diff --git a/Jenkinsfile b/Jenkinsfile
index 4cd8729..265f636 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -12,8 +12,11 @@ pipeline {
                 always {
                     script {
                         utils = new Utils()
+                        utils.publish_coverage('coverage.xml')
+                        utils.publish_coverage_native('index.html')
                         utils.publish_pylint('pylint.out')
                     }
+                    mergeJunitResults()
                 }
             }
         }
diff --git a/pytest.ini b/pytest.ini
new file mode 100644
index 0000000..c184c0f
--- /dev/null
+++ b/pytest.ini
@@ -0,0 +1,2 @@
+[pytest]
+DJANGO_SETTINGS_MODULE = tests.project.settings
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..342da17
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,10 @@
+import pytest
+
+
+@pytest.fixture
+def nocache(settings):
+    settings.CACHES = {
+        'default': {
+            'BACKEND': 'django.core.cache.backends.dummy.DummyCache',
+        }
+    }
diff --git a/tests/project/__init__.py b/tests/project/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests/project/settings.py b/tests/project/settings.py
new file mode 100644
index 0000000..93c3e96
--- /dev/null
+++ b/tests/project/settings.py
@@ -0,0 +1,36 @@
+import os
+
+DATABASES = {
+    'default': {
+        'ENGINE': os.environ.get('DB_ENGINE', 'django.db.backends.postgresql_psycopg2'),
+        'NAME': 'gadjo-test-%s' % os.environ.get("BRANCH_NAME", "").replace('/', '-')[:45],
+    }
+}
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [],
+            'builtins': [
+                'gadjo.templatetags.gadjo',
+            ],
+        },
+    },
+]
+
+
+DEBUG = True
+USE_TZ = True
+INSTALLED_APPS = [
+    "django.contrib.auth",
+    "django.contrib.contenttypes",
+    "django.contrib.sites",
+]
+STATIC_URL = "/static/"
+SITE_ID = 1
+MIDDLEWARE_CLASSES = ()
+LOGGING = {}
+SECRET_KEY = "yay"
diff --git a/tests/test_finder.py b/tests/test_finder.py
new file mode 100644
index 0000000..53dd7ef
--- /dev/null
+++ b/tests/test_finder.py
@@ -0,0 +1,6 @@
+import gadjo.finders
+
+
+def test_finder():
+    finder = gadjo.finders.XStaticFinder()
+    assert len(finder.find(path='', all=True)) == 4
diff --git a/tests/test_templatetags.py b/tests/test_templatetags.py
new file mode 100644
index 0000000..e892d39
--- /dev/null
+++ b/tests/test_templatetags.py
@@ -0,0 +1,34 @@
+import html
+import urllib
+
+from django.template import Context, Template
+from django.test.client import RequestFactory
+
+
+def test_start_timestamp():
+    t = Template('{% start_timestamp %}')
+    assert t.render(Context())
+
+
+def test_querystring():
+    t = Template('{% querystring "name"="Ayers" "age"=20 %}')
+    ctx = Context({'request': RequestFactory().get('/')})
+    assert urllib.parse.parse_qs(urllib.parse.urlparse(html.unescape(t.render(ctx))).query) == {
+        'age': ['20'],
+        'name': ['Ayers'],
+    }
+    ctx = Context({'request': RequestFactory().get('/?age=10')})
+    assert urllib.parse.parse_qs(urllib.parse.urlparse(html.unescape(t.render(ctx))).query) == {
+        'age': ['20'],
+        'name': ['Ayers'],
+    }
+
+    t = Template('{% querystring "name"="Ayers" without "gender" %}')
+    ctx = Context({'request': RequestFactory().get('/')})
+    assert urllib.parse.parse_qs(urllib.parse.urlparse(html.unescape(t.render(ctx))).query) == {
+        'name': ['Ayers']
+    }
+    ctx = Context({'request': RequestFactory().get('/?gender=male')})
+    assert urllib.parse.parse_qs(urllib.parse.urlparse(html.unescape(t.render(ctx))).query) == {
+        'name': ['Ayers']
+    }
diff --git a/tests/test_widgets.py b/tests/test_widgets.py
new file mode 100644
index 0000000..1befaef
--- /dev/null
+++ b/tests/test_widgets.py
@@ -0,0 +1,28 @@
+from django import forms
+from django.template import Context, Template
+from django.test.client import RequestFactory
+from pyquery import PyQuery
+
+from gadjo.forms.widgets import MultiSelectWidget
+
+
+def test_multiselect_widget():
+    class ExampleForm(forms.Form):
+        choices = forms.MultipleChoiceField(
+            label='choices', choices=[('a', 'Aa'), ('b', 'Bb'), ('c', 'Cc')], widget=MultiSelectWidget
+        )
+
+    request = RequestFactory().get('/')
+    t = Template('{{ form|with_template }}')
+    ctx = Context({'request': request, 'form': ExampleForm()})
+    rendered = t.render(ctx)
+    assert len(PyQuery(rendered).find('select')) == 1
+    assert PyQuery(rendered).find('.gadjo-multi-select-widget--button-add')
+
+    request = RequestFactory().get('/?choices=a&choices=b')
+    t = Template('{{ form|with_template }}')
+    ctx = Context({'request': request, 'form': ExampleForm(data=request.GET)})
+    rendered = t.render(ctx)
+    assert len(PyQuery(rendered).find('select')) == 2
+    assert PyQuery(rendered).find('option[selected]').text() == 'Aa Bb'
+    assert ctx['form'].cleaned_data == {'choices': ['a', 'b']}
diff --git a/tox.ini b/tox.ini
index e4d6daa..5ce7e44 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,13 +1,27 @@
 [tox]
-envlist = codestyle-pylint
+envlist = codestyle-coverage-pylint
 toxworkdir = {env:TMPDIR:/tmp}/tox-{env:USER}/gadjo/{env:BRANCH_NAME:}
 
 [testenv]
+usedevelop =
+  coverage: True
+  nocoverage: False
+setenv =
+  SETUPTOOLS_USE_DISTUTILS=stdlib
+  JUNIT=--junitxml=junit-{envname}.xml
+  coverage: COVERAGE=--cov-report xml --cov-report html --cov=gadjo/
 deps =
+  pytest
+  pytest-django
+  WebTest
+  psycopg2-binary
+  psycopg2
   codestyle: pre-commit
+  coverage: pytest-cov
   pylint: pylint
   pylint: pylint-django
   pylint: django>=3.2,<3.3
 commands =
+  pytest {posargs: {env:JUNIT:} {env:COVERAGE:} tests/}
   codestyle: pre-commit run --all-files --show-diff-on-failure
   pylint: ./pylint.sh gadjo/