diff --git a/src/engine.rs b/src/engine.rs
index 528004d7..06ddc5a9 100644
--- a/src/engine.rs
+++ b/src/engine.rs
@@ -1699,20 +1699,6 @@ impl Reedline {
     /// Executes [`EditCommand`] actions by modifying the internal state appropriately. Does not output itself.
     pub fn run_edit_commands(&mut self, commands: &[EditCommand]) {
         if self.input_mode == InputMode::HistoryTraversal {
-            if matches!(
-                self.history_cursor.get_navigation(),
-                HistoryNavigationQuery::Normal(_)
-            ) {
-                if let Some(string) = self.history_cursor.string_at_cursor() {
-                    // NOTE: `set_buffer` resets the insertion point,
-                    // which we should avoid during history navigation through the same buffer
-                    // https://github.com/nushell/reedline/pull/899
-                    if string != self.editor.get_buffer() {
-                        self.editor
-                            .set_buffer(string, UndoBehavior::HistoryNavigation);
-                    }
-                }
-            }
             self.input_mode = InputMode::Regular;
         }
 
@@ -2230,6 +2216,7 @@ impl Reedline {
         Ok(messages)
     }
 
+    #[allow(unused_variables)]
     fn submit_buffer(&mut self, prompt: &dyn Prompt) -> io::Result<EventStatus> {
         let buffer = self.editor.get_buffer().to_string();
         self.hide_hints = true;
@@ -2238,6 +2225,8 @@ impl Reedline {
             self.repaint(transient_prompt.as_ref())?;
             self.transient_prompt = Some(transient_prompt);
         } else {
+            // Don't repaint when running unit test as it will fill up stdout with garbage
+            #[cfg(not(test))]
             self.repaint(prompt)?;
         }
         if !buffer.is_empty() {
@@ -2270,8 +2259,7 @@ impl Reedline {
 mod tests {
     use super::*;
     use crate::terminal_extensions::semantic_prompt::PromptKind;
-    use crate::DefaultPrompt;
-    use rstest::rstest;
+    use crate::{ColumnarMenu, DefaultPrompt, MenuBuilder};
 
     #[test]
     fn test_cursor_position_after_multiline_history_navigation() {
@@ -2524,42 +2512,50 @@ mod tests {
         assert_eq!(reedline.current_buffer_contents(), "sudo git commit");
     }
 
-    #[rstest]
-    #[case("\"hello gc", false)]
-    #[case("'hello gc", false)]
-    #[case("\"hello\" gc", true)]
-    #[case("'Сегодня хороший gc", false)]
-    #[case("'Сегодня' gc", true)]
-    #[case("'今日はいい日だ gc", false)]
-    #[case("'🔥🎉 gc", false)]
-    fn abbreviation_string_detection_with_override(
-        #[case] buffer: &str,
-        #[case] should_expand: bool,
-    ) {
-        let mut reedline = reedline_with_abbrevs_and_string_lit_override(&[("gc", "git commit")]);
-        set_buffer_at_end(&mut reedline, buffer);
-        assert_eq!(
-            reedline.try_expand_abbreviation_at_cursor(true).is_some(),
-            should_expand
-        );
+    #[test]
+    fn abbreviation_string_detection_with_override() {
+        let cases = [
+            ("\"hello gc", false),
+            ("'hello gc", false),
+            ("\"hello\" gc", true),
+            ("'Сегодня хороший gc", false),
+            ("'Сегодня' gc", true),
+            ("'今日はいい日だ gc", false),
+            ("'🔥🎉 gc", false),
+        ];
+
+        for (buffer, should_expand) in cases {
+            let mut reedline =
+                reedline_with_abbrevs_and_string_lit_override(&[("gc", "git commit")]);
+            set_buffer_at_end(&mut reedline, buffer);
+            assert_eq!(
+                reedline.try_expand_abbreviation_at_cursor(true).is_some(),
+                should_expand
+            );
+        }
     }
 
-    #[rstest]
-    #[case("\"hello gc")]
-    #[case("'hello gc")]
-    #[case("\"hello\" gc")]
-    #[case("'Сегодня хороший gc")]
-    #[case("'Сегодня' gc")]
-    #[case("'今日はいい日だ gc")]
-    #[case("'🔥🎉 gc")]
-    fn abbreviation_string_detection_default(#[case] buffer: &str) {
-        let mut reedline =
-            reedline_with_abbrevs_and_default_string_lit_check(&[("gc", "git commit")]);
-        set_buffer_at_end(&mut reedline, buffer);
-        assert!(
-            reedline.try_expand_abbreviation_at_cursor(true).is_some(),
-            "must expand when highlighter does not override is_inside_string_literal"
-        );
+    #[test]
+    fn abbreviation_string_detection_default() {
+        let cases = [
+            ("\"hello gc"),
+            ("'hello gc"),
+            ("\"hello\" gc"),
+            ("'Сегодня хороший gc"),
+            ("'Сегодня' gc"),
+            ("'今日はいい日だ gc"),
+            ("'🔥🎉 gc"),
+        ];
+
+        for buffer in cases {
+            let mut reedline =
+                reedline_with_abbrevs_and_default_string_lit_check(&[("gc", "git commit")]);
+            set_buffer_at_end(&mut reedline, buffer);
+            assert!(
+                reedline.try_expand_abbreviation_at_cursor(true).is_some(),
+                "must expand when highlighter does not override is_inside_string_literal"
+            );
+        }
     }
 
     #[test]
@@ -2585,9 +2581,9 @@ mod tests {
     }
 
     #[cfg(feature = "bashisms")]
-    fn reedline_with_history_and_string_lit_check(entries: &[&str]) -> Reedline {
+    fn reedline_with_history_default(entries: &[&str]) -> Reedline {
         let mut reedline =
-            Reedline::create().with_highlighter(Box::new(ExampleHighlighter::default()));
+            Reedline::create().with_highlighter(Box::new(SimpleMatchHighlighter::default()));
         for entry in entries {
             reedline
                 .history
@@ -2597,52 +2593,179 @@ mod tests {
         reedline
     }
 
+    #[test]
     #[cfg(feature = "bashisms")]
-    fn reedline_with_history_default(entries: &[&str]) -> Reedline {
-        let mut reedline =
-            Reedline::create().with_highlighter(Box::new(SimpleMatchHighlighter::default()));
-        for entry in entries {
+    fn bang_always_expands_without_override() {
+        let cases = [
+            "\"echo !!",
+            "'echo !!",
+            "'echo' !!",
+            "\"echo !git",
+            "'echo !git",
+            "'Сегодня !!",
+            "'今日は !!",
+            "'🔥 !!",
+        ];
+
+        for buffer in cases {
+            let mut reedline = reedline_with_history_default(&["git status"]);
+            set_buffer_at_end(&mut reedline, buffer);
+            assert!(
+                reedline.parse_bang_command().is_some(),
+                "must expand when highlighter does not override is_inside_string_literal"
+            );
+        }
+    }
+
+    #[test]
+    fn test_move_to_line_start() {
+        let cases = [
+            "",
+            "line of text",
+"longgggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg line of text"
+        ];
+
+        for input in cases {
+            let mut reedline = Reedline::create();
+            let prompt = DefaultPrompt::default();
+
+            let insert_input_event =
+                ReedlineEvent::Edit(vec![EditCommand::InsertString(input.to_string())]);
+            let move_to_line_start_event =
+                ReedlineEvent::Edit(vec![EditCommand::MoveToLineStart { select: false }]);
+
+            // Have to resize, or painting.utils.estimate_single_line_wraps panics with divide-by-zero.
             reedline
-                .history
-                .save(HistoryItem::from_command_line(*entry))
-                .expect("failed to save history");
+                .handle_event(&prompt, ReedlineEvent::Resize(u16::MAX, u16::MAX))
+                .unwrap();
+
+            // Write the string, and then move to the start of the line.
+            reedline.handle_event(&prompt, insert_input_event).unwrap();
+            reedline
+                .handle_event(&prompt, move_to_line_start_event.clone())
+                .unwrap();
+            assert_eq!(reedline.editor.line_buffer().insertion_point(), 0);
+
+            // Enter the string into history, then scroll back up and move to the start of the line.
+            reedline
+                .handle_event(&prompt, ReedlineEvent::Enter)
+                .unwrap();
+            reedline.handle_event(&prompt, ReedlineEvent::Up).unwrap();
+            reedline
+                .handle_event(&prompt, move_to_line_start_event)
+                .unwrap();
+            assert_eq!(reedline.editor.line_buffer().insertion_point(), 0);
         }
-        reedline
     }
 
-    #[rstest]
-    #[case("!!", true)]
-    #[case("\"echo !!", false)]
-    #[case("'echo !!", false)]
-    #[case("'echo' !!", true)]
-    #[case("\"echo !git", false)]
-    #[case("'echo !git", false)]
-    #[case("'Сегодня !!", false)]
-    #[case("'今日は !!", false)]
-    #[case("'🔥 !!", false)]
-    #[cfg(feature = "bashisms")]
-    fn bang_string_detection_with_override(#[case] buffer: &str, #[case] should_expand: bool) {
-        let mut reedline = reedline_with_history_and_string_lit_check(&["git status"]);
-        set_buffer_at_end(&mut reedline, buffer);
-        assert_eq!(reedline.parse_bang_command().is_some(), should_expand);
-    }
-
-    #[rstest]
-    #[case("\"echo !!")]
-    #[case("'echo !!")]
-    #[case("'echo' !!")]
-    #[case("\"echo !git")]
-    #[case("'echo !git")]
-    #[case("'Сегодня !!")]
-    #[case("'今日は !!")]
-    #[case("'🔥 !!")]
-    #[cfg(feature = "bashisms")]
-    fn bang_always_expands_without_override(#[case] buffer: &str) {
-        let mut reedline = reedline_with_history_default(&["git status"]);
-        set_buffer_at_end(&mut reedline, buffer);
-        assert!(
-            reedline.parse_bang_command().is_some(),
-            "must expand when highlighter does not override is_inside_string_literal"
-        );
+    #[test]
+    fn test_move_to_line_start_multiline() {
+        let cases = [
+            ("a\nb", 2, 2),
+            ("123456789\n123456789\n123456789", 10, 20),
+            ("0\n1\n2\n3\n4\n5\n6\n7\n8\n9", 2, 18),
+        ];
+
+        for (input, second_line_start, last_line_start) in cases {
+            let mut reedline = Reedline::create();
+            let prompt = DefaultPrompt::default();
+
+            let insert_input_event =
+                ReedlineEvent::Edit(vec![EditCommand::InsertString(input.to_string())]);
+            let move_to_line_start_event =
+                ReedlineEvent::Edit(vec![EditCommand::MoveToLineStart { select: false }]);
+            let move_to_end_event =
+                ReedlineEvent::Edit(vec![EditCommand::MoveToEnd { select: false }]);
+
+            // Have to resize, or painting.utils.estimate_single_line_wraps panics with divide-by-zero.
+            reedline
+                .handle_event(&prompt, ReedlineEvent::Resize(u16::MAX, u16::MAX))
+                .unwrap();
+
+            // Write the string, and then move to the start of the last line.
+            reedline.handle_event(&prompt, insert_input_event).unwrap();
+            reedline
+                .handle_event(&prompt, move_to_line_start_event.clone())
+                .unwrap();
+            assert_eq!(
+                reedline.editor.line_buffer().insertion_point(),
+                last_line_start
+            );
+
+            // Enter the string into history, then scroll back up and move to the start of the first line.
+            reedline
+                .handle_event(&prompt, ReedlineEvent::Enter)
+                .unwrap();
+            reedline.handle_event(&prompt, ReedlineEvent::Up).unwrap();
+            reedline
+                .handle_event(&prompt, move_to_line_start_event.clone())
+                .unwrap();
+            assert_eq!(reedline.editor.line_buffer().insertion_point(), 0);
+
+            // Enter the string again, then scroll up in history, move down one line,
+            // and move to the start of the second line.
+            reedline
+                .handle_event(&prompt, ReedlineEvent::Enter)
+                .unwrap();
+            reedline.handle_event(&prompt, ReedlineEvent::Up).unwrap();
+            reedline.handle_event(&prompt, ReedlineEvent::Down).unwrap();
+            reedline
+                .handle_event(&prompt, move_to_line_start_event.clone())
+                .unwrap();
+            assert_eq!(
+                reedline.editor.line_buffer().insertion_point(),
+                second_line_start
+            );
+
+            // Enter the string again, then scroll up in history, move to the end of the text,
+            // and move to the start of the last line.
+            reedline
+                .handle_event(&prompt, ReedlineEvent::Enter)
+                .unwrap();
+            reedline.handle_event(&prompt, ReedlineEvent::Up).unwrap();
+            reedline.handle_event(&prompt, move_to_end_event).unwrap();
+            reedline
+                .handle_event(&prompt, move_to_line_start_event)
+                .unwrap();
+            assert_eq!(
+                reedline.editor.line_buffer().insertion_point(),
+                last_line_start
+            );
+        }
+    }
+
+    #[test]
+    fn test_complete_line_from_history() {
+        let history = Box::new(FileBackedHistory::new(1).unwrap());
+        let completer = Box::new(DefaultCompleter::new(vec!["67".into()]));
+        let completion_menu = ReedlineMenu::EngineCompleter(Box::new(
+            ColumnarMenu::default().with_name("completion_menu"),
+        ));
+
+        let prompt = DefaultPrompt::default();
+        let mut reedline = Reedline::create()
+            .with_quick_completions(true)
+            .with_history(history)
+            .with_completer(completer)
+            .with_menu(completion_menu);
+
+        let insert_6 = ReedlineEvent::Edit(vec![EditCommand::InsertString("6".into())]);
+        let submit = ReedlineEvent::Submit;
+        let up = ReedlineEvent::Up;
+        let tab = ReedlineEvent::Menu("completion_menu".into());
+        let insert_x = ReedlineEvent::Edit(vec![EditCommand::InsertString("x".into())]);
+
+        // Insert 6, press enter, then re-select it from history.
+        // Press tab to automatically complete 67 using quick completion without actually showing the menu.
+        // Anything typed after this should be appended to the end of the string rather than replacing the completion.
+        // 67 + x should be 67x and not 6x
+
+        reedline.handle_event(&prompt, insert_6).unwrap();
+        reedline.handle_event(&prompt, submit).unwrap();
+        reedline.handle_event(&prompt, up).unwrap();
+        reedline.handle_event(&prompt, tab).unwrap();
+        reedline.handle_event(&prompt, insert_x).unwrap();
+
+        assert_eq!(reedline.editor.get_buffer(), "67x");
     }
 }