1 files changed, 6 insertions, 0 deletions
diff --git a/test/syscalls/linux/rlimits.cc b/test/syscalls/linux/rlimits.cc
index 5a6174d99..7b255d0f6 100644
--- a/test/syscalls/linux/rlimits.cc
+++ b/test/syscalls/linux/rlimits.cc
@@ -29,6 +29,12 @@ TEST(RlimitTest, SetRlimitHigher) {
   struct rlimit rl = {};
   EXPECT_THAT(getrlimit(RLIMIT_NOFILE, &rl), SyscallSucceeds());
 
+  // Lower the rlimit first, as it may be equal to /proc/sys/fs/nr_open, in
+  // which case even users with CAP_SYS_RESOURCE can't raise it.
+  rl.rlim_cur--;
+  rl.rlim_max--;
+  ASSERT_THAT(setrlimit(RLIMIT_NOFILE, &rl), SyscallSucceeds());
+
   rl.rlim_max++;
   EXPECT_THAT(setrlimit(RLIMIT_NOFILE, &rl), SyscallSucceeds());
 }