diff --git a/gnu/packages/benchmark.scm b/gnu/packages/benchmark.scm
index d204803f97..8743dc66aa 100644
--- a/gnu/packages/benchmark.scm
+++ b/gnu/packages/benchmark.scm
@@ -472,6 +472,12 @@ (define-public python-locust
                      ;; https://github.com/locustio/locust/issues/1708).
                      "not test_custom_exit_code"
                      "not test_webserver"
+                     ;; These fail on the build farm for unknown reasons.  I
+                     ;; suspect the test suite is just really picky and
+                     ;; stateful.
+                     "not test_workers_shut_down_if_master_is_gone"
+                     "not test_custom_arguments_in_file"
+                     "not test_custom_arguments"
                      ;; These are time critical and can fail on busy machines.
                      "not test_distribute_users"
                      "not test_ramp_down_from_100_000_to_0_users_with_50_user_classes_and_1000_workers_and_5000_spawn_rate"