diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8532279..56188b9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -88,7 +88,7 @@ jobs:
       env:
         CARGO_INCREMENTAL: "0"
         RUSTC_WRAPPER: ""
-        RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Copt-level=0 -Clink-dead-code -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
+        RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Copt-level=0 -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
         RUSTDOCFLAGS: "-Cpanic=abort"
     - name: "`grcov` ~ install"
       id: build_grcov
diff --git a/Cargo.lock b/Cargo.lock
index 629738d..a79d2ac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -71,6 +71,17 @@ version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
 
+[[package]]
+name = "bstr"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "40723b8fb387abc38f4f4a37c09073622e41dd12327033091ef8950659e6dc0c"
+dependencies = [
+ "memchr",
+ "regex-automata",
+ "serde",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -85,18 +96,18 @@ checksum = "fd16c4719339c4530435d38e511904438d07cce7950afa3718a84ac36c10e89e"
 
 [[package]]
 name = "clap"
-version = "4.5.10"
+version = "4.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f6b81fb3c84f5563d509c59b5a48d935f689e993afa90fe39047f05adef9142"
+checksum = "0fbb260a053428790f3de475e304ff84cdbc4face759ea7a3e64c1edd938a7fc"
 dependencies = [
  "clap_builder",
 ]
 
 [[package]]
 name = "clap_builder"
-version = "4.5.10"
+version = "4.5.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ca6706fd5224857d9ac5eb9355f6683563cc0541c7cd9d014043b57cbec78ac"
+checksum = "64b17d7ea74e9f833c7dbf2cbe4fb12ff26783eda4782a8975b72f895c9b4d99"
 dependencies = [
  "anstream",
  "anstyle",
@@ -107,9 +118,9 @@ dependencies = [
 
 [[package]]
 name = "clap_complete"
-version = "4.5.9"
+version = "4.5.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "faa2032320fd6f50d22af510d204b2994eef49600dfbd0e771a166213844e4cd"
+checksum = "a8670053e87c316345e384ca1f3eba3006fc6355ed8b8a1140d104e109e3df34"
 dependencies = [
  "clap",
 ]
@@ -122,9 +133,9 @@ checksum = "98cc8fbded0c607b7ba9dd60cd98df59af97e84d24e49c8557331cfc26d301ce"
 
 [[package]]
 name = "clap_mangen"
-version = "0.2.22"
+version = "0.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f50dde5bc0c853d6248de457e5eb6e5a674a54b93810a34ded88d882ca1fe2de"
+checksum = "f17415fd4dfbea46e3274fcd8d368284519b358654772afb700dc2e8d2b24eeb"
 dependencies = [
  "clap",
  "roff",
@@ -632,15 +643,15 @@ dependencies = [
 
 [[package]]
 name = "sysinfo"
-version = "0.30.13"
+version = "0.31.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a5b4ddaee55fb2bea2bf0e5000747e5f5c0de765e5a5ff87f4cd106439f4bb3"
+checksum = "29a6b037e3af4ae9a9d6214198e4df53091363b2c96c88fc416a6c1bd92a2799"
 dependencies = [
- "cfg-if",
+ "bstr",
  "core-foundation-sys",
  "libc",
+ "memchr",
  "ntapi",
- "once_cell",
  "rayon",
  "windows",
 ]
@@ -767,6 +778,7 @@ dependencies = [
  "uu_ctrlaltdel",
  "uu_last",
  "uu_lscpu",
+ "uu_lsmem",
  "uu_mountpoint",
  "uu_rev",
  "uucore",
@@ -800,6 +812,14 @@ dependencies = [
  "uucore",
 ]
 
+[[package]]
+name = "uu_lsmem"
+version = "0.0.1"
+dependencies = [
+ "clap",
+ "uucore",
+]
+
 [[package]]
 name = "uu_mountpoint"
 version = "0.0.1"
@@ -891,21 +911,55 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
 name = "windows"
-version = "0.52.0"
+version = "0.57.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
+checksum = "12342cb4d8e3b046f3d80effd474a7a02447231330ef77d71daa6fbc40681143"
 dependencies = [
  "windows-core",
- "windows-targets 0.52.0",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
 name = "windows-core"
-version = "0.52.0"
+version = "0.57.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
+checksum = "d2ed2439a290666cd67ecce2b0ffaad89c2a56b976b736e6ece670297897832d"
 dependencies = [
- "windows-targets 0.52.0",
+ "windows-implement",
+ "windows-interface",
+ "windows-result",
+ "windows-targets 0.52.6",
+]
+
+[[package]]
+name = "windows-implement"
+version = "0.57.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9107ddc059d5b6fbfbffdfa7a7fe3e22a226def0b2608f72e9d552763d3e1ad7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "windows-interface"
+version = "0.57.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "29bee4b38ea3cde66011baa44dba677c432a78593e202392d1e9070cf2a7fca7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "windows-result"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e383302e8ec8515204254685643de10811af0ed97ea37210dc26fb0032647f8"
+dependencies = [
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -923,7 +977,7 @@ version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
 dependencies = [
- "windows-targets 0.52.0",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -943,17 +997,18 @@ dependencies = [
 
 [[package]]
 name = "windows-targets"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a18201040b24831fbb9e4eb208f8892e1f50a37feb53cc7ff887feb8f50e7cd"
+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
 dependencies = [
- "windows_aarch64_gnullvm 0.52.0",
- "windows_aarch64_msvc 0.52.0",
- "windows_i686_gnu 0.52.0",
- "windows_i686_msvc 0.52.0",
- "windows_x86_64_gnu 0.52.0",
- "windows_x86_64_gnullvm 0.52.0",
- "windows_x86_64_msvc 0.52.0",
+ "windows_aarch64_gnullvm 0.52.6",
+ "windows_aarch64_msvc 0.52.6",
+ "windows_i686_gnu 0.52.6",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc 0.52.6",
+ "windows_x86_64_gnu 0.52.6",
+ "windows_x86_64_gnullvm 0.52.6",
+ "windows_x86_64_msvc 0.52.6",
 ]
 
 [[package]]
@@ -964,9 +1019,9 @@ checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
 
 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb7764e35d4db8a7921e09562a0304bf2f93e0a51bfccee0bd0bb0b666b015ea"
+checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
 
 [[package]]
 name = "windows_aarch64_msvc"
@@ -976,9 +1031,9 @@ checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
 
 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbaa0368d4f1d2aaefc55b6fcfee13f41544ddf36801e793edbbfd7d7df075ef"
+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
 
 [[package]]
 name = "windows_i686_gnu"
@@ -988,9 +1043,15 @@ checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
 
 [[package]]
 name = "windows_i686_gnu"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a28637cb1fa3560a16915793afb20081aba2c92ee8af57b4d5f28e4b3e7df313"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
 
 [[package]]
 name = "windows_i686_msvc"
@@ -1000,9 +1061,9 @@ checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
 
 [[package]]
 name = "windows_i686_msvc"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ffe5e8e31046ce6230cc7215707b816e339ff4d4d67c65dffa206fd0f7aa7b9a"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
 
 [[package]]
 name = "windows_x86_64_gnu"
@@ -1012,9 +1073,9 @@ checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
 
 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d6fa32db2bc4a2f5abeacf2b69f7992cd09dca97498da74a151a3132c26befd"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
@@ -1024,9 +1085,9 @@ checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a657e1e9d3f514745a572a6846d3c7aa7dbe1658c056ed9c3344c4109a6949e"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
 
 [[package]]
 name = "windows_x86_64_msvc"
@@ -1036,9 +1097,9 @@ checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
 
 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.52.0"
+version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dff9641d1cd4be8d1a070daf9e3773c5f67e78b4d9d42263020c057706765c04"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
 
 [[package]]
 name = "xattr"
diff --git a/Cargo.toml b/Cargo.toml
index 0895d59..d165c0d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,6 +28,7 @@ uudoc = []
 feat_common_core = [
   "mountpoint",
   "lscpu",
+  "lsmem",
   "ctrlaltdel",
   "rev",
   "last"
@@ -39,7 +40,7 @@ clap = { version = "4.4", features = ["wrap_help", "cargo"] }
 clap_complete = "4.4"
 clap_mangen = "0.2"
 regex = "1.10.2"
-sysinfo = "0.30"
+sysinfo = "0.31"
 libc = "0.2.152"
 phf = "0.11.2"
 phf_codegen = "0.11.2"
@@ -60,6 +61,7 @@ dns-lookup = { workspace = true }
 
 #
 lscpu = { optional = true, version = "0.0.1", package = "uu_lscpu", path = "src/uu/lscpu" }
+lsmem = { optional = true, version = "0.0.1", package = "uu_lsmem", path = "src/uu/lsmem" }
 mountpoint = { optional = true, version = "0.0.1", package = "uu_mountpoint", path = "src/uu/mountpoint" }
 ctrlaltdel = { optional = true, version = "0.0.1", package = "uu_ctrlaltdel", path = "src/uu/ctrlaltdel" }
 rev = { optional = true, version = "0.0.1", package = "uu_rev", path = "src/uu/rev" }
diff --git a/src/uu/lscpu/Cargo.toml b/src/uu/lscpu/Cargo.toml
index c59e07e..60b38f1 100644
--- a/src/uu/lscpu/Cargo.toml
+++ b/src/uu/lscpu/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2021"
 path = "src/lscpu.rs"
 
 [[bin]]
-name = "mountpoint"
+name = "lscpu"
 path = "src/main.rs"
 
 [dependencies]
diff --git a/src/uu/lscpu/src/lscpu.rs b/src/uu/lscpu/src/lscpu.rs
index 2faacf9..001ae36 100644
--- a/src/uu/lscpu/src/lscpu.rs
+++ b/src/uu/lscpu/src/lscpu.rs
@@ -16,7 +16,6 @@ const USAGE: &str = help_usage!("lscpu.md");
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let _matches: clap::ArgMatches = uu_app().try_get_matches_from(args)?;
     let system = System::new_all();
-    let _cpu = system.global_cpu_info();
 
     println!("Architecture: {}", get_architecture());
     println!("CPU(s): {}", system.cpus().len());
diff --git a/src/uu/lsmem/Cargo.toml b/src/uu/lsmem/Cargo.toml
new file mode 100644
index 0000000..a76660a
--- /dev/null
+++ b/src/uu/lsmem/Cargo.toml
@@ -0,0 +1,15 @@
+[package]
+name = "uu_lsmem"
+version = "0.0.1"
+edition = "2021"
+
+[lib]
+path = "src/lsmem.rs"
+
+[[bin]]
+name = "lsmem"
+path = "src/main.rs"
+
+[dependencies]
+uucore = { workspace = true }
+clap = { workspace = true }
diff --git a/src/uu/lsmem/lsmem.md b/src/uu/lsmem/lsmem.md
new file mode 100644
index 0000000..7903bbd
--- /dev/null
+++ b/src/uu/lsmem/lsmem.md
@@ -0,0 +1,7 @@
+# lsmem
+
+```
+lsmem [OPTION]...
+```
+
+List the ranges of available memory with their online status.
diff --git a/src/uu/lsmem/src/lsmem.rs b/src/uu/lsmem/src/lsmem.rs
new file mode 100644
index 0000000..d8f3388
--- /dev/null
+++ b/src/uu/lsmem/src/lsmem.rs
@@ -0,0 +1,24 @@
+// This file is part of the uutils util-linux package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
+
+use clap::{crate_version, Command};
+use uucore::{error::UResult, format_usage, help_about, help_usage};
+
+const ABOUT: &str = help_about!("lsmem.md");
+const USAGE: &str = help_usage!("lsmem.md");
+
+#[uucore::main]
+pub fn uumain(args: impl uucore::Args) -> UResult<()> {
+    let _matches: clap::ArgMatches = uu_app().try_get_matches_from(args)?;
+    Ok(())
+}
+
+pub fn uu_app() -> Command {
+    Command::new(uucore::util_name())
+        .version(crate_version!())
+        .about(ABOUT)
+        .override_usage(format_usage(USAGE))
+        .infer_long_args(true)
+}
diff --git a/src/uu/lsmem/src/main.rs b/src/uu/lsmem/src/main.rs
new file mode 100644
index 0000000..33561cd
--- /dev/null
+++ b/src/uu/lsmem/src/main.rs
@@ -0,0 +1 @@
+uucore::bin!(uu_lsmem);
diff --git a/src/uu/rev/src/rev.rs b/src/uu/rev/src/rev.rs
index 75e56fe..b980d16 100644
--- a/src/uu/rev/src/rev.rs
+++ b/src/uu/rev/src/rev.rs
@@ -12,53 +12,55 @@ use uucore::{error::UResult, format_usage, help_about, help_usage};
 const ABOUT: &str = help_about!("rev.md");
 const USAGE: &str = help_usage!("rev.md");
 
+mod options {
+    pub const FILE: &str = "file";
+    pub const ZERO: &str = "zero";
+}
+
 #[uucore::main]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let matches: clap::ArgMatches = uu_app().try_get_matches_from(args)?;
-    let files = matches.get_many::<String>("file");
+    let files = matches.get_many::<String>(options::FILE);
+    let zero = matches.get_flag(options::ZERO);
+
+    let sep = if zero { b'\0' } else { b'\n' };
 
-    match files {
-        Some(files) => {
-            for path in files {
-                let file = match std::fs::File::open(path) {
-                    Ok(val) => val,
-                    Err(err) => {
-                        uucore::error::set_exit_code(1);
-                        uucore::show_error!("cannot open {}: {}", path, err);
-                        continue;
-                    }
-                };
-                if let Err(err) = rev_stream(file) {
-                    uucore::error::set_exit_code(1);
-                    uucore::show_error!("cannot read {}: {}", path, err);
-                }
+    if let Some(files) = files {
+        for path in files {
+            let Ok(file) = std::fs::File::open(path) else {
+                uucore::error::set_exit_code(1);
+                uucore::show_error!("cannot open {path}: No such file or directory");
+                continue;
+            };
+            if let Err(err) = rev_stream(file, sep) {
+                uucore::error::set_exit_code(1);
+                uucore::show_error!("cannot read {path}: {err}");
             }
         }
-        None => {
-            let stdin = std::io::stdin().lock();
-            let _ = rev_stream(stdin);
-        }
+    } else {
+        let stdin = std::io::stdin().lock();
+        let _ = rev_stream(stdin, sep);
     }
 
     Ok(())
 }
 
-fn rev_stream(stream: impl Read) -> std::io::Result<()> {
+fn rev_stream(stream: impl Read, sep: u8) -> std::io::Result<()> {
     let mut stdout = std::io::stdout().lock();
     let mut stream = BufReader::new(stream);
     let mut buf = Vec::with_capacity(4096);
     loop {
         buf.clear();
-        stream.read_until(b'\n', &mut buf)?;
-        if buf.last().copied() != Some(b'\n') {
+        stream.read_until(sep, &mut buf)?;
+        if buf.last().copied() == Some(sep) {
+            buf.pop();
             buf.reverse();
+            buf.push(sep);
             stdout.write_all(&buf)?;
-            break;
         } else {
-            buf.pop();
             buf.reverse();
-            buf.push(b'\n');
             stdout.write_all(&buf)?;
+            break;
         }
     }
     Ok(())
@@ -71,11 +73,18 @@ pub fn uu_app() -> Command {
         .override_usage(format_usage(USAGE))
         .infer_long_args(true)
         .arg(
-            Arg::new("file")
+            Arg::new(options::FILE)
                 .value_name("FILE")
                 .help("Paths of files to reverse")
                 .index(1)
                 .action(ArgAction::Set)
                 .num_args(1..),
         )
+        .arg(
+            Arg::new(options::ZERO)
+                .short('0')
+                .long("zero")
+                .help("Zero termination. Use the byte '\\0' as line separator.")
+                .action(ArgAction::SetTrue),
+        )
 }
diff --git a/tests/by-util/test_lsmem.rs b/tests/by-util/test_lsmem.rs
new file mode 100644
index 0000000..33c603c
--- /dev/null
+++ b/tests/by-util/test_lsmem.rs
@@ -0,0 +1,4 @@
+// This file is part of the uutils util-linux package.
+//
+// For the full copyright and license information, please view the LICENSE
+// file that was distributed with this source code.
diff --git a/tests/by-util/test_rev.rs b/tests/by-util/test_rev.rs
index ac8f594..6fe7335 100644
--- a/tests/by-util/test_rev.rs
+++ b/tests/by-util/test_rev.rs
@@ -9,3 +9,74 @@ use crate::common::util::TestScenario;
 fn test_invalid_arg() {
     new_ucmd!().arg("--definitely-invalid").fails().code_is(1);
 }
+
+#[test]
+fn test_piped_in_data() {
+    new_ucmd!().pipe_in("a test").succeeds().stdout_is("tset a");
+}
+
+#[test]
+fn test_existing_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    at.write("a.txt", "line A\nline B");
+
+    ucmd.arg("a.txt").succeeds().stdout_is("A enil\nB enil");
+}
+
+#[test]
+fn test_zero() {
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    at.write("a.txt", "line A\0line B");
+
+    ucmd.arg("a.txt")
+        .arg("--zero")
+        .succeeds()
+        .stdout_is("A enil\0B enil");
+}
+
+#[test]
+fn test_multiple_files() {
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    at.write("a.txt", "file A\n");
+    at.write("b.txt", "file B\n");
+
+    ucmd.args(&["a.txt", "b.txt"])
+        .succeeds()
+        .stdout_is("A elif\nB elif\n");
+}
+
+#[test]
+fn test_empty_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    at.touch("empty.txt");
+
+    ucmd.arg("empty.txt").succeeds().no_output();
+}
+
+#[test]
+fn test_non_existing_file() {
+    new_ucmd!()
+        .arg("non_existing_file")
+        .fails()
+        .code_is(1)
+        .no_stdout()
+        .stderr_contains("cannot open non_existing_file: No such file or directory");
+}
+
+#[test]
+fn test_non_existing_and_existing_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+
+    at.write("a.txt", "file A");
+
+    ucmd.arg("non_existing_file")
+        .arg("a.txt")
+        .fails()
+        .code_is(1)
+        .stderr_contains("cannot open non_existing_file: No such file or directory")
+        .stdout_is("A elif");
+}