diff --git a/tests/particle/noisy_ar1_nlf_apf.mod b/tests/particle/noisy_ar1_nlf_apf.mod
index a54a454b37fe9b9a187882d086f9ded6f06c1e2e..c006b6cb1551844ed828377ba39304dd44956106 100644
--- a/tests/particle/noisy_ar1_nlf_apf.mod
+++ b/tests/particle/noisy_ar1_nlf_apf.mod
@@ -36,7 +36,7 @@ options_.particle.status = 1; // Required because we intend to use a nonlinear f
            mode_file=noisy,
            datafile=noisy_ar1_data,
            order=1,
-           number_of_particles = 20000000,
+           number_of_particles = 50000000,
            filter_algorithm=apf);