This is a retest of Test 247 to see if keywords in the h2 and h3 tags still affect rank.
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Test 439. Then, do H2s and H3s affect rank? John Mueller, in Twitter, was saying H2s and H1s and all that stuff doesn't matter but every time we test it, clearly, it indicates that. So, he's got H2s and some of his test pages got H3s. They always outrank the control. If it's outranking the controls – if there's smoke there's fire. It's there.
So, I would say that disregard John Mueller and start putting your keywords inside H1s, H2s and H3s if you are not doing int and then clean those up and remove the irrelevant ones outside of there so that you stay on that outline format with your heavy text.