There is a reason personality tests keep drawing people. We understand ourselves as stories.
Asked what kind of person they are, people tell a story rather than list traits: this happened, and so I became this way. Weaving a life into a single narrative appears to be the basic way we understand ourselves, because scattered events become manageable once they have a plot.
Memory is not stored like recorded video; it is reconstructed each time it is retrieved. So the same past event can be remembered differently depending on who you currently take yourself to be. People who feel their personality changed tend to remember their past selves as also having been different. This is not lying; it is how memory works. So when recalling something long past, it helps to keep in mind that present interpretation may be mixed in more than the feeling at the time.
Personality tests and type results supply material for building that story. They give you words for yourself, gather scattered experiences under one explanation, and produce a form you can pass on to others. People keep taking them because of that function rather than because the results are accurate. Knowing the structure lets you read a result page differently. Most personality tests commonly taken online, however, are not medical tests or diagnostic tools. Use the results as material for fun and conversation rather than as grounds for judging yourself.
Remembering a few points when reading a result page keeps the fun while reducing the risk of being trapped in the story. The key is to take the result as a question rather than an answer. Retaking a test because you dislike the result and picking the answer you want can itself be a sign that you are looking for material to fit a story you have already settled on.
Once a self-story sets, facts that do not fit stop registering. The sentence 'that is just how I am' is an explanation and a constraint at once. People in fact behave quite differently across situations, and a hardened story files those variations as exceptions. Deliberately recalling counter-examples is enough to open it up again.
If you want to work with your self-story deliberately, writing is the easiest way. Divide your life into a few chapters and give each a title, or pick a handful of turning points and note what changed at each. Rewriting the same event from another person's viewpoint, or from your own a few years on, lets you feel a hardened interpretation loosen. It need not be well written, and no one else needs to see it.
That the story is not fixed is less a burden than room to move. The same events can be woven as evidence of failure or as a process of learning. This does not mean distorting facts; it means the same facts admit more than one reading. A considerable part of what therapy does relates to this rewriting.
Your self-story contains not only parts you made but labels attached long ago by family or people around you. Words heard repeatedly, such as 'you have always been careless', often become a sentence you use to describe yourself without noticing. Simply checking whether that sentence still fits who you are now can win back some authorship of the story. If past events keep troubling the present and are hard to sort out alone, working through the rewriting with a counsellor is another option.