This article introduces three important challenges and possible solutions when using spoken dialogue to measure the use of specific multiword expressions. The first challenge is deciding whether to count precise and accurate use of target expressions only or whether to extend the count to include variation. The second challenge requires addressing the indirect nature of dialogue as a testing method. The third challenge is organizing data and preparing ways to clearly identify speakers within the dialogue. These challenges are illustrated with examples and potential solutions from my recent research investigating spoken use of multi-word expressions.