Spring MockCookie.parse() fails to parse "Version" attribute

I was trying to upgrade to spring-test-6.2.x when most of the unit tests got an error parsing "Version" attribute. Example:

MockCookie.parse("mycookie=mycookie_value; HttpOnly; Version=1");

Results in

java.lang.IllegalArgumentException: Cookie attribute name "Version=1" contains an invalid character for an attribute name
    at jakarta.servlet.http.Cookie.setAttribute(Cookie.java:468)
    at org.springframework.mock.web.MockCookie.setAttribute(MockCookie.java:204)
    at org.springframework.mock.web.MockCookie.parse(MockCookie.java:181)