diff --git a/src/uu/mknod/Cargo.toml b/src/uu/mknod/Cargo.toml
index 95d890d6e..deffa1af6 100644
--- a/src/uu/mknod/Cargo.toml
+++ b/src/uu/mknod/Cargo.toml
@@ -16,7 +16,7 @@ name = "uu_mknod"
 path = "src/mknod.rs"
 
 [dependencies]
-clap = { version = "2.33", features = ["wrap_help"] }
+clap = { version = "3.0", features = ["wrap_help", "cargo"] }
 libc = "^0.2.42"
 uucore = { version=">=0.0.10", package="uucore", path="../../uucore", features=["mode"] }
 uucore_procs = { version=">=0.0.7", package="uucore_procs", path="../../uucore_procs" }
diff --git a/src/uu/mknod/src/mknod.rs b/src/uu/mknod/src/mknod.rs
index b93716a63..bee4bade2 100644
--- a/src/uu/mknod/src/mknod.rs
+++ b/src/uu/mknod/src/mknod.rs
@@ -143,28 +143,28 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     }
 }
 
-pub fn uu_app() -> App<'static, 'static> {
+pub fn uu_app<'a>() -> App<'a> {
     App::new(uucore::util_name())
         .version(crate_version!())
-        .usage(USAGE)
+        .override_usage(USAGE)
         .after_help(LONG_HELP)
         .about(ABOUT)
         .arg(
-            Arg::with_name("mode")
-                .short("m")
+            Arg::new("mode")
+                .short('m')
                 .long("mode")
                 .value_name("MODE")
                 .help("set file permission bits to MODE, not a=rw - umask"),
         )
         .arg(
-            Arg::with_name("name")
+            Arg::new("name")
                 .value_name("NAME")
                 .help("name of the new file")
                 .required(true)
                 .index(1),
         )
         .arg(
-            Arg::with_name("type")
+            Arg::new("type")
                 .value_name("TYPE")
                 .help("type of the new file (b, c, u or p)")
                 .required(true)
@@ -172,14 +172,14 @@ pub fn uu_app() -> App<'static, 'static> {
                 .index(2),
         )
         .arg(
-            Arg::with_name("major")
+            Arg::new("major")
                 .value_name("MAJOR")
                 .help("major file type")
                 .validator(valid_u64)
                 .index(3),
         )
         .arg(
-            Arg::with_name("minor")
+            Arg::new("minor")
                 .value_name("MINOR")
                 .help("minor file type")
                 .validator(valid_u64)
@@ -202,7 +202,7 @@ fn get_mode(matches: &ArgMatches) -> Result<mode_t, String> {
     }
 }
 
-fn valid_type(tpe: String) -> Result<(), String> {
+fn valid_type(tpe: &str) -> Result<(), String> {
     // Only check the first character, to allow mnemonic usage like
     // 'mknod /dev/rst0 character 18 0'.
     tpe.chars()
@@ -217,6 +217,6 @@ fn valid_type(tpe: String) -> Result<(), String> {
         })
 }
 
-fn valid_u64(num: String) -> Result<(), String> {
-    num.parse::<u64>().map(|_| ()).map_err(|_| num)
+fn valid_u64(num: &str) -> Result<(), String> {
+    num.parse::<u64>().map(|_| ()).map_err(|_| num.into())
 }
diff --git a/tests/by-util/test_mknod.rs b/tests/by-util/test_mknod.rs
index 1d39372ac..f42ab0b90 100644
--- a/tests/by-util/test_mknod.rs
+++ b/tests/by-util/test_mknod.rs
@@ -86,7 +86,6 @@ fn test_mknod_character_device_requires_major_and_minor() {
         .arg("1")
         .arg("c")
         .fails()
-        .status_code(1)
         .stderr_contains(&"Invalid value for '<MINOR>'");
     new_ucmd!()
         .arg("test_file")
@@ -94,7 +93,6 @@ fn test_mknod_character_device_requires_major_and_minor() {
         .arg("c")
         .arg("1")
         .fails()
-        .status_code(1)
         .stderr_contains(&"Invalid value for '<MAJOR>'");
 }
 
@@ -104,7 +102,6 @@ fn test_mknod_invalid_arg() {
     new_ucmd!()
         .arg("--foo")
         .fails()
-        .status_code(1)
         .no_stdout()
         .stderr_contains(&"Found argument '--foo' which wasn't expected");
 }