diff --git a/auto/unix b/auto/unix
index 18256007..59c7f68a 100644
--- a/auto/unix
+++ b/auto/unix
@@ -3,22 +3,6 @@
 # Copyright (C) NGINX, Inc.
 
 
-nxt_feature="arc4random()"
-nxt_feature_name=NXT_HAVE_ARC4RANDOM
-nxt_feature_run=
-nxt_feature_incs=
-nxt_feature_libs=
-nxt_feature_test="#include <stdlib.h>
-
-                  int main() {
-
-                      (void) arc4random();
-
-                      return 0;
-                  }"
-. auto/feature
-
-
 # Linux 3.17 getrandom().
 
 nxt_feature="getrandom()"
diff --git a/test/nxt_lib_unit_test.c b/test/nxt_lib_unit_test.c
index 50615828..bac2258e 100644
--- a/test/nxt_lib_unit_test.c
+++ b/test/nxt_lib_unit_test.c
@@ -69,11 +69,9 @@ main(int argc, char **argv)
 
 #endif
 
-#if !(NXT_HAVE_ARC4RANDOM)
     if (nxt_random_unit_test(thr) != NXT_OK) {
         return 1;
     }
-#endif
 
     if (nxt_term_parse_unit_test(thr) != NXT_OK) {
         return 1;