diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 000000000..b7106c4ad
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,4 @@
+[run]
+omit =
+    praktikum/praktikum.py
+    praktikum/tests/*
\ No newline at end of file
diff --git a/__init__.py b/praktikum/__init__.py
similarity index 100%
rename from __init__.py
rename to praktikum/__init__.py
diff --git a/bun.py b/praktikum/bun.py
similarity index 100%
rename from bun.py
rename to praktikum/bun.py
diff --git a/burger.py b/praktikum/burger.py
similarity index 100%
rename from burger.py
rename to praktikum/burger.py
diff --git a/database.py b/praktikum/database.py
similarity index 100%
rename from database.py
rename to praktikum/database.py
diff --git a/ingredient.py b/praktikum/ingredient.py
similarity index 100%
rename from ingredient.py
rename to praktikum/ingredient.py
diff --git a/ingredient_types.py b/praktikum/ingredient_types.py
similarity index 100%
rename from ingredient_types.py
rename to praktikum/ingredient_types.py
diff --git a/praktikum.py b/praktikum/praktikum.py
similarity index 100%
rename from praktikum.py
rename to praktikum/praktikum.py
diff --git a/praktikum/tests/__init__.py b/praktikum/tests/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/praktikum/tests/conftest.py b/praktikum/tests/conftest.py
new file mode 100644
index 000000000..81e5f64f6
--- /dev/null
+++ b/praktikum/tests/conftest.py
@@ -0,0 +1,38 @@
+import pytest
+from unittest.mock import Mock
+
+from praktikum.burger import Burger
+from praktikum.bun import Bun
+from praktikum.ingredient import Ingredient
+
+
+@pytest.fixture
+def burger():
+    return Burger()
+
+
+@pytest.fixture
+def bun():
+    return Bun("black bun", 100)
+
+
+@pytest.fixture
+def ingredient():
+    return Ingredient("SAUCE", "hot sauce", 100)
+
+
+@pytest.fixture
+def mock_bun():
+    bun = Mock()
+    bun.get_name.return_value = "black bun"
+    bun.get_price.return_value = 100
+    return bun
+
+
+@pytest.fixture
+def mock_ingredient():
+    ingredient = Mock()
+    ingredient.get_type.return_value = "SAUCE"
+    ingredient.get_name.return_value = "hot sauce"
+    ingredient.get_price.return_value = 100
+    return ingredient
\ No newline at end of file
diff --git a/praktikum/tests/test_bun.py b/praktikum/tests/test_bun.py
new file mode 100644
index 000000000..057ee794a
--- /dev/null
+++ b/praktikum/tests/test_bun.py
@@ -0,0 +1,6 @@
+def test_bun_get_name(bun):
+    assert bun.get_name() == "black bun"
+
+
+def test_bun_get_price(bun):
+    assert bun.get_price() == 100
\ No newline at end of file
diff --git a/praktikum/tests/test_burger.py b/praktikum/tests/test_burger.py
new file mode 100644
index 000000000..4ea57a411
--- /dev/null
+++ b/praktikum/tests/test_burger.py
@@ -0,0 +1,86 @@
+import pytest
+from unittest.mock import Mock
+
+
+def make_ingredient(ingredient_type, name, price):
+    ingredient = Mock()
+    ingredient.get_type.return_value = ingredient_type
+    ingredient.get_name.return_value = name
+    ingredient.get_price.return_value = price
+    return ingredient
+
+
+def test_set_buns_sets_bun(burger, mock_bun):
+    burger.set_buns(mock_bun)
+
+    assert burger.bun == mock_bun
+
+
+def test_add_ingredient_adds_ingredient(burger, mock_ingredient):
+    burger.add_ingredient(mock_ingredient)
+
+    assert burger.ingredients == [mock_ingredient]
+
+
+def test_remove_ingredient_removes_ingredient(burger):
+    ingredient1 = make_ingredient("SAUCE", "hot sauce", 100)
+    ingredient2 = make_ingredient("FILLING", "cutlet", 200)
+
+    burger.ingredients = [ingredient1, ingredient2]
+    burger.remove_ingredient(0)
+
+    assert burger.ingredients == [ingredient2]
+
+
+@pytest.mark.parametrize(
+    "index,new_index,expected",
+    [
+        (0, 2, ["cutlet", "sour cream", "hot sauce"]),
+        (2, 0, ["sour cream", "hot sauce", "cutlet"]),
+    ]
+)
+def test_move_ingredient(burger, index, new_index, expected):
+    burger.ingredients = [
+        make_ingredient("SAUCE", "hot sauce", 100),
+        make_ingredient("FILLING", "cutlet", 200),
+        make_ingredient("SAUCE", "sour cream", 300),
+    ]
+
+    burger.move_ingredient(index, new_index)
+
+    result = [item.get_name() for item in burger.ingredients]
+
+    assert result == expected
+
+
+@pytest.mark.parametrize(
+    "bun_price, ingredients, expected",
+    [
+        (100, [100, 200], 500),
+        (200, [], 400),
+    ]
+)
+def test_get_price(burger, mock_bun, bun_price, ingredients, expected):
+    mock_bun.get_price.return_value = bun_price
+    burger.set_buns(mock_bun)
+
+    for price in ingredients:
+        burger.add_ingredient(make_ingredient("SAUCE", "test", price))
+
+    assert burger.get_price() == expected
+
+
+def test_get_receipt(burger, mock_bun):
+    burger.set_buns(mock_bun)
+    burger.add_ingredient(make_ingredient("SAUCE", "hot sauce", 100))
+    burger.add_ingredient(make_ingredient("FILLING", "cutlet", 200))
+
+    expected = (
+        "(==== black bun ====)\n"
+        "= sauce hot sauce =\n"
+        "= filling cutlet =\n"
+        "(==== black bun ====)\n\n"
+        "Price: 500"
+    )
+
+    assert burger.get_receipt() == expected
\ No newline at end of file
diff --git a/praktikum/tests/test_database.py b/praktikum/tests/test_database.py
new file mode 100644
index 000000000..bd915c7be
--- /dev/null
+++ b/praktikum/tests/test_database.py
@@ -0,0 +1,15 @@
+from praktikum.database import Database
+
+
+def test_available_buns_returns_buns():
+    db = Database()
+    buns = db.available_buns()
+
+    assert len(buns) == 3
+
+
+def test_available_ingredients_returns_ingredients():
+    db = Database()
+    ingredients = db.available_ingredients()
+
+    assert len(ingredients) == 6
\ No newline at end of file
diff --git a/praktikum/tests/test_ingredient.py b/praktikum/tests/test_ingredient.py
new file mode 100644
index 000000000..ee2460d56
--- /dev/null
+++ b/praktikum/tests/test_ingredient.py
@@ -0,0 +1,10 @@
+def test_ingredient_get_name(ingredient):
+    assert ingredient.get_name() == "hot sauce"
+
+
+def test_ingredient_get_price(ingredient):
+    assert ingredient.get_price() == 100
+
+
+def test_ingredient_get_type(ingredient):
+    assert ingredient.get_type() == "SAUCE"
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 000000000..cd50952d8
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,2 @@
+pytest==8.3.2
+pytest-cov==7.1.0
\ No newline at end of file