diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..b813f0c
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,13 @@
+default:
+  image: python:3.8-alpine
+  before_script:
+    - pip3 install -r librefi/requirements.txt
+    - pip3 install -r librefi/dev_requirements.txt
+
+unit_tests:
+  script:
+    - nosetests tests/*.py
+
+integration_test:
+  script:
+    - python3 -m librefi
diff --git a/librefi/dev_requirements.txt b/librefi/dev_requirements.txt
new file mode 100644
index 0000000..f3c7e8e
--- /dev/null
+++ b/librefi/dev_requirements.txt
@@ -0,0 +1 @@
+nose
diff --git a/tests/querystring.py b/tests/querystring.py
new file mode 100644
index 0000000..0ee62d8
--- /dev/null
+++ b/tests/querystring.py
@@ -0,0 +1,17 @@
+from librefi.utils import dump_qs
+from hashlib import sha512
+
+
+def test_dump():
+    result = dump_qs({
+        "key": "value",
+        "three": 3,
+        "two_and_half": 2.5,
+        "ziobro": [
+            {"kurwo": "jebana"},
+            {"przestań mi": ["kurwa", "rodzinę prześladować"]}],
+    })
+    assert sha512(result.encode("utf-8")).hexdigest(
+        # flake8: noqa: E501
+    ) == '0d0d0598ea18ed0b28b1b4210ac06b742a1cf9a25cb5292db57b9c0cdbcb73bc65d19fa2b7df30dc8281796e3865412760776339a253c10b3025f4b32b187476'
+    pass