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diff --git a/ingredient.py b/praktikum/ingredient.py
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diff --git a/ingredient_types.py b/praktikum/ingredient_types.py
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diff --git a/tests/test_bun.py b/tests/test_bun.py
new file mode 100644
index 000000000..cb69040d9
--- /dev/null
+++ b/tests/test_bun.py
@@ -0,0 +1,12 @@
+from praktikum.bun import Bun
+
+
+class TestBun:
+
+    def test_return_bun_name(self):
+        bun = Bun("black bun", 100)
+        assert bun.get_name() == "black bun"
+
+    def test_return_bun_price(self):
+        bun = Bun("black bun", 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..f49e1a6ec
--- /dev/null
+++ b/tests/test_burger.py
@@ -0,0 +1,69 @@
+from unittest.mock import Mock
+from praktikum.burger import Burger
+from praktikum.bun import Bun
+from praktikum.ingredient import Ingredient
+from praktikum.ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
+
+class TestBurger:
+
+    def test_set_buns(self):
+        burger = Burger()
+        bun = Bun("black bun", 100)
+        burger.set_buns(bun)
+        assert burger.bun == bun
+
+    def test_add_ingredient_to_list(self):
+        burger = Burger()
+        ingredient = Ingredient(INGREDIENT_TYPE_SAUCE,"hot sauce",100)
+        burger.add_ingredient(ingredient)
+        assert burger.ingredients == [ingredient]
+
+    def test_remove_ingredient_from_list(self):
+        burger = Burger()
+        ingredient_1 = Ingredient(INGREDIENT_TYPE_SAUCE,"hot sauce",100)
+        ingredient_2 = Ingredient(INGREDIENT_TYPE_FILLING,"cutlet",200)
+        burger.add_ingredient(ingredient_1)
+        burger.add_ingredient(ingredient_2)
+        burger.remove_ingredient(0)
+        assert burger.ingredients == [ingredient_2]
+
+    def test_move_ingredient(self):
+        burger = Burger()
+        ingredient_1 = Ingredient(INGREDIENT_TYPE_SAUCE,"hot sauce",100)
+        ingredient_2 = Ingredient(INGREDIENT_TYPE_FILLING,"cutlet",200)
+        burger.add_ingredient(ingredient_1)
+        burger.add_ingredient(ingredient_2)
+        burger.move_ingredient(0, 1)
+        assert burger.ingredients == [ingredient_2, ingredient_1]
+
+    def test_get_total_price(self):
+        burger = Burger()
+        bun = Mock()
+        bun.get_price.return_value = 100
+        ingredient_1 = Mock()
+        ingredient_1.get_price.return_value = 100
+        ingredient_2 = Mock()
+        ingredient_2.get_price.return_value = 200
+        burger.set_buns(bun)
+        burger.add_ingredient(ingredient_1)
+        burger.add_ingredient(ingredient_2)
+        assert burger.get_price() == 500
+
+    def test_get_receipt(self):
+        burger = Burger()
+        bun = Mock()
+        bun.get_name.return_value = "black bun"
+        bun.get_price.return_value = 100
+        ingredient = Mock()
+        ingredient.get_name.return_value = "hot sauce"
+        ingredient.get_type.return_value = "SAUCE"
+        ingredient.get_price.return_value = 100
+        burger.set_buns(bun)
+        burger.add_ingredient(ingredient)
+        expected_receipt = (
+            "(==== black bun ====)\n"
+            "= sauce hot sauce =\n"
+            "(==== black bun ====)\n\n"
+            "Price: 300"
+        )
+        assert burger.get_receipt() == expected_receipt
\ No newline at end of file
diff --git a/tests/test_database.py b/tests/test_database.py
new file mode 100644
index 000000000..1b6af1ec6
--- /dev/null
+++ b/tests/test_database.py
@@ -0,0 +1,26 @@
+from praktikum.database import Database
+
+class TestDatabase:
+
+    def test_available_buns_returns_all_buns(self):
+        database = Database()
+        buns = database.available_buns()
+        bun_names = [bun.get_name() for bun in buns]
+        assert bun_names == [
+            "black bun",
+            "white bun",
+            "red bun"
+        ]
+
+    def test_available_ingredients_returns_all_ingredients(self):
+        database = Database()
+        ingredients = database.available_ingredients()
+        ingredient_names = [ingredient.get_name()for ingredient in ingredients]
+        assert ingredient_names == [
+            "hot sauce",
+            "sour cream",
+            "chili sauce",
+            "cutlet",
+            "dinosaur",
+            "sausage"
+        ]
\ No newline at end of file
diff --git a/tests/test_ingredient.py b/tests/test_ingredient.py
new file mode 100644
index 000000000..daf9d05e5
--- /dev/null
+++ b/tests/test_ingredient.py
@@ -0,0 +1,28 @@
+import pytest
+
+from praktikum.ingredient import Ingredient
+from praktikum.ingredient_types import INGREDIENT_TYPE_SAUCE, INGREDIENT_TYPE_FILLING
+
+
+class TestIngredient:
+
+    @pytest.mark.parametrize(
+        "ingredient_type",
+        [
+            INGREDIENT_TYPE_SAUCE,
+            INGREDIENT_TYPE_FILLING
+        ]
+    )
+    def test_get_type_returns_ingredient_type(self, ingredient_type):
+        ingredient = Ingredient(ingredient_type, "ketchup", 50)
+        assert ingredient.get_type() == ingredient_type
+
+
+    def test_get_name_returns_ingredient_name(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_SAUCE,"ketchup",50)
+        assert ingredient.get_name() == "ketchup"
+
+
+    def test_get_price_returns_ingredient_price(self):
+        ingredient = Ingredient(INGREDIENT_TYPE_SAUCE,"ketchup",50)
+        assert ingredient.get_price() == 50
\ No newline at end of file