diff --git a/aws_lambda_powertools/shared/cookies.py b/aws_lambda_powertools/shared/cookies.py
index 1b57d860201..0e45e2d8a91 100644
--- a/aws_lambda_powertools/shared/cookies.py
+++ b/aws_lambda_powertools/shared/cookies.py
@@ -99,10 +99,10 @@ def __str__(self) -> str:
 
         if self.max_age:
             if self.max_age > 0:
-                payload.write(f"; MaxAge={self.max_age}")
+                payload.write(f"; Max-Age={self.max_age}")
             else:
                 # negative or zero max-age should be set to 0
-                payload.write("; MaxAge=0")
+                payload.write("; Max-Age=0")
 
         if self.http_only:
             payload.write("; HttpOnly")
diff --git a/tests/unit/test_cookie_class.py b/tests/unit/test_cookie_class.py
new file mode 100644
index 00000000000..2b0aa3a37cb
--- /dev/null
+++ b/tests/unit/test_cookie_class.py
@@ -0,0 +1,116 @@
+from datetime import datetime
+
+from aws_lambda_powertools.shared.cookies import Cookie, SameSite
+
+
+def test_cookie_without_secure():
+    # GIVEN a cookie without secure
+    cookie = Cookie(name="powertools", value="test", path="/", secure=False)
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value
+    assert cookie.secure is False
+    assert str(cookie) == "powertools=test; Path=/"
+
+
+def test_cookie_with_path():
+    # GIVEN a cookie with a path
+    cookie = Cookie(name="powertools", value="test", path="/")
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value
+    assert cookie.name == "powertools"
+    assert cookie.value == "test"
+    assert cookie.path == "/"
+    assert str(cookie) == "powertools=test; Path=/; Secure"
+
+
+def test_cookie_with_domain():
+    # GIVEN a cookie with a domain
+    cookie = Cookie(name="powertools", value="test", path="/", domain="example.com")
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value
+    assert cookie.name == "powertools"
+    assert cookie.value == "test"
+    assert cookie.path == "/"
+    assert cookie.domain == "example.com"
+    assert str(cookie) == "powertools=test; Path=/; Domain=example.com; Secure"
+
+
+def test_cookie_with_expires():
+    # GIVEN a cookie with a expires
+    time_to_expire = datetime(year=2022, month=12, day=31)
+    cookie = Cookie(name="powertools", value="test", path="/", expires=time_to_expire)
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value
+    assert cookie.name == "powertools"
+    assert cookie.value == "test"
+    assert cookie.path == "/"
+    assert cookie.expires == time_to_expire
+    assert str(cookie) == "powertools=test; Path=/; Expires=Sat, 31 Dec 2022 00:00:00 GMT; Secure"
+
+
+def test_cookie_with_max_age_positive():
+    # GIVEN a cookie with a positive max age
+    cookie = Cookie(name="powertools", value="test", path="/", max_age=100)
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value
+    assert cookie.name == "powertools"
+    assert cookie.value == "test"
+    assert cookie.path == "/"
+    assert cookie.max_age == 100
+    assert str(cookie) == "powertools=test; Path=/; Max-Age=100; Secure"
+
+
+def test_cookie_with_max_age_negative():
+    # GIVEN a cookie with a negative max age
+    cookie = Cookie(name="powertools", value="test", path="/", max_age=-100)
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value and Max-Age must be 0
+    assert cookie.name == "powertools"
+    assert cookie.value == "test"
+    assert cookie.path == "/"
+    assert str(cookie) == "powertools=test; Path=/; Max-Age=0; Secure"
+
+
+def test_cookie_with_http_only():
+    # GIVEN a cookie with http_only
+    cookie = Cookie(name="powertools", value="test", path="/", http_only=True)
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value
+    assert cookie.name == "powertools"
+    assert cookie.value == "test"
+    assert cookie.path == "/"
+    assert cookie.http_only is True
+    assert str(cookie) == "powertools=test; Path=/; HttpOnly; Secure"
+
+
+def test_cookie_with_same_site():
+    # GIVEN a cookie with same_site
+    cookie = Cookie(name="powertools", value="test", path="/", same_site=SameSite.STRICT_MODE)
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value
+    assert cookie.name == "powertools"
+    assert cookie.value == "test"
+    assert cookie.path == "/"
+    assert cookie.same_site == SameSite.STRICT_MODE
+    assert str(cookie) == "powertools=test; Path=/; Secure; SameSite=Strict"
+
+
+def test_cookie_with_custom_attribute():
+    # GIVEN a cookie with custom_attributes
+    cookie = Cookie(name="powertools", value="test", path="/", custom_attributes=["extra1=value1", "extra2=value2"])
+
+    # WHEN getting the cookie's attributes
+    # THEN the path attribute should be set to the provided value
+    assert cookie.name == "powertools"
+    assert cookie.value == "test"
+    assert cookie.path == "/"
+    assert cookie.custom_attributes == ["extra1=value1", "extra2=value2"]
+    assert str(cookie) == "powertools=test; Path=/; Secure; extra1=value1; extra2=value2"