diff --git a/src/uu/tsort/locales/en-US.ftl b/src/uu/tsort/locales/en-US.ftl
index a4b4218c3f6..2b2f90a1e01 100644
--- a/src/uu/tsort/locales/en-US.ftl
+++ b/src/uu/tsort/locales/en-US.ftl
@@ -6,3 +6,6 @@ tsort-usage = tsort [OPTIONS] FILE
 tsort-error-is-dir = read error: Is a directory
 tsort-error-odd = input contains an odd number of tokens
 tsort-error-loop = input contains a loop:
+tsort-error-extra-operand = extra operand { $operand }
+  Try '{ $util } --help' for more information.
+tsort-error-at-least-one-input = at least one input
diff --git a/src/uu/tsort/locales/fr-FR.ftl b/src/uu/tsort/locales/fr-FR.ftl
index 18349b978ca..c3594e7a212 100644
--- a/src/uu/tsort/locales/fr-FR.ftl
+++ b/src/uu/tsort/locales/fr-FR.ftl
@@ -6,3 +6,6 @@ tsort-usage = tsort [OPTIONS] FILE
 tsort-error-is-dir = erreur de lecture : c'est un répertoire
 tsort-error-odd = l'entrée contient un nombre impair de jetons
 tsort-error-loop = l'entrée contient une boucle :
+tsort-error-extra-operand = opérande supplémentaire { $operand }
+  Essayez '{ $util } --help' pour plus d'informations.
+tsort-error-at-least-one-input = au moins une entrée
diff --git a/src/uu/tsort/src/tsort.rs b/src/uu/tsort/src/tsort.rs
index 4b52e1e4534..67d8cca2630 100644
--- a/src/uu/tsort/src/tsort.rs
+++ b/src/uu/tsort/src/tsort.rs
@@ -3,14 +3,14 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 //spell-checker:ignore TAOCP indegree
-use clap::{Arg, Command};
+use clap::{Arg, ArgAction, Command};
 use std::collections::hash_map::Entry;
 use std::collections::{HashMap, VecDeque};
 use std::ffi::OsString;
 use std::path::Path;
 use thiserror::Error;
 use uucore::display::Quotable;
-use uucore::error::{UError, UResult};
+use uucore::error::{UError, UResult, USimpleError};
 use uucore::{format_usage, show};
 
 use uucore::translate;
@@ -49,15 +49,36 @@ impl UError for LoopNode<'_> {}
 pub fn uumain(args: impl uucore::Args) -> UResult<()> {
     let matches = uucore::clap_localization::handle_clap_result(uu_app(), args)?;
 
-    let input = matches
-        .get_one::<OsString>(options::FILE)
-        .expect("Value is required by clap");
+    let mut inputs: Vec<OsString> = matches
+        .get_many::<OsString>(options::FILE)
+        .map(|vals| vals.cloned().collect())
+        .unwrap_or_default();
+
+    if inputs.is_empty() {
+        inputs.push(OsString::from("-"));
+    }
+
+    if inputs.len() > 1 {
+        return Err(USimpleError::new(
+            1,
+            translate!(
+                "tsort-error-extra-operand",
+                "operand" => inputs[1].quote(),
+                "util" => uucore::util_name()
+            ),
+        ));
+    }
+
+    let input = inputs
+        .into_iter()
+        .next()
+        .expect(translate!("tsort-error-at-least-one-input").as_str());
 
     let data = if input == "-" {
         let stdin = std::io::stdin();
         std::io::read_to_string(stdin)?
     } else {
-        let path = Path::new(input);
+        let path = Path::new(&input);
         if path.is_dir() {
             return Err(TsortError::IsDir(input.to_string_lossy().to_string()).into());
         }
@@ -96,12 +117,19 @@ pub fn uu_app() -> Command {
         .override_usage(format_usage(&translate!("tsort-usage")))
         .about(translate!("tsort-about"))
         .infer_long_args(true)
+        .arg(
+            Arg::new("warn")
+                .short('w')
+                .action(ArgAction::SetTrue)
+                .hide(true),
+        )
         .arg(
             Arg::new(options::FILE)
-                .default_value("-")
                 .hide(true)
                 .value_parser(clap::value_parser!(OsString))
-                .value_hint(clap::ValueHint::FilePath),
+                .value_hint(clap::ValueHint::FilePath)
+                .num_args(0..)
+                .action(ArgAction::Append),
         )
 }
 
@@ -190,7 +218,7 @@ impl<'input> Graph<'input> {
             let v = self.find_next_node(&mut independent_nodes_queue);
             println!("{v}");
             if let Some(node_to_process) = self.nodes.remove(v) {
-                for successor_name in node_to_process.successor_names {
+                for successor_name in node_to_process.successor_names.into_iter().rev() {
                     let successor_node = self.nodes.get_mut(successor_name).unwrap();
                     successor_node.predecessor_count -= 1;
                     if successor_node.predecessor_count == 0 {
diff --git a/src/uucore/src/lib/mods/clap_localization.rs b/src/uucore/src/lib/mods/clap_localization.rs
index e0a0ce84e8c..cfc30ab22fd 100644
--- a/src/uucore/src/lib/mods/clap_localization.rs
+++ b/src/uucore/src/lib/mods/clap_localization.rs
@@ -205,7 +205,6 @@ impl<'a> ErrorFormatter<'a> {
                     "value" => self.color_mgr.colorize(&value, Color::Yellow),
                     "option" => self.color_mgr.colorize(&option, Color::Green)
                 );
-
                 // Include validation error if present
                 match err.source() {
                     Some(source) if matches!(err.kind(), ErrorKind::ValueValidation) => {
diff --git a/tests/by-util/test_tsort.rs b/tests/by-util/test_tsort.rs
index 077fd26b772..64fe97385df 100644
--- a/tests/by-util/test_tsort.rs
+++ b/tests/by-util/test_tsort.rs
@@ -77,7 +77,7 @@ fn test_multiple_arguments() {
         .arg("call_graph.txt")
         .arg("invalid_file")
         .fails()
-        .stderr_contains("unexpected argument 'invalid_file' found");
+        .stderr_contains("extra operand 'invalid_file'");
 }
 
 #[test]
@@ -119,7 +119,7 @@ fn test_two_cycles() {
     new_ucmd!()
         .pipe_in("a b b c c b b d d b")
         .fails_with_code(1)
-        .stdout_is("a\nb\nc\nd\n")
+        .stdout_is("a\nb\nd\nc\n")
         .stderr_is("tsort: -: input contains a loop:\ntsort: b\ntsort: c\ntsort: -: input contains a loop:\ntsort: b\ntsort: d\n");
 }
 
@@ -153,3 +153,95 @@ fn test_loop_for_iterative_dfs_correctness() {
         .fails_with_code(1)
         .stderr_contains("tsort: -: input contains a loop:\ntsort: B\ntsort: C");
 }
+
+const TSORT_LOOP_STDERR: &str = "tsort: f: input contains a loop:\ntsort: s\ntsort: t\n";
+const TSORT_LOOP_STDERR_AC: &str = "tsort: f: input contains a loop:\ntsort: a\ntsort: b\ntsort: f: input contains a loop:\ntsort: a\ntsort: c\n";
+const TSORT_ODD_ERROR: &str = "tsort: -: input contains an odd number of tokens\n";
+const TSORT_EXTRA_OPERAND_ERROR: &str =
+    "tsort: extra operand 'g'\nTry 'tsort --help' for more information.\n";
+
+#[test]
+fn test_cycle_loop_from_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.write("f", "t b\nt s\ns t\n");
+
+    ucmd.arg("f")
+        .fails_with_code(1)
+        .stdout_is("s\nt\nb\n")
+        .stderr_is(TSORT_LOOP_STDERR);
+}
+
+#[test]
+fn test_cycle_loop_with_extra_node_from_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.write("f", "t x\nt s\ns t\n");
+
+    ucmd.arg("f")
+        .fails_with_code(1)
+        .stdout_is("s\nt\nx\n")
+        .stderr_is(TSORT_LOOP_STDERR);
+}
+
+#[test]
+fn test_cycle_loop_multiple_loops_from_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.write("f", "a a\na b\na c\nc a\nb a\n");
+
+    ucmd.arg("f")
+        .fails_with_code(1)
+        .stdout_is("a\nc\nb\n")
+        .stderr_is(TSORT_LOOP_STDERR_AC);
+}
+
+#[test]
+fn test_posix_graph_examples() {
+    new_ucmd!()
+        .pipe_in("a b c c d e\ng g\nf g e f\nh h\n")
+        .succeeds()
+        .stdout_only("a\nc\nd\nh\nb\ne\nf\ng\n");
+
+    new_ucmd!()
+        .pipe_in("b a\nd c\nz h x h r h\n")
+        .succeeds()
+        .stdout_only("b\nd\nr\nx\nz\na\nc\nh\n");
+}
+
+#[test]
+fn test_linear_tree_graphs() {
+    new_ucmd!()
+        .pipe_in("a b b c c d d e e f f g\n")
+        .succeeds()
+        .stdout_only("a\nb\nc\nd\ne\nf\ng\n");
+
+    new_ucmd!()
+        .pipe_in("a b b c c d d e e f f g\nc x x y y z\n")
+        .succeeds()
+        .stdout_only("a\nb\nc\nx\nd\ny\ne\nz\nf\ng\n");
+
+    new_ucmd!()
+        .pipe_in("a b b c c d d e e f f g\nc x x y y z\nf r r s s t\n")
+        .succeeds()
+        .stdout_only("a\nb\nc\nx\nd\ny\ne\nz\nf\nr\ng\ns\nt\n");
+}
+
+#[test]
+fn test_odd_number_of_tokens() {
+    new_ucmd!()
+        .pipe_in("a\n")
+        .fails_with_code(1)
+        .stdout_is("")
+        .stderr_is(TSORT_ODD_ERROR);
+}
+
+#[test]
+fn test_only_one_input_file() {
+    let (at, mut ucmd) = at_and_ucmd!();
+    at.write("f", "");
+    at.write("g", "");
+
+    ucmd.arg("f")
+        .arg("g")
+        .fails_with_code(1)
+        .stdout_is("")
+        .stderr_is(TSORT_EXTRA_OPERAND_ERROR);
+}
diff --git a/tests/fixtures/tsort/call_graph.expected b/tests/fixtures/tsort/call_graph.expected
index e33aa72bd04..df1b950f627 100644
--- a/tests/fixtures/tsort/call_graph.expected
+++ b/tests/fixtures/tsort/call_graph.expected
@@ -1,17 +1,17 @@
 main
-parse_options
-tail_file
 tail_forever
-tail
+tail_file
+parse_options
 recheck
+tail
 write_header
-tail_lines
-tail_bytes
 pretty_name
-start_lines
-file_lines
-pipe_lines
-xlseek
-start_bytes
+tail_bytes
+tail_lines
 pipe_bytes
+start_bytes
+xlseek
+pipe_lines
+file_lines
+start_lines
 dump_remainder
diff --git a/util/gnu-patches/series b/util/gnu-patches/series
index 451fe99daae..2d9b30b2cc1 100644
--- a/util/gnu-patches/series
+++ b/util/gnu-patches/series
@@ -7,7 +7,6 @@ tests_env_env-S.pl.patch
 tests_invalid_opt.patch
 tests_ls_no_cap.patch
 tests_sort_merge.pl.patch
-tests_tsort.patch
 tests_du_move_dir_while_traversing.patch
 test_mkdir_restorecon.patch
 error_msg_uniq.diff
diff --git a/util/gnu-patches/tests_tsort.patch b/util/gnu-patches/tests_tsort.patch
deleted file mode 100644
index 1cc1603ee8f..00000000000
--- a/util/gnu-patches/tests_tsort.patch
+++ /dev/null
@@ -1,17 +0,0 @@
-Index: gnu/tests/misc/tsort.pl
-===================================================================
---- gnu.orig/tests/misc/tsort.pl
-+++ gnu/tests/misc/tsort.pl
-@@ -54,8 +54,10 @@ my @Tests =
-
-    ['only-one', {IN => {f => ""}}, {IN => {g => ""}},
-     {EXIT => 1},
--    {ERR => "tsort: extra operand 'g'\n"
--     . "Try 'tsort --help' for more information.\n"}],
-+    {ERR => "tsort: error: unexpected argument 'g' found\n\n"
-+         . "Usage: tsort [OPTIONS] FILE\n\n"
-+         . "For more information, try '--help'.\n"
-+    }],
-   );
-
- my $save_temps = $ENV{DEBUG};