 1 node")
+
+    nodes = []
+    pkts_data = []
+    my_set = set()
+
+    for node in output:
+        nodes.append(node)
+        my_set.update(output[node].keys())
+
+    for deb in my_set:
+        diff = []
+        row = []
+        for node in nodes:
+            if deb in output[node].keys():
+                diff.append(output[node][deb])
+                row.append("{}: {}".format(node, output[node][deb]))
+            else:
+                row.append("{}: No package".format(node))
+        if diff.count(diff[0]) < len(nodes):
+            row.sort()
+            row.insert(0, deb)
+            pkts_data.append(row)
+    assert len(pkts_data) <= 1, \
+        "Several problems found for {0} group: {1}".format(
+        group, json.dumps(pkts_data, indent=4))
+
+
+@pytest.mark.parametrize(
+    "group",
+    utils.get_groups(utils.get_configuration(__file__))
+)
+def test_check_module_versions(local_salt_client, group):
+    config = utils.get_configuration(__file__)
+
+    pre_check = local_salt_client.cmd(
+        group, 'cmd.run', ['dpkg -l | grep "python-pip "'], expr_form='pcre')
+    if pre_check.values().count('') > 0:
+        pytest.skip("pip is not installed on one or more nodes")
+    if len(pre_check.keys()) < 2:
+        pytest.skip("Nothing to compare - only 1 node")
+    output = local_salt_client.cmd(group, 'pip.freeze', expr_form='pcre')
+
+    nodes = []
+    pkts_data = []
+    my_set = set()
+
+    for node in output:
+        nodes.append(node)
+        my_set.update([x.split("=")[0] for x in output[node]])
+        output[node] = dict([x.split("==") for x in output[node]])
+
+    for deb in my_set:
+        diff = []
+        row = []
+        for node in nodes:
+            if deb in output[node].keys():
+                diff.append(output[node][deb])
+                row.append("{}: {}".format(node, output[node][deb]))
+            else:
+                row.append("{}: No module".format(node))
+        if diff.count(diff[0]) < len(nodes):
+            row.sort()
+            row.insert(0, deb)
+            pkts_data.append(row)
+    assert len(pkts_data) <= 1, \
+        "Several problems found for {0} group: {1}".format(
+        group, json.dumps(pkts_data, indent=4))