diff --git a/tests/test_pub1c-rest.py b/tests/test_pub1c-rest.py
index f0fed14..07ba624 100644
--- a/tests/test_pub1c-rest.py
+++ b/tests/test_pub1c-rest.py
@@ -98,3 +98,19 @@ def test_api_config(client):
     actual.sort()
     assert actual == expected
 
+
+def test_api_module(client):
+    endpoint = '/api/v1/module'
+    # test when module not added
+    response = client.get(endpoint)
+    assert 404 == response.status_code
+    # add module
+    response = client.put(endpoint)
+    assert 200 == response.status_code
+    # test when module added
+    response = client.get(endpoint)
+    assert 200 == response.status_code
+    # try to add module again
+    response = client.put(endpoint)
+    assert 304 == response.status_code
+