diff --git a/.coverage b/.coverage
new file mode 100644
index 000000000..e9f7b1c26
Binary files /dev/null and b/.coverage differ
diff --git a/__init__.py b/praktikumm/__init__.py
similarity index 100%
rename from __init__.py
rename to praktikumm/__init__.py
diff --git a/bun.py b/praktikumm/bun.py
similarity index 100%
rename from bun.py
rename to praktikumm/bun.py
diff --git a/burger.py b/praktikumm/burger.py
similarity index 90%
rename from burger.py
rename to praktikumm/burger.py
index 2b3b6a88b..a0d377b32 100644
--- a/burger.py
+++ b/praktikumm/burger.py
@@ -1,8 +1,6 @@
 from typing import List
-
-from praktikum.bun import Bun
-from praktikum.ingredient import Ingredient
-
+from praktikumm.bun import Bun
+from praktikumm.ingredient import Ingredient
 
 class Burger:
     """
@@ -38,11 +36,9 @@ def get_price(self) -> float:
 
     def get_receipt(self) -> str:
         receipt: List[str] = [f'(==== {self.bun.get_name()} ====)']
-
         for ingredient in self.ingredients:
             receipt.append(f'= {str(ingredient.get_type()).lower()} {ingredient.get_name()} =')
-
-        receipt.append(f'(==== {self.bun.get_name()} ====)\n')
+        receipt.append(f'(==== {self.bun.get_name()} ====)')
         receipt.append(f'Price: {self.get_price()}')
 
         return '\n'.join(receipt)
diff --git a/database.py b/praktikumm/database.py
similarity index 86%
rename from database.py
rename to praktikumm/database.py
index 4c75baf71..6ee227dab 100644
--- a/database.py
+++ b/praktikumm/database.py
@@ -1,8 +1,7 @@
 from typing import List
-
-from praktikum.bun import Bun
-from praktikum.ingredient import Ingredient
-from praktikum.ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
+from praktikumm.bun import Bun
+from praktikumm.ingredient import Ingredient
+from praktikumm.ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
 
 
 class Database:
diff --git a/ingredient.py b/praktikumm/ingredient.py
similarity index 100%
rename from ingredient.py
rename to praktikumm/ingredient.py
diff --git a/ingredient_types.py b/praktikumm/ingredient_types.py
similarity index 100%
rename from ingredient_types.py
rename to praktikumm/ingredient_types.py
diff --git a/praktikum.py b/praktikumm/praktikum.py
similarity index 87%
rename from praktikum.py
rename to praktikumm/praktikum.py
index ec522fa6d..7852d8f0a 100644
--- a/praktikum.py
+++ b/praktikumm/praktikum.py
@@ -1,9 +1,8 @@
 from typing import List
-
-from praktikum.bun import Bun
-from praktikum.burger import Burger
-from praktikum.database import Database
-from praktikum.ingredient import Ingredient
+from praktikumm.bun import Bun
+from praktikumm.burger import Burger
+from praktikumm.database import Database
+from praktikumm.ingredient import Ingredient
 
 
 def main():
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 000000000..9c1634658
Binary files /dev/null and b/requirements.txt differ
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/tests/test_bun.py b/tests/test_bun.py
new file mode 100644
index 000000000..eadda0ecc
--- /dev/null
+++ b/tests/test_bun.py
@@ -0,0 +1,10 @@
+import pytest
+from praktikumm.bun import Bun
+
+def test_bun_get_name():
+    bun = Bun("white", 200)
+    assert bun.get_name() == "white"
+
+def test_bun_get_price():
+    bun = Bun("black", 100)
+    assert bun.get_price() == 100
\ No newline at end of file
diff --git a/tests/test_burger.py b/tests/test_burger.py
new file mode 100644
index 000000000..1ca3545f2
--- /dev/null
+++ b/tests/test_burger.py
@@ -0,0 +1,52 @@
+import pytest
+from unittest.mock import Mock
+from praktikumm.burger import Burger
+from praktikumm.bun import Bun
+from praktikumm.ingredient import Ingredient
+
+@pytest.fixture
+def burger():
+    return Burger()
+
+def test_set_buns(burger):
+    bun = Bun("black bun", 100)
+    burger.set_buns(bun)
+    assert burger.bun == bun
+
+@pytest.mark.parametrize("ingredient_type, name, price", [
+    ("SAUCE", "hot sauce", 100),
+    ("FILLING", "sausage", 300)
+])
+def test_add_ingredient(burger, ingredient_type, name, price):
+    ingredient = Ingredient(ingredient_type, name, price)
+    burger.add_ingredient(ingredient)
+    assert len(burger.ingredients) == 1
+    assert burger.ingredients[0] == ingredient
+
+def test_remove_ingredient(burger):
+    ingredient = Ingredient("SAUCE", "sour cream", 150)
+    burger.add_ingredient(ingredient)
+    idx = 0
+    burger.remove_ingredient(idx)
+    assert len(burger.ingredients) == 0
+
+def test_get_price_with_mock(burger):
+    bun = Mock()
+    bun.get_price.return_value = 60
+    burger.set_buns(bun)
+
+    ingredient = Mock()
+    ingredient.get_price.return_value = 60
+    burger.add_ingredient(ingredient)
+
+    expected = 60 * 2 + 60  # <-- исправлено
+    assert burger.get_price() == expected
+
+def test_get_receipt(burger):
+    bun = Bun("white bun", 200)
+    burger.set_buns(bun)
+    ingredient = Ingredient("SAUCE", "chili sauce", 300)
+    burger.add_ingredient(ingredient)
+
+    expected = "(==== white bun ====)\n= sauce chili sauce =\n(==== white bun ====)\nPrice: 700"
+    assert burger.get_receipt() == expected
\ No newline at end of file
diff --git a/tests/test_database.py b/tests/test_database.py
new file mode 100644
index 000000000..7e47e58a7
--- /dev/null
+++ b/tests/test_database.py
@@ -0,0 +1,29 @@
+import pytest
+from praktikumm.database import Database
+from praktikumm.bun import Bun
+from praktikumm.ingredient import Ingredient
+
+def test_available_buns():
+    db = Database()
+    buns = db.available_buns()
+    assert len(buns) == 3
+    assert isinstance(buns[0], Bun)
+
+def test_available_ingredients():
+    db = Database()
+    ingredients = db.available_ingredients()
+    assert len(ingredients) == 6
+    assert isinstance(ingredients[0], Ingredient)
+
+def test_buns_have_correct_data():
+    db = Database()
+    bun = db.available_buns()[0]
+    assert bun.get_name() == "black bun"
+    assert bun.get_price() == 100
+
+def test_ingredients_have_correct_data():
+    db = Database()
+    ingredient = db.available_ingredients()[0]
+    assert ingredient.get_type() == "SAUCE"
+    assert ingredient.get_name() == "hot sauce"
+    assert ingredient.get_price() == 100
\ No newline at end of file
diff --git a/tests/test_ingredient.py b/tests/test_ingredient.py
new file mode 100644
index 000000000..5ed8298d1
--- /dev/null
+++ b/tests/test_ingredient.py
@@ -0,0 +1,14 @@
+import pytest
+from praktikumm.ingredient import Ingredient
+
+def test_ingredient_get_name():
+    ingredient = Ingredient("SAUCE", "hot sauce", 100)
+    assert ingredient.get_name() == "hot sauce"
+
+def test_ingredient_get_price():
+    ingredient = Ingredient("FILLING", "sausage", 300)
+    assert ingredient.get_price() == 300
+
+def test_ingredient_get_type():
+    ingredient = Ingredient("SAUCE", "sour cream", 150)
+    assert ingredient.get_type() == "SAUCE"
\ No newline at end of file