 In experimental tests of Bell locality, care is taken that the experiments on the two systems, from choice of experimental setting to registration of results, take place at spacelike separation. It is assumed that experiments have unique results. The question arises as to when the unique result emerges. It is typically assumed that the result is definite once a detector has been triggered or the result is recorded in a computer memory. However, as Kent (2005) has pointed out, proposals have been made according to which the quantum state of the apparatus would remain in a superposition of terms corresponding to distinct outcomes for a greater length of time. One such proposal is the suggestion that state reduction takes place only when the uncollapsed state involves a superposition of sufficiently distinct gravitational fields (Diósi 1987, Penrose 1989, 1996). Another is Wigner’s suggestion that conscious awareness of the result is required to induce collapse (Wigner 1961). This gives rise to what Kent calls the collapse locality loophole. One can consider theories—Kent calls the family of such theories causal quantum theories—on which collapses are localized events, and the probability of a collapse is independent of events, including other collapses, at spacelike separation from it. A theory of that sort would differ in its predictions from standard quantum theory, but a test to discriminate between such a theory and standard quantum mechanics would require a set-up in which the entire experiment on one system, from arrival to satisfaction of the collapse condition, takes place at spacelike separation from the experiment on the other. If the experiments are taken to end, not when the detector is triggered, but when the difference between outcomes amounts to differences in mass configurations large enough to correspond to significantly distinct gravitational fields, then, as Kent argued, experiments extant at the time of writing (2005) were subject to this loophole. The experiment of Salart et al. (2008) closed the loophole for the particular proposals of Penrose and Diósi, though, as Kent (2018) points out, altering the Penrose-Diósi threshold by a few orders of magnitude would render them compatible with the results of this experiment. No experiment to date has addressed the collapse locality loophole if the collapse condition is taken to be awareness of the result by a conscious observer. See Kent (2018) for proposals of ways in which causal quantum theory could be subjected to more stringent tests.