@@ -491,12 +491,12 @@ func (s *DockerSuite) TestExecOnReadonlyContainer(c *check.C) {

 func (s *DockerSuite) TestExecUlimits(c *check.C) {

 	testRequires(c, DaemonIsLinux)

 	name := "testexeculimits"

-	runSleepingContainer(c, "-d", "--ulimit", "nproc=21", "--name", name)

+	runSleepingContainer(c, "-d", "--ulimit", "nofile=511:511", "--name", name)

 	c.Assert(waitRun(name), checker.IsNil)

-	out, _, err := dockerCmdWithError("exec", name, "sh", "-c", "ulimit -p")

+	out, _, err := dockerCmdWithError("exec", name, "sh", "-c", "ulimit -n")

 	c.Assert(err, checker.IsNil)

-	c.Assert(strings.TrimSpace(out), checker.Equals, "21")

+	c.Assert(strings.TrimSpace(out), checker.Equals, "511")

 }

 // #15750