diff --git a/watchlist/tests.py b/watchlist/tests.py
deleted file mode 100644
index 7ce503c..0000000
--- a/watchlist/tests.py
+++ /dev/null
@@ -1,3 +0,0 @@
-from django.test import TestCase
-
-# Create your tests here.
diff --git a/watchlist/tests/__init__.py b/watchlist/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/watchlist/tests/test_models.py b/watchlist/tests/test_models.py
new file mode 100644
index 0000000..640104a
--- /dev/null
+++ b/watchlist/tests/test_models.py
@@ -0,0 +1,77 @@
+from django.test import TestCase
+
+from watchlist.models import IMDB_ID_RE, CSFD_ID_RE
+
+class IMDBIDTest(TestCase):
+
+    def test_valid_imdb_id(self):
+        valid = [
+            "tt0000000",
+            "tt1234567",
+            "tt4975722",
+            "tt3581920"
+        ]
+        for testId in valid:
+            with self.subTest(testId=testId):
+                self.assertTrue(IMDB_ID_RE.match(testId))
+    
+    def test_invalid_imdb_id(self):
+        invalid = [
+            "tt",
+            "tt1",
+            "1234567"
+            "tt123456",
+            "-tt1234567",
+            ""
+        ]
+        for testId in invalid:
+            with self.subTest(testId=testId):
+                self.assertFalse(IMDB_ID_RE.match(testId))
+
+    def test_url_extraction(self):
+        urls = [
+            ("https://www.imdb.com/title/tt4925292/?ref_=hm_rvi_tt_i_1", "tt4925292"),
+            ("https://www.imdb.com/title/tt5580390/", "tt5580390"),
+        ]
+        for url, result in urls:
+            with self.subTest(url=url, result=result):
+                m = IMDB_ID_RE.search(url)
+                self.assertTrue(m)
+                self.assertEqual(m.group(), result)
+
+class CSFDIDTest(TestCase):
+
+    def test_valid_csfd_id(self):
+        valid = [
+            "1",
+            "123",
+            "969361"
+
+        ]
+        for testId in valid:
+            with self.subTest(testId=testId):
+                self.assertTrue(CSFD_ID_RE.match(testId))
+    
+    def test_invalid_csfd_id(self):
+        invalid = [
+            "abc",
+            "-1",
+            "0",
+            "tt0000000",
+            "",
+        ]
+        for testId in invalid:
+            with self.subTest(testId=testId):
+                self.assertFalse(CSFD_ID_RE.match(testId))
+
+    def test_url_extraction(self):
+        urls = [
+            ("https://www.csfd.cz/film/1-predevsim-nikomu-neublizim/recenze/", "1"),
+            ("https://www.csfd.cz/film/969361-velryba/prehled/", "969361"),
+            ("https://www.csfd.cz/film/370706-daredevil/galerie/?page=20", "370706")
+        ]
+        for url, result in urls:
+            with self.subTest(url=url, result=result):
+                m = CSFD_ID_RE.search(url)
+                self.assertTrue(m)
+                self.assertEqual(m.group(), result)