diff --git a/.github/workflows/CICD.yml b/.github/workflows/CICD.yml
index 32fd30536..849fb3c67 100644
--- a/.github/workflows/CICD.yml
+++ b/.github/workflows/CICD.yml
@@ -331,7 +331,7 @@ jobs:
       shell: bash
       run: |
         RUSTDOCFLAGS="-Dwarnings" cargo doc  ${{ steps.vars.outputs.CARGO_FEATURES_OPTION }} --no-deps --workspace --document-private-items
-    - uses: DavidAnson/markdownlint-cli2-action@v9
+    - uses: DavidAnson/markdownlint-cli2-action@v10
       with:
         command: fix
         globs: |
@@ -601,6 +601,44 @@ jobs:
               --arg size "$SIZE" \
               --arg multisize "$SIZE_MULTI" \
               '{($date): { sha: $sha, size: $size, multisize: $multisize, }}' > size-result.json
+    - name: Download the previous individual size result
+      uses: dawidd6/action-download-artifact@v2
+      with:
+        workflow: CICD.yml
+        name: individual-size-result
+        repo: uutils/coreutils
+        path: dl
+    - name: Download the previous size result
+      uses: dawidd6/action-download-artifact@v2
+      with:
+        workflow: CICD.yml
+        name: size-result
+        repo: uutils/coreutils
+        path: dl
+    - name: Check uutil release sizes
+      shell: bash
+      run: |
+        check() {
+          # Warn if the size increases by more than 5%
+          threshold='1.05'
+          ratio=$(jq -n "$2 / $3")
+          echo "$1: size=$2, previous_size=$3, ratio=$ratio, threshold=$threshold"
+          if [[ "$(jq -n "$ratio > $threshold")" == 'true' ]]; then
+            echo "::warning file=$4::Size of $1 increases by more than 5%"
+          fi
+        }
+        ## Check individual size result
+        while read -r name previous_size; do
+          size=$(cat individual-size-result.json | jq -r ".[] | .sizes | .\"$name\"")
+          check "\`$name\` binary" "$size" "$previous_size" 'individual-size-result.json'
+        done < <(cat dl/individual-size-result.json | jq -r '.[] | .sizes | to_entries[] | "\(.key) \(.value)"')
+        ## Check size result
+        size=$(cat size-result.json | jq -r '.[] | .size')
+        previous_size=$(cat dl/size-result.json | jq -r '.[] | .size')
+        check 'multiple binaries' "$size" "$previous_size" 'size-result.json'
+        multisize=$(cat size-result.json | jq -r '.[] | .multisize')
+        previous_multisize=$(cat dl/size-result.json | jq -r '.[] | .multisize')
+        check 'multicall binary' "$multisize" "$previous_multisize" 'size-result.json'
     - name: Upload the individual size result
       uses: actions/upload-artifact@v3
       with:
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8f66b2bba..7dc2565c1 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -217,6 +217,8 @@ To run uutils against the GNU test suite locally, run the following commands:
 
 ```shell
 bash util/build-gnu.sh
+# Build uutils without release optimizations
+UU_MAKE_PROFILE=debug bash util/build-gnu.sh
 bash util/run-gnu-test.sh
 # To run a single test:
 bash util/run-gnu-test.sh tests/touch/not-owner.sh # for example
diff --git a/Cargo.lock b/Cargo.lock
index 90af50e20..a74acc33a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2538,7 +2538,9 @@ version = "0.0.18"
 dependencies = [
  "chrono",
  "clap",
+ "humantime_to_duration",
  "libc",
+ "time",
  "uucore",
  "windows-sys 0.45.0",
 ]
diff --git a/src/bin/coreutils.rs b/src/bin/coreutils.rs
index ac9750f93..cc18d3ee2 100644
--- a/src/bin/coreutils.rs
+++ b/src/bin/coreutils.rs
@@ -43,8 +43,8 @@ fn binary_path(args: &mut impl Iterator<Item = OsString>) -> PathBuf {
     }
 }
 
-fn name(binary_path: &Path) -> &str {
-    binary_path.file_stem().unwrap().to_str().unwrap()
+fn name(binary_path: &Path) -> Option<&str> {
+    binary_path.file_stem()?.to_str()
 }
 
 fn main() {
@@ -54,7 +54,10 @@ fn main() {
     let mut args = uucore::args_os();
 
     let binary = binary_path(&mut args);
-    let binary_as_util = name(&binary);
+    let binary_as_util = name(&binary).unwrap_or_else(|| {
+        usage(&utils, "<unknown binary name>");
+        process::exit(0);
+    });
 
     // binary name equals util name?
     if let Some(&(uumain, _)) = utils.get(binary_as_util) {
diff --git a/src/uu/date/Cargo.toml b/src/uu/date/Cargo.toml
index fab98f20d..923ca4aa7 100644
--- a/src/uu/date/Cargo.toml
+++ b/src/uu/date/Cargo.toml
@@ -1,3 +1,4 @@
+# spell-checker:ignore humantime
 [package]
 name = "uu_date"
 version = "0.0.18"
@@ -16,8 +17,11 @@ path = "src/date.rs"
 
 [dependencies]
 chrono = { workspace=true }
+#/ TODO: check if we can avoid chrono+time
+time = { workspace=true }
 clap = { workspace=true }
 uucore = { workspace=true }
+humantime_to_duration = { workspace=true }
 
 [target.'cfg(unix)'.dependencies]
 libc = { workspace=true }
diff --git a/src/uu/date/date-usage.md b/src/uu/date/date-usage.md
new file mode 100644
index 000000000..bf2dc469d
--- /dev/null
+++ b/src/uu/date/date-usage.md
@@ -0,0 +1,87 @@
+# `date` usage
+
+<!-- spell-checker:ignore (format) hhmm -->
+
+FORMAT controls the output.  Interpreted sequences are:
+
+| Sequence | Description                                                          | Example                |
+| -------- | -------------------------------------------------------------------- | ---------------------- |
+| %%       | a literal %                                                          | %                      |
+| %a       | locale's abbreviated weekday name                                    | Sun                    |
+| %A       | locale's full weekday name                                           | Sunday                 |
+| %b       | locale's abbreviated month name                                      | Jan                    |
+| %B       | locale's full month name                                             | January                |
+| %c       | locale's date and time                                               | Thu Mar 3 23:05:25 2005|
+| %C       | century; like %Y, except omit last two digits                        | 20                     |
+| %d       | day of month                                                         | 01                     |
+| %D       | date; same as %m/%d/%y                                               | 12/31/99               |
+| %e       | day of month, space padded; same as %_d                              | 3                      |
+| %F       | full date; same as %Y-%m-%d                                          | 2005-03-03             |
+| %g       | last two digits of year of ISO week number (see %G)                  | 05                     |
+| %G       | year of ISO week number (see %V); normally useful only with %V       | 2005                   |
+| %h       | same as %b                                                           | Jan                    |
+| %H       | hour (00..23)                                                        | 23                     |
+| %I       | hour (01..12)                                                        | 11                     |
+| %j       | day of year (001..366)                                               | 062                    |
+| %k       | hour, space padded ( 0..23); same as %_H                             |  3                     |
+| %l       | hour, space padded ( 1..12); same as %_I                             |  9                     |
+| %m       | month (01..12)                                                       | 03                     |
+| %M       | minute (00..59)                                                      | 30                     |
+| %n       | a newline                                                            | \n                     |
+| %N       | nanoseconds (000000000..999999999)                                   | 123456789              |
+| %p       | locale's equivalent of either AM or PM; blank if not known           | PM                     |
+| %P       | like %p, but lower case                                              | pm                     |
+| %q       | quarter of year (1..4)                                               | 1                      |
+| %r       | locale's 12-hour clock time                                          | 11:11:04 PM            |
+| %R       | 24-hour hour and minute; same as %H:%M                               | 23:30                  |
+| %s       | seconds since 1970-01-01 00:00:00 UTC                                | 1615432800             |
+| %S       | second (00..60)                                                      | 30                     |
+| %t       | a tab                                                                | \t                     |
+| %T       | time; same as %H:%M:%S                                               | 23:30:30               |
+| %u       | day of week (1..7); 1 is Monday                                      | 4                      |
+| %U       | week number of year, with Sunday as first day of week (00..53)       | 10                     |
+| %V       | ISO week number, with Monday as first day of week (01..53)           | 12                     |
+| %w       | day of week (0..6); 0 is Sunday                                      | 4                      |
+| %W       | week number of year, with Monday as first day of week (00..53)       | 11                     |
+| %x       | locale's date representation                                         | 03/03/2005             |
+| %X       | locale's time representation                                         | 23:30:30               |
+| %y       | last two digits of year (00..99)                                     | 05                     |
+| %Y       | year                                                                 | 2005                   |
+| %z       | +hhmm numeric time zone                                              | -0400                  |
+| %:z      | +hh:mm numeric time zone                                             | -04:00                 |
+| %::z     | +hh:mm:ss numeric time zone                                          | -04:00:00              |
+| %:::z    | numeric time zone with : to necessary precision                      | -04, +05:30            |
+| %Z       | alphabetic time zone abbreviation                                    | EDT                    |
+
+By default, date pads numeric fields with zeroes.
+The following optional flags may follow '%':
+
+* `-` (hyphen) do not pad the field
+* `_` (underscore) pad with spaces
+* `0` (zero) pad with zeros
+* `^` use upper case if possible
+* `#` use opposite case if possible
+
+After any flags comes an optional field width, as a decimal number;
+then an optional modifier, which is either
+E to use the locale's alternate representations if available, or
+O to use the locale's alternate numeric symbols if available.
+
+Examples:
+Convert seconds since the epoch (1970-01-01 UTC) to a date
+
+```
+date --date='@2147483647'
+```
+
+Show the time on the west coast of the US (use tzselect(1) to find TZ)
+
+```
+TZ='America/Los_Angeles' date
+```
+
+Show the local time for 9AM next Friday on the west coast of the US
+
+```
+date --date='TZ="America/Los_Angeles" 09:00 next Fri'
+```
diff --git a/src/uu/date/date-usage.mkd b/src/uu/date/date-usage.mkd
deleted file mode 100644
index 829001095..000000000
--- a/src/uu/date/date-usage.mkd
+++ /dev/null
@@ -1,78 +0,0 @@
-# `date` usage
-
-<!-- spell-checker:ignore (format) hhmm -->
-
-``` text
-FORMAT controls the output.  Interpreted sequences are:
-
-  %%   a literal %
-  %a   locale's abbreviated weekday name (e.g., Sun)
-  %A   locale's full weekday name (e.g., Sunday)
-  %b   locale's abbreviated month name (e.g., Jan)
-  %B   locale's full month name (e.g., January)
-  %c   locale's date and time (e.g., Thu Mar  3 23:05:25 2005)
-  %C   century; like %Y, except omit last two digits (e.g., 20)
-  %d   day of month (e.g., 01)
-  %D   date; same as %m/%d/%y
-  %e   day of month, space padded; same as %_d
-  %F   full date; same as %Y-%m-%d
-  %g   last two digits of year of ISO week number (see %G)
-  %G   year of ISO week number (see %V); normally useful only with %V
-  %h   same as %b
-  %H   hour (00..23)
-  %I   hour (01..12)
-  %j   day of year (001..366)
-  %k   hour, space padded ( 0..23); same as %_H
-  %l   hour, space padded ( 1..12); same as %_I
-  %m   month (01..12)
-  %M   minute (00..59)
-  %n   a newline
-  %N   nanoseconds (000000000..999999999)
-  %p   locale's equivalent of either AM or PM; blank if not known
-  %P   like %p, but lower case
-  %q   quarter of year (1..4)
-  %r   locale's 12-hour clock time (e.g., 11:11:04 PM)
-  %R   24-hour hour and minute; same as %H:%M
-  %s   seconds since 1970-01-01 00:00:00 UTC
-  %S   second (00..60)
-  %t   a tab
-  %T   time; same as %H:%M:%S
-  %u   day of week (1..7); 1 is Monday
-  %U   week number of year, with Sunday as first day of week (00..53)
-  %V   ISO week number, with Monday as first day of week (01..53)
-  %w   day of week (0..6); 0 is Sunday
-  %W   week number of year, with Monday as first day of week (00..53)
-  %x   locale's date representation (e.g., 12/31/99)
-  %X   locale's time representation (e.g., 23:13:48)
-  %y   last two digits of year (00..99)
-  %Y   year
-  %z   +hhmm numeric time zone (e.g., -0400)
-  %:z  +hh:mm numeric time zone (e.g., -04:00)
-  %::z  +hh:mm:ss numeric time zone (e.g., -04:00:00)
-  %:::z  numeric time zone with : to necessary precision (e.g., -04, +05:30)
-  %Z   alphabetic time zone abbreviation (e.g., EDT)
-
-By default, date pads numeric fields with zeroes.
-The following optional flags may follow '%':
-
-  -  (hyphen) do not pad the field
-  _  (underscore) pad with spaces
-  0  (zero) pad with zeros
-  ^  use upper case if possible
-  #  use opposite case if possible
-
-After any flags comes an optional field width, as a decimal number;
-then an optional modifier, which is either
-E to use the locale's alternate representations if available, or
-O to use the locale's alternate numeric symbols if available.
-
-Examples:
-Convert seconds since the epoch (1970-01-01 UTC) to a date
-  $ date --date='@2147483647'
-
-Show the time on the west coast of the US (use tzselect(1) to find TZ)
-  $ TZ='America/Los_Angeles' date
-
-Show the local time for 9AM next Friday on the west coast of the US
-  $ date --date='TZ="America/Los_Angeles" 09:00 next Fri'
-```
diff --git a/src/uu/date/src/date.rs b/src/uu/date/src/date.rs
index ab874cb32..8b4338620 100644
--- a/src/uu/date/src/date.rs
+++ b/src/uu/date/src/date.rs
@@ -6,10 +6,10 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-// spell-checker:ignore (chrono) Datelike Timelike ; (format) DATEFILE MMDDhhmm ; (vars) datetime datetimes
+// spell-checker:ignore (chrono) Datelike Timelike ; (format) DATEFILE MMDDhhmm ; (vars) datetime datetimes humantime
 
 use chrono::format::{Item, StrftimeItems};
-use chrono::{DateTime, FixedOffset, Local, Offset, Utc};
+use chrono::{DateTime, Duration as ChronoDuration, FixedOffset, Local, Offset, Utc};
 #[cfg(windows)]
 use chrono::{Datelike, Timelike};
 use clap::{crate_version, Arg, ArgAction, Command};
@@ -18,6 +18,7 @@ use libc::{clock_settime, timespec, CLOCK_REALTIME};
 use std::fs::File;
 use std::io::{BufRead, BufReader};
 use std::path::PathBuf;
+use time::Duration;
 use uucore::display::Quotable;
 #[cfg(not(any(target_os = "redox")))]
 use uucore::error::FromIo;
@@ -96,6 +97,7 @@ enum DateSource {
     Now,
     Custom(String),
     File(PathBuf),
+    Human(Duration),
 }
 
 enum Iso8601Format {
@@ -168,7 +170,11 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     };
 
     let date_source = if let Some(date) = matches.get_one::<String>(OPT_DATE) {
-        DateSource::Custom(date.into())
+        if let Ok(duration) = humantime_to_duration::from_str(date.as_str()) {
+            DateSource::Human(duration)
+        } else {
+            DateSource::Custom(date.into())
+        }
     } else if let Some(file) = matches.get_one::<String>(OPT_FILE) {
         DateSource::File(file.into())
     } else {
@@ -219,6 +225,15 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
                 let iter = std::iter::once(date);
                 Box::new(iter)
             }
+            DateSource::Human(ref input) => {
+                // Get the current DateTime<FixedOffset> and convert the input time::Duration to chrono::Duration
+                // for things like "1 year ago"
+                let current_time = DateTime::<FixedOffset>::from(Local::now());
+                let input_chrono = ChronoDuration::seconds(input.as_seconds_f32() as i64)
+                    + ChronoDuration::nanoseconds(input.subsec_nanoseconds() as i64);
+                let iter = std::iter::once(Ok(current_time + input_chrono));
+                Box::new(iter)
+            }
             DateSource::File(ref path) => {
                 if path.is_dir() {
                     return Err(USimpleError::new(
diff --git a/src/uu/mktemp/src/mktemp.rs b/src/uu/mktemp/src/mktemp.rs
index 4a77da4c4..6a3f6f21b 100644
--- a/src/uu/mktemp/src/mktemp.rs
+++ b/src/uu/mktemp/src/mktemp.rs
@@ -281,7 +281,7 @@ impl Params {
             .join(prefix_from_template)
             .display()
             .to_string();
-        if options.treat_as_template && prefix.contains(MAIN_SEPARATOR) {
+        if options.treat_as_template && prefix_from_template.contains(MAIN_SEPARATOR) {
             return Err(MkTempError::PrefixContainsDirSeparator(options.template));
         }
         if tmpdir.is_some() && Path::new(prefix_from_template).is_absolute() {
diff --git a/src/uu/mv/src/error.rs b/src/uu/mv/src/error.rs
index 103c1116a..7810c3a95 100644
--- a/src/uu/mv/src/error.rs
+++ b/src/uu/mv/src/error.rs
@@ -15,6 +15,7 @@ pub enum MvError {
     DirectoryToNonDirectory(String),
     NonDirectoryToDirectory(String, String),
     NotADirectory(String),
+    TargetNotADirectory(String),
 }
 
 impl Error for MvError {}
@@ -34,7 +35,8 @@ impl Display for MvError {
             Self::NonDirectoryToDirectory(s, t) => {
                 write!(f, "cannot overwrite non-directory {t} with directory {s}")
             }
-            Self::NotADirectory(t) => write!(f, "target {t} is not a directory"),
+            Self::NotADirectory(t) => write!(f, "target {t}: Not a directory"),
+            Self::TargetNotADirectory(t) => write!(f, "target directory {t}: Not a directory"),
         }
     }
 }
diff --git a/src/uu/mv/src/mv.rs b/src/uu/mv/src/mv.rs
index db2b4153b..1a7897a91 100644
--- a/src/uu/mv/src/mv.rs
+++ b/src/uu/mv/src/mv.rs
@@ -108,14 +108,22 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 
     let backup_suffix = backup_control::determine_backup_suffix(&matches);
 
+    let target_dir = matches
+        .get_one::<OsString>(OPT_TARGET_DIRECTORY)
+        .map(OsString::from);
+
+    if let Some(ref maybe_dir) = target_dir {
+        if !Path::new(&maybe_dir).is_dir() {
+            return Err(MvError::TargetNotADirectory(maybe_dir.quote().to_string()).into());
+        }
+    }
+
     let behavior = Behavior {
         overwrite: overwrite_mode,
         backup: backup_mode,
         suffix: backup_suffix,
         update: update_mode,
-        target_dir: matches
-            .get_one::<OsString>(OPT_TARGET_DIRECTORY)
-            .map(OsString::from),
+        target_dir,
         no_target_dir: matches.get_flag(OPT_NO_TARGET_DIRECTORY),
         verbose: matches.get_flag(OPT_VERBOSE),
         strip_slashes: matches.get_flag(OPT_STRIP_TRAILING_SLASHES),
@@ -426,7 +434,12 @@ fn rename(
         }
 
         match b.overwrite {
-            OverwriteMode::NoClobber => return Ok(()),
+            OverwriteMode::NoClobber => {
+                return Err(io::Error::new(
+                    io::ErrorKind::Other,
+                    format!("not replacing {}", to.quote()),
+                ));
+            }
             OverwriteMode::Interactive => {
                 if !prompt_yes!("overwrite {}?", to.quote()) {
                     return Err(io::Error::new(io::ErrorKind::Other, ""));
@@ -458,12 +471,12 @@ fn rename(
     if b.verbose {
         let message = match backup_path {
             Some(path) => format!(
-                "{} -> {} (backup: {})",
+                "renamed {} -> {} (backup: {})",
                 from.quote(),
                 to.quote(),
                 path.quote()
             ),
-            None => format!("{} -> {}", from.quote(), to.quote()),
+            None => format!("renamed {} -> {}", from.quote(), to.quote()),
         };
 
         match multi_progress {
diff --git a/src/uu/paste/src/paste.rs b/src/uu/paste/src/paste.rs
index d7a4d325c..c8d807635 100644
--- a/src/uu/paste/src/paste.rs
+++ b/src/uu/paste/src/paste.rs
@@ -12,7 +12,7 @@ use std::fmt::Display;
 use std::fs::File;
 use std::io::{stdin, stdout, BufRead, BufReader, Read, Write};
 use std::path::Path;
-use uucore::error::{FromIo, UResult};
+use uucore::error::{FromIo, UResult, USimpleError};
 use uucore::{format_usage, help_about, help_usage};
 
 const ABOUT: &str = help_about!("paste.md");
@@ -129,6 +129,16 @@ fn paste(
         files.push(file);
     }
 
+    if delimiters.ends_with('\\') && !delimiters.ends_with("\\\\") {
+        return Err(USimpleError::new(
+            1,
+            format!(
+                "delimiter list ends with an unescaped backslash: {}",
+                delimiters
+            ),
+        ));
+    }
+
     let delimiters: Vec<char> = unescape(delimiters).chars().collect();
     let mut delim_count = 0;
     let mut delim_length = 1;
@@ -222,10 +232,8 @@ fn paste(
 }
 
 // Unescape all special characters
-// TODO: this will need work to conform to GNU implementation
 fn unescape(s: &str) -> String {
     s.replace("\\n", "\n")
         .replace("\\t", "\t")
         .replace("\\\\", "\\")
-        .replace('\\', "")
 }
diff --git a/src/uu/sort/sort.md b/src/uu/sort/sort.md
new file mode 100644
index 000000000..1d1aa5d5f
--- /dev/null
+++ b/src/uu/sort/sort.md
@@ -0,0 +1,21 @@
+<!-- spell-checker:ignore MbdfhnRrV -->
+
+# sort
+
+```
+sort [OPTION]... [FILE]...
+```
+
+Display sorted concatenation of all FILE(s). With no FILE, or when FILE is -, read standard input.
+
+## After help
+
+The key format is `FIELD[.CHAR][OPTIONS][,FIELD[.CHAR]][OPTIONS]`.
+
+Fields by default are separated by the first whitespace after a non-whitespace character. Use `-t` to specify a custom separator.
+In the default case, whitespace is appended at the beginning of each field. Custom separators however are not included in fields.
+
+`FIELD` and `CHAR` both start at 1 (i.e. they are 1-indexed). If there is no end specified after a comma, the end will be the end of the line.
+If `CHAR` is set 0, it means the end of the field. `CHAR` defaults to 1 for the start position and to 0 for the end position.
+
+Valid options are: `MbdfhnRrV`. They override the global options for this key.
diff --git a/src/uu/sort/src/sort.rs b/src/uu/sort/src/sort.rs
index 5b309e413..1744148f2 100644
--- a/src/uu/sort/src/sort.rs
+++ b/src/uu/sort/src/sort.rs
@@ -45,26 +45,15 @@ use std::str::Utf8Error;
 use unicode_width::UnicodeWidthStr;
 use uucore::display::Quotable;
 use uucore::error::{set_exit_code, strip_errno, UError, UResult, USimpleError, UUsageError};
-use uucore::format_usage;
 use uucore::parse_size::{ParseSizeError, Parser};
 use uucore::version_cmp::version_cmp;
+use uucore::{format_usage, help_about, help_section, help_usage};
 
 use crate::tmp_dir::TmpDirWrapper;
 
-const ABOUT: &str = "\
-    Display sorted concatenation of all FILE(s). \
-    With no FILE, or when FILE is -, read standard input.";
-const USAGE: &str = "{} [OPTION]... [FILE]...";
-
-const LONG_HELP_KEYS: &str = "The key format is FIELD[.CHAR][OPTIONS][,FIELD[.CHAR]][OPTIONS].
-
-Fields by default are separated by the first whitespace after a non-whitespace character. Use -t to specify a custom separator.
-In the default case, whitespace is appended at the beginning of each field. Custom separators however are not included in fields.
-
-FIELD and CHAR both start at 1 (i.e. they are 1-indexed). If there is no end specified after a comma, the end will be the end of the line.
-If CHAR is set 0, it means the end of the field. CHAR defaults to 1 for the start position and to 0 for the end position.
-
-Valid options are: MbdfhnRrV. They override the global options for this key.";
+const ABOUT: &str = help_about!("sort.md");
+const USAGE: &str = help_usage!("sort.md");
+const AFTER_HELP: &str = help_section!("after help", "sort.md");
 
 mod options {
     pub mod modes {
@@ -1292,7 +1281,7 @@ pub fn uu_app() -> Command {
     Command::new(uucore::util_name())
         .version(crate_version!())
         .about(ABOUT)
-        .after_help(LONG_HELP_KEYS)
+        .after_help(AFTER_HELP)
         .override_usage(format_usage(USAGE))
         .infer_long_args(true)
         .disable_help_flag(true)
diff --git a/src/uu/split/split.md b/src/uu/split/split.md
new file mode 100644
index 000000000..d3a481fd3
--- /dev/null
+++ b/src/uu/split/split.md
@@ -0,0 +1,13 @@
+<!-- spell-checker:ignore PREFI -->
+
+# split
+
+```
+split [OPTION]... [INPUT [PREFIX]]
+```
+
+Create output files containing consecutive or interleaved sections of input
+
+## After Help
+
+Output fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default size is 1000, and default PREFIX is 'x'. With no INPUT, or when INPUT is -, read standard input.
diff --git a/src/uu/split/src/split.rs b/src/uu/split/src/split.rs
index d737c8513..6e29e6f4b 100644
--- a/src/uu/split/src/split.rs
+++ b/src/uu/split/src/split.rs
@@ -5,7 +5,7 @@
 //  * For the full copyright and license information, please view the LICENSE
 //  * file that was distributed with this source code.
 
-// spell-checker:ignore (ToDO) PREFIXaa PREFIXab nbbbb ncccc
+// spell-checker:ignore nbbbb ncccc
 
 mod filenames;
 mod number;
@@ -23,9 +23,9 @@ use std::io::{stdin, BufRead, BufReader, BufWriter, ErrorKind, Read, Write};
 use std::path::Path;
 use uucore::display::Quotable;
 use uucore::error::{FromIo, UIoError, UResult, USimpleError, UUsageError};
-use uucore::format_usage;
 use uucore::parse_size::{parse_size, ParseSizeError};
 use uucore::uio_error;
+use uucore::{format_usage, help_about, help_section, help_usage};
 
 static OPT_BYTES: &str = "bytes";
 static OPT_LINE_BYTES: &str = "line-bytes";
@@ -47,11 +47,9 @@ static OPT_ELIDE_EMPTY_FILES: &str = "elide-empty-files";
 static ARG_INPUT: &str = "input";
 static ARG_PREFIX: &str = "prefix";
 
-const USAGE: &str = "{} [OPTION]... [INPUT [PREFIX]]";
-const AFTER_HELP: &str = "\
-    Output fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default \
-    size is 1000, and default PREFIX is 'x'. With no INPUT, or when INPUT is \
-    -, read standard input.";
+const ABOUT: &str = help_about!("split.md");
+const USAGE: &str = help_usage!("split.md");
+const AFTER_HELP: &str = help_section!("after help", "split.md");
 
 #[uucore::main]
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
@@ -66,7 +64,7 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 pub fn uu_app() -> Command {
     Command::new(uucore::util_name())
         .version(crate_version!())
-        .about("Create output files containing consecutive or interleaved sections of input")
+        .about(ABOUT)
         .after_help(AFTER_HELP)
         .override_usage(format_usage(USAGE))
         .infer_long_args(true)
diff --git a/src/uu/stdbuf/src/stdbuf.rs b/src/uu/stdbuf/src/stdbuf.rs
index 2bfb6f908..e02dd28bc 100644
--- a/src/uu/stdbuf/src/stdbuf.rs
+++ b/src/uu/stdbuf/src/stdbuf.rs
@@ -17,23 +17,11 @@ use tempfile::tempdir;
 use tempfile::TempDir;
 use uucore::error::{FromIo, UResult, USimpleError, UUsageError};
 use uucore::parse_size::parse_size;
-use uucore::{crash, format_usage};
+use uucore::{crash, format_usage, help_about, help_section, help_usage};
 
-static ABOUT: &str =
-    "Run COMMAND, with modified buffering operations for its standard streams.\n\n\
-     Mandatory arguments to long options are mandatory for short options too.";
-const USAGE: &str = "{} OPTION... COMMAND";
-static LONG_HELP: &str = "If MODE is 'L' the corresponding stream will be line buffered.\n\
-     This option is invalid with standard input.\n\n\
-     If MODE is '0' the corresponding stream will be unbuffered.\n\n\
-     Otherwise MODE is a number which may be followed by one of the following:\n\n\
-     KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.\n\
-     In this case the corresponding stream will be fully buffered with the buffer size set to \
-     MODE bytes.\n\n\
-     NOTE: If COMMAND adjusts the buffering of its standard streams ('tee' does for e.g.) then \
-     that will override corresponding settings changed by 'stdbuf'.\n\
-     Also some filters (like 'dd' and 'cat' etc.) don't use streams for I/O, \
-     and are thus unaffected by 'stdbuf' settings.\n";
+const ABOUT: &str = help_about!("stdbuf.md");
+const USAGE: &str = help_usage!("stdbuf.md");
+const LONG_HELP: &str = help_section!("after help", "stdbuf.md");
 
 mod options {
     pub const INPUT: &str = "input";
diff --git a/src/uu/stdbuf/stdbuf.md b/src/uu/stdbuf/stdbuf.md
new file mode 100644
index 000000000..e0062e627
--- /dev/null
+++ b/src/uu/stdbuf/stdbuf.md
@@ -0,0 +1,24 @@
+# stdbuf
+
+```
+stdbuf [OPTION]... COMMAND
+```
+
+Run `COMMAND`, with modified buffering operations for its standard streams.
+
+Mandatory arguments to long options are mandatory for short options too.
+
+## After Help
+
+If `MODE` is 'L' the corresponding stream will be line buffered.
+This option is invalid with standard input.
+
+If `MODE` is '0' the corresponding stream will be unbuffered.
+
+Otherwise, `MODE` is a number which may be followed by one of the following:
+
+KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.
+In this case the corresponding stream will be fully buffered with the buffer size set to `MODE` bytes.
+
+NOTE: If `COMMAND` adjusts the buffering of its standard streams (`tee` does for e.g.) then that will override corresponding settings changed by `stdbuf`.
+Also some filters (like `dd` and `cat` etc.) don't use streams for I/O, and are thus unaffected by `stdbuf` settings.
diff --git a/src/uu/stty/src/stty.rs b/src/uu/stty/src/stty.rs
index 928c3f177..e09662471 100644
--- a/src/uu/stty/src/stty.rs
+++ b/src/uu/stty/src/stty.rs
@@ -18,7 +18,7 @@ use std::ops::ControlFlow;
 use std::os::unix::fs::OpenOptionsExt;
 use std::os::unix::io::{AsRawFd, IntoRawFd, RawFd};
 use uucore::error::{UResult, USimpleError};
-use uucore::format_usage;
+use uucore::{format_usage, help_about, help_usage};
 
 #[cfg(not(any(
     target_os = "freebsd",
@@ -31,11 +31,8 @@ use uucore::format_usage;
 use flags::BAUD_RATES;
 use flags::{CONTROL_FLAGS, INPUT_FLAGS, LOCAL_FLAGS, OUTPUT_FLAGS};
 
-const USAGE: &str = "\
-    {} [-F DEVICE | --file=DEVICE] [SETTING]...
-    {} [-F DEVICE | --file=DEVICE] [-a|--all]
-    {} [-F DEVICE | --file=DEVICE] [-g|--save]";
-const SUMMARY: &str = "Print or change terminal characteristics.";
+const USAGE: &str = help_usage!("stty.md");
+const SUMMARY: &str = help_about!("stty.md");
 
 #[derive(Clone, Copy, Debug)]
 pub struct Flag<T> {
diff --git a/src/uu/stty/stty.md b/src/uu/stty/stty.md
new file mode 100644
index 000000000..6aa1decf5
--- /dev/null
+++ b/src/uu/stty/stty.md
@@ -0,0 +1,9 @@
+# stty
+
+```
+stty [-F DEVICE | --file=DEVICE] [SETTING]...
+stty [-F DEVICE | --file=DEVICE] [-a|--all]
+stty [-F DEVICE | --file=DEVICE] [-g|--save]
+```
+
+Print or change terminal characteristics.
diff --git a/src/uu/sum/src/sum.rs b/src/uu/sum/src/sum.rs
index 1134f2444..0ea415b13 100644
--- a/src/uu/sum/src/sum.rs
+++ b/src/uu/sum/src/sum.rs
@@ -13,11 +13,10 @@ use std::io::{stdin, Read};
 use std::path::Path;
 use uucore::display::Quotable;
 use uucore::error::{FromIo, UResult, USimpleError};
-use uucore::{format_usage, show};
+use uucore::{format_usage, help_about, help_usage, show};
 
-static USAGE: &str = "{} [OPTION]... [FILE]...";
-static ABOUT: &str = "Checksum and count the blocks in a file.\n\n\
-                      With no FILE, or when FILE is -, read standard input.";
+const USAGE: &str = help_usage!("sum.md");
+const ABOUT: &str = help_about!("sum.md");
 
 // This can be replaced with usize::div_ceil once it is stabilized.
 // This implementation approach is optimized for when `b` is a constant,
diff --git a/src/uu/sum/sum.md b/src/uu/sum/sum.md
new file mode 100644
index 000000000..ca3adb81f
--- /dev/null
+++ b/src/uu/sum/sum.md
@@ -0,0 +1,9 @@
+# sum
+
+```
+sum [OPTION]... [FILE]..."
+```
+
+Checksum and count the blocks in a file.
+
+With no FILE, or when FILE is -, read standard input.
diff --git a/src/uu/sync/src/sync.rs b/src/uu/sync/src/sync.rs
index 120e31dfe..e12703bca 100644
--- a/src/uu/sync/src/sync.rs
+++ b/src/uu/sync/src/sync.rs
@@ -19,10 +19,11 @@ use uucore::display::Quotable;
 #[cfg(any(target_os = "linux", target_os = "android"))]
 use uucore::error::FromIo;
 use uucore::error::{UResult, USimpleError};
-use uucore::format_usage;
+use uucore::{format_usage, help_about, help_usage};
+
+const ABOUT: &str = help_about!("sync.md");
+const USAGE: &str = help_usage!("sync.md");
 
-static ABOUT: &str = "Synchronize cached writes to persistent storage";
-const USAGE: &str = "{} [OPTION]... FILE...";
 pub mod options {
     pub static FILE_SYSTEM: &str = "file-system";
     pub static DATA: &str = "data";
diff --git a/src/uu/sync/sync.md b/src/uu/sync/sync.md
new file mode 100644
index 000000000..2fdd36339
--- /dev/null
+++ b/src/uu/sync/sync.md
@@ -0,0 +1,7 @@
+# sync
+
+```
+sync [OPTION]... FILE...
+```
+
+Synchronize cached writes to persistent storage
diff --git a/src/uu/timeout/src/timeout.rs b/src/uu/timeout/src/timeout.rs
index 153beea3d..531f29e82 100644
--- a/src/uu/timeout/src/timeout.rs
+++ b/src/uu/timeout/src/timeout.rs
@@ -22,12 +22,12 @@ use uucore::process::ChildExt;
 use uucore::signals::enable_pipe_errors;
 
 use uucore::{
-    format_usage, show_error,
+    format_usage, help_about, help_usage, show_error,
     signals::{signal_by_name_or_value, signal_name_by_value},
 };
 
-static ABOUT: &str = "Start COMMAND, and kill it if still running after DURATION.";
-const USAGE: &str = "{} [OPTION] DURATION COMMAND...";
+const ABOUT: &str = help_about!("timeout.md");
+const USAGE: &str = help_usage!("timeout.md");
 
 pub mod options {
     pub static FOREGROUND: &str = "foreground";
diff --git a/src/uu/timeout/timeout.md b/src/uu/timeout/timeout.md
new file mode 100644
index 000000000..f992ab327
--- /dev/null
+++ b/src/uu/timeout/timeout.md
@@ -0,0 +1,7 @@
+# timeout
+
+```
+timeout [OPTION] DURATION COMMAND...
+```
+
+Start `COMMAND`, and kill it if still running after `DURATION`.
diff --git a/src/uu/tr/src/tr.rs b/src/uu/tr/src/tr.rs
index 8ccd08366..9abbca631 100644
--- a/src/uu/tr/src/tr.rs
+++ b/src/uu/tr/src/tr.rs
@@ -13,17 +13,15 @@ use clap::{crate_version, Arg, ArgAction, Command};
 use nom::AsBytes;
 use operation::{translate_input, Sequence, SqueezeOperation, TranslateOperation};
 use std::io::{stdin, stdout, BufReader, BufWriter};
-use uucore::{format_usage, show};
+use uucore::{format_usage, help_about, help_section, help_usage, show};
 
 use crate::operation::DeleteOperation;
 use uucore::display::Quotable;
 use uucore::error::{UResult, USimpleError, UUsageError};
 
-const ABOUT: &str = "Translate or delete characters";
-const USAGE: &str = "{} [OPTION]... SET1 [SET2]";
-const LONG_USAGE: &str = "\
-    Translate, squeeze, and/or delete characters from standard input, \
-    writing to standard output.";
+const ABOUT: &str = help_about!("tr.md");
+const AFTER_HELP: &str = help_section!("after help", "tr.md");
+const USAGE: &str = help_usage!("tr.md");
 
 mod options {
     pub const COMPLEMENT: &str = "complement";
@@ -37,7 +35,7 @@ mod options {
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let args = args.collect_lossy();
 
-    let matches = uu_app().after_help(LONG_USAGE).try_get_matches_from(args)?;
+    let matches = uu_app().after_help(AFTER_HELP).try_get_matches_from(args)?;
 
     let delete_flag = matches.get_flag(options::DELETE);
     let complement_flag = matches.get_flag(options::COMPLEMENT);
diff --git a/src/uu/tr/tr.md b/src/uu/tr/tr.md
new file mode 100644
index 000000000..93349eeaa
--- /dev/null
+++ b/src/uu/tr/tr.md
@@ -0,0 +1,11 @@
+# tr
+
+```
+tr [OPTION]... SET1 [SET2]
+```
+
+Translate or delete characters
+
+## After help
+
+Translate, squeeze, and/or delete characters from standard input, writing to standard output.
diff --git a/tests/by-util/test_date.rs b/tests/by-util/test_date.rs
index a1bdda651..edad87bd6 100644
--- a/tests/by-util/test_date.rs
+++ b/tests/by-util/test_date.rs
@@ -334,6 +334,29 @@ fn test_invalid_format_string() {
     assert!(result.stderr_str().starts_with("date: invalid format "));
 }
 
+#[test]
+fn test_date_string_human() {
+    let date_formats = vec![
+        "1 year ago",
+        "1 year",
+        "2 months ago",
+        "15 days ago",
+        "1 week ago",
+        "5 hours ago",
+        "30 minutes ago",
+        "10 seconds",
+    ];
+    let re = Regex::new(r"^\d{4}-\d{2}-\d{2} \d{2}:\d{2}\n$").unwrap();
+    for date_format in date_formats {
+        new_ucmd!()
+            .arg("-d")
+            .arg(date_format)
+            .arg("+%Y-%m-%d %S:%M")
+            .succeeds()
+            .stdout_matches(&re);
+    }
+}
+
 #[test]
 fn test_invalid_date_string() {
     new_ucmd!()
diff --git a/tests/by-util/test_ls.rs b/tests/by-util/test_ls.rs
index 1a189a25a..84efb9daa 100644
--- a/tests/by-util/test_ls.rs
+++ b/tests/by-util/test_ls.rs
@@ -1,6 +1,6 @@
 // spell-checker:ignore (words) READMECAREFULLY birthtime doesntexist oneline somebackup lrwx somefile somegroup somehiddenbackup somehiddenfile tabsize aaaaaaaa bbbb cccc dddddddd ncccc
 
-#[cfg(feature = "feat_selinux")]
+#[cfg(any(unix, feature = "feat_selinux"))]
 use crate::common::util::expected_result;
 use crate::common::util::TestScenario;
 #[cfg(all(unix, feature = "chmod"))]
@@ -1276,7 +1276,7 @@ fn test_ls_long_formats() {
     // Zero or one "." for indicating a file with security context
 
     // Regex for three names, so all of author, group and owner
-    let re_three = Regex::new(r"[xrw-]{9}\.? \d ([-0-9_a-z_A-Z]+ ){3}0").unwrap();
+    let re_three = Regex::new(r"[xrw-]{9}\.? \d ([-0-9_a-z.A-Z]+ ){3}0").unwrap();
 
     #[cfg(unix)]
     let re_three_num = Regex::new(r"[xrw-]{9}\.? \d (\d+ ){3}0").unwrap();
@@ -1285,13 +1285,13 @@ fn test_ls_long_formats() {
     // - group and owner
     // - author and owner
     // - author and group
-    let re_two = Regex::new(r"[xrw-]{9}\.? \d ([-0-9_a-z_A-Z]+ ){2}0").unwrap();
+    let re_two = Regex::new(r"[xrw-]{9}\.? \d ([-0-9_a-z.A-Z]+ ){2}0").unwrap();
 
     #[cfg(unix)]
     let re_two_num = Regex::new(r"[xrw-]{9}\.? \d (\d+ ){2}0").unwrap();
 
     // Regex for one name: author, group or owner
-    let re_one = Regex::new(r"[xrw-]{9}\.? \d [-0-9_a-z_A-Z]+ 0").unwrap();
+    let re_one = Regex::new(r"[xrw-]{9}\.? \d [-0-9_a-z.A-Z]+ 0").unwrap();
 
     #[cfg(unix)]
     let re_one_num = Regex::new(r"[xrw-]{9}\.? \d \d+ 0").unwrap();
@@ -1640,88 +1640,103 @@ fn test_ls_styles() {
     at.touch("test");
 
     let re_full = Regex::new(
-        r"[a-z-]* \d* \w* \w* \d* \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d* (\+|\-)\d{4} test\n",
+        r"[a-z-]* \d* [\w.]* [\w.]* \d* \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d* (\+|\-)\d{4} test\n",
     )
     .unwrap();
     let re_long =
-        Regex::new(r"[a-z-]* \d* \w* \w* \d* \d{4}-\d{2}-\d{2} \d{2}:\d{2} test\n").unwrap();
-    let re_iso = Regex::new(r"[a-z-]* \d* \w* \w* \d* \d{2}-\d{2} \d{2}:\d{2} test\n").unwrap();
+        Regex::new(r"[a-z-]* \d* [\w.]* [\w.]* \d* \d{4}-\d{2}-\d{2} \d{2}:\d{2} test\n").unwrap();
+    let re_iso =
+        Regex::new(r"[a-z-]* \d* [\w.]* [\w.]* \d* \d{2}-\d{2} \d{2}:\d{2} test\n").unwrap();
     let re_locale =
-        Regex::new(r"[a-z-]* \d* \w* \w* \d* [A-Z][a-z]{2} ( |\d)\d \d{2}:\d{2} test\n").unwrap();
-    let re_custom_format = Regex::new(r"[a-z-]* \d* \w* \w* \d* \d{4}__\d{2} test\n").unwrap();
+        Regex::new(r"[a-z-]* \d* [\w.]* [\w.]* \d* [A-Z][a-z]{2} ( |\d)\d \d{2}:\d{2} test\n")
+            .unwrap();
+    let re_custom_format =
+        Regex::new(r"[a-z-]* \d* [\w.]* [\w.]* \d* \d{4}__\d{2} test\n").unwrap();
 
     //full-iso
-    let result = scene
+    scene
         .ucmd()
         .arg("-l")
         .arg("--time-style=full-iso")
-        .succeeds();
-    assert!(re_full.is_match(result.stdout_str()));
+        .succeeds()
+        .stdout_matches(&re_full);
     //long-iso
-    let result = scene
+    scene
         .ucmd()
         .arg("-l")
         .arg("--time-style=long-iso")
-        .succeeds();
-    assert!(re_long.is_match(result.stdout_str()));
+        .succeeds()
+        .stdout_matches(&re_long);
     //iso
-    let result = scene.ucmd().arg("-l").arg("--time-style=iso").succeeds();
-    assert!(re_iso.is_match(result.stdout_str()));
+    scene
+        .ucmd()
+        .arg("-l")
+        .arg("--time-style=iso")
+        .succeeds()
+        .stdout_matches(&re_iso);
     //locale
-    let result = scene.ucmd().arg("-l").arg("--time-style=locale").succeeds();
-    assert!(re_locale.is_match(result.stdout_str()));
+    scene
+        .ucmd()
+        .arg("-l")
+        .arg("--time-style=locale")
+        .succeeds()
+        .stdout_matches(&re_locale);
 
     //+FORMAT
-    let result = scene
+    scene
         .ucmd()
         .arg("-l")
         .arg("--time-style=+%Y__%M")
-        .succeeds();
-    assert!(re_custom_format.is_match(result.stdout_str()));
+        .succeeds()
+        .stdout_matches(&re_custom_format);
 
     // Also fails due to not having full clap support for time_styles
     scene.ucmd().arg("-l").arg("-time-style=invalid").fails();
 
     //Overwrite options tests
-    let result = scene
+    scene
         .ucmd()
         .arg("-l")
         .arg("--time-style=long-iso")
         .arg("--time-style=iso")
-        .succeeds();
-    assert!(re_iso.is_match(result.stdout_str()));
-    let result = scene
+        .succeeds()
+        .stdout_matches(&re_iso);
+    scene
         .ucmd()
         .arg("--time-style=iso")
         .arg("--full-time")
-        .succeeds();
-    assert!(re_full.is_match(result.stdout_str()));
-    let result = scene
+        .succeeds()
+        .stdout_matches(&re_full);
+    scene
         .ucmd()
         .arg("--full-time")
         .arg("--time-style=iso")
-        .succeeds();
-    assert!(re_iso.is_match(result.stdout_str()));
+        .succeeds()
+        .stdout_matches(&re_iso);
 
-    let result = scene
+    scene
         .ucmd()
         .arg("--full-time")
         .arg("--time-style=iso")
         .arg("--full-time")
-        .succeeds();
-    assert!(re_full.is_match(result.stdout_str()));
+        .succeeds()
+        .stdout_matches(&re_full);
 
-    let result = scene
+    scene
         .ucmd()
         .arg("--full-time")
         .arg("-x")
         .arg("-l")
-        .succeeds();
-    assert!(re_full.is_match(result.stdout_str()));
+        .succeeds()
+        .stdout_matches(&re_full);
 
     at.touch("test2");
-    let result = scene.ucmd().arg("--full-time").arg("-x").succeeds();
-    assert_eq!(result.stdout_str(), "test  test2\n");
+    scene
+        .ucmd()
+        .arg("--full-time")
+        .arg("-x")
+        .succeeds()
+        .stdout_is("test  test2\n");
 }
 
 #[test]
@@ -1776,9 +1791,15 @@ fn test_ls_order_time() {
         at.open("test-4").metadata().unwrap().accessed().unwrap();
 
         // It seems to be dependent on the platform whether the access time is actually set
-        #[cfg(all(unix, not(target_os = "android")))]
-        result.stdout_only("test-3\ntest-4\ntest-2\ntest-1\n");
-        #[cfg(any(windows, target_os = "android"))]
+        #[cfg(unix)]
+        {
+            let expected = unwrap_or_return!(expected_result(&scene, &["-t", arg]));
+            at.open("test-3").metadata().unwrap().accessed().unwrap();
+            at.open("test-4").metadata().unwrap().accessed().unwrap();
+
+            result.stdout_only(expected.stdout_str());
+        }
+        #[cfg(windows)]
         result.stdout_only("test-4\ntest-3\ntest-2\ntest-1\n");
     }
 
diff --git a/tests/by-util/test_mktemp.rs b/tests/by-util/test_mktemp.rs
index f99f92a80..907f8cf1d 100644
--- a/tests/by-util/test_mktemp.rs
+++ b/tests/by-util/test_mktemp.rs
@@ -23,6 +23,7 @@ static TEST_TEMPLATE7: &str = "XXXtemplate"; // spell-checker:disable-line
 static TEST_TEMPLATE8: &str = "tempXXXl/ate";
 #[cfg(windows)]
 static TEST_TEMPLATE8: &str = "tempXXXl\\ate";
+static TEST_TEMPLATE9: &str = "a.XXXX";
 
 #[cfg(not(windows))]
 const TMPDIR: &str = "TMPDIR";
@@ -569,6 +570,34 @@ fn test_template_path_separator() {
         ));
 }
 
+/// Test that a prefix with a point is valid.
+#[test]
+fn test_prefix_template_separator() {
+    new_ucmd!()
+        .args(&["-p", ".", "-t", TEST_TEMPLATE9])
+        .succeeds();
+}
+
+#[test]
+fn test_prefix_template_with_path_separator() {
+    #[cfg(not(windows))]
+    new_ucmd!()
+        .args(&["-t", "a/XXX"])
+        .fails()
+        .stderr_only(format!(
+            "mktemp: invalid template, {}, contains directory separator\n",
+            "a/XXX".quote()
+        ));
+    #[cfg(windows)]
+    new_ucmd!()
+        .args(&["-t", r"a\XXX"])
+        .fails()
+        .stderr_only(format!(
+            "mktemp: invalid template, {}, contains directory separator\n",
+            r"a\XXX".quote()
+        ));
+}
+
 /// Test that a suffix with a path separator is invalid.
 #[test]
 fn test_suffix_path_separator() {
diff --git a/tests/by-util/test_mv.rs b/tests/by-util/test_mv.rs
index 2c5f85910..29a22ce10 100644
--- a/tests/by-util/test_mv.rs
+++ b/tests/by-util/test_mv.rs
@@ -57,6 +57,63 @@ fn test_mv_move_file_into_dir() {
     assert!(at.file_exists(format!("{dir}/{file}")));
 }
 
+#[test]
+fn test_mv_move_file_into_dir_with_target_arg() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let dir = "test_mv_move_file_into_dir_with_target_arg_dir";
+    let file = "test_mv_move_file_into_dir_with_target_arg_file";
+
+    at.mkdir(dir);
+    at.touch(file);
+
+    ucmd.arg("--target")
+        .arg(dir)
+        .arg(file)
+        .succeeds()
+        .no_stderr();
+
+    assert!(at.file_exists(format!("{dir}/{file}")))
+}
+
+#[test]
+fn test_mv_move_file_into_file_with_target_arg() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let file1 = "test_mv_move_file_into_file_with_target_arg_file1";
+    let file2 = "test_mv_move_file_into_file_with_target_arg_file2";
+
+    at.touch(file1);
+    at.touch(file2);
+
+    ucmd.arg("--target")
+        .arg(file1)
+        .arg(file2)
+        .fails()
+        .stderr_is(format!("mv: target directory '{file1}': Not a directory\n"));
+
+    assert!(at.file_exists(file1))
+}
+
+#[test]
+fn test_mv_move_multiple_files_into_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    let file1 = "test_mv_move_multiple_files_into_file1";
+    let file2 = "test_mv_move_multiple_files_into_file2";
+    let file3 = "test_mv_move_multiple_files_into_file3";
+
+    at.touch(file1);
+    at.touch(file2);
+    at.touch(file3);
+
+    ucmd.arg(file1)
+        .arg(file2)
+        .arg(file3)
+        .fails()
+        .stderr_is(format!("mv: target '{file3}': Not a directory\n"));
+
+    assert!(at.file_exists(file1));
+    assert!(at.file_exists(file2));
+}
+
 #[test]
 fn test_mv_move_file_between_dirs() {
     let (at, mut ucmd) = at_and_ucmd!();
@@ -234,8 +291,9 @@ fn test_mv_no_clobber() {
     ucmd.arg("-n")
         .arg(file_a)
         .arg(file_b)
-        .succeeds()
-        .no_stderr();
+        .fails()
+        .code_is(1)
+        .stderr_only(format!("mv: not replacing '{file_b}'\n"));
 
     assert!(at.file_exists(file_a));
     assert!(at.file_exists(file_b));
@@ -909,7 +967,9 @@ fn test_mv_backup_dir() {
         .arg(dir_a)
         .arg(dir_b)
         .succeeds()
-        .stdout_only(format!("'{dir_a}' -> '{dir_b}' (backup: '{dir_b}~')\n"));
+        .stdout_only(format!(
+            "renamed '{dir_a}' -> '{dir_b}' (backup: '{dir_b}~')\n"
+        ));
 
     assert!(!at.dir_exists(dir_a));
     assert!(at.dir_exists(dir_b));
@@ -981,7 +1041,7 @@ fn test_mv_verbose() {
         .arg(file_a)
         .arg(file_b)
         .succeeds()
-        .stdout_only(format!("'{file_a}' -> '{file_b}'\n"));
+        .stdout_only(format!("renamed '{file_a}' -> '{file_b}'\n"));
 
     at.touch(file_a);
     scene
@@ -990,7 +1050,9 @@ fn test_mv_verbose() {
         .arg(file_a)
         .arg(file_b)
         .succeeds()
-        .stdout_only(format!("'{file_a}' -> '{file_b}' (backup: '{file_b}~')\n"));
+        .stdout_only(format!(
+            "renamed '{file_a}' -> '{file_b}' (backup: '{file_b}~')\n"
+        ));
 }
 
 #[test]
diff --git a/tests/by-util/test_nice.rs b/tests/by-util/test_nice.rs
index e2af88dfd..4e8d5a2ee 100644
--- a/tests/by-util/test_nice.rs
+++ b/tests/by-util/test_nice.rs
@@ -1,11 +1,14 @@
+// spell-checker:ignore libc's
 use crate::common::util::TestScenario;
 
 #[test]
 #[cfg(not(target_os = "android"))]
 fn test_get_current_niceness() {
-    // NOTE: this assumes the test suite is being run with a default niceness
-    // of 0, which may not necessarily be true
-    new_ucmd!().run().stdout_is("0\n");
+    // Test that the nice command with no arguments returns the default nice
+    // value, which we determine by querying libc's `nice` in our own process.
+    new_ucmd!()
+        .run()
+        .stdout_is(format!("{}\n", unsafe { libc::nice(0) }));
 }
 
 #[test]
diff --git a/tests/by-util/test_paste.rs b/tests/by-util/test_paste.rs
index 2e119846e..da92daa32 100644
--- a/tests/by-util/test_paste.rs
+++ b/tests/by-util/test_paste.rs
@@ -156,6 +156,39 @@ fn test_multi_stdin() {
     }
 }
 
+#[test]
+// TODO: make this test work on Windows
+#[cfg(not(windows))]
+fn test_delimiter_list_ending_with_escaped_backslash() {
+    for d in ["-d", "--delimiters"] {
+        let (at, mut ucmd) = at_and_ucmd!();
+        let mut ins = vec![];
+        for (i, _in) in ["a\n", "b\n"].iter().enumerate() {
+            let file = format!("in{}", i);
+            at.write(&file, _in);
+            ins.push(file);
+        }
+        ucmd.args(&[d, "\\\\"])
+            .args(&ins)
+            .succeeds()
+            .stdout_is("a\\b\n");
+    }
+}
+
+#[test]
+fn test_delimiter_list_ending_with_unescaped_backslash() {
+    for d in ["-d", "--delimiters"] {
+        new_ucmd!()
+            .args(&[d, "\\"])
+            .fails()
+            .stderr_contains("delimiter list ends with an unescaped backslash: \\");
+        new_ucmd!()
+            .args(&[d, "_\\"])
+            .fails()
+            .stderr_contains("delimiter list ends with an unescaped backslash: _\\");
+    }
+}
+
 #[test]
 fn test_data() {
     for example in EXAMPLE_DATA {
diff --git a/util/build-gnu.sh b/util/build-gnu.sh
index 486cf3227..8e78c5a99 100755
--- a/util/build-gnu.sh
+++ b/util/build-gnu.sh
@@ -63,6 +63,8 @@ for binary in $(./build-aux/gen-lists-of-programs.sh --list-progs); do
 done
 
 if test -f gnu-built; then
+    # Change the PATH in the Makefile to test the uutils coreutils instead of the GNU coreutils
+    sed -i "s/^[[:blank:]]*PATH=.*/  PATH='${UU_BUILD_DIR//\//\\/}\$(PATH_SEPARATOR)'\"\$\$PATH\" \\\/" Makefile
     echo "GNU build already found. Skip"
     echo "'rm -f $(pwd)/gnu-built' to force the build"
     echo "Note: the customization of the tests will still happen"
@@ -220,6 +222,7 @@ sed -i -Ez "s/\n([^\n#]*pad-3\.2[^\n]*)\n([^\n]*)\n([^\n]*)/\n# uutils\/numfmt s
 
 # Update the GNU error message to match the one generated by clap
 sed -i -e "s/\$prog: multiple field specifications/error: The argument '--field <FIELDS>' was provided more than once, but cannot be used multiple times\n\nUsage: numfmt [OPTION]... [NUMBER]...\n\n\nFor more information try '--help'/g" tests/misc/numfmt.pl
+sed -i -e "s/Try 'mv --help' for more information/For more information, try '--help'/g" -e "s/mv: missing file operand/error: the following required arguments were not provided:\n  <files>...\n\nUsage: mv [OPTION]... [-T] SOURCE DEST\n       mv [OPTION]... SOURCE... DIRECTORY\n       mv [OPTION]... -t DIRECTORY SOURCE...\n/g" -e "s/mv: missing destination file operand after 'no-file'/error: The argument '<files>...' requires at least 2 values, but only 1 was provided\n\nUsage: mv [OPTION]... [-T] SOURCE DEST\n       mv [OPTION]... SOURCE... DIRECTORY\n       mv [OPTION]... -t DIRECTORY SOURCE...\n/g" tests/mv/diag.sh
 
 # GNU doesn't support width > INT_MAX
 # disable these test cases