Creating a query to pull very specific information using four tables
Using the hint Rick James provided, I came up with the following.  I'm not sure about efficiency, but it gives me the results I was looking for.

SELECT
    testData.questionUUID,
    COUNT(testData.answerUUID) AS wrongAnswerCount
FROM testData
    LEFT JOIN answerData ON answerData.uuid=testData.answerUUID
    LEFT JOIN testHistory ON testHistory.uuid=testData.testUUID
WHERE testHistory.userUUID = ?
    AND answerData.answerCorrect=0
GROUP BY testData.questionUUID
HAVING COUNT(testData.answerUUID) &gt; 5
ORDER BY wrongAnswerCount DESC