Backport https://github.com/erlang/otp/commit/e7a1067112f47a860b6974882fdbd19e52b7c372
Index: lib/os_mon/test/cpu_sup_SUITE.erl
--- lib/os_mon/test/cpu_sup_SUITE.erl.orig
+++ lib/os_mon/test/cpu_sup_SUITE.erl
@@ -61,6 +61,8 @@ all() -> 
             [load_api, util_api, util_values, port, unavailable];
         {unix, linux} ->
             [load_api, util_api, util_values, port, unavailable];
+        {unix, openbsd} ->
+            [load_api, util_api, util_values, port, unavailable];
         {unix, freebsd} ->
             [load_api, util_api, util_values, port, unavailable];
         {unix, darwin} ->
