diff --git a/crates/editor/src/editor.rs b/crates/editor/src/editor.rs
index ff34fea917fbd..0facf0d79115c 100644
--- a/crates/editor/src/editor.rs
+++ b/crates/editor/src/editor.rs
@@ -4653,7 +4653,13 @@ impl Editor {
     }
 
     pub fn convert_to_title_case(&mut self, _: &ConvertToTitleCase, cx: &mut ViewContext<Self>) {
-        self.manipulate_text(cx, |text| text.to_case(Case::Title))
+        self.manipulate_text(cx, |text| {
+            // Hack to get around the fact that to_case crate doesn't support '\n' as a word boundary
+            // https://github.com/rutrum/convert-case/issues/16
+            text.split("\n")
+                .map(|line| line.to_case(Case::Title))
+                .join("\n")
+        })
     }
 
     pub fn convert_to_snake_case(&mut self, _: &ConvertToSnakeCase, cx: &mut ViewContext<Self>) {
@@ -4669,7 +4675,13 @@ impl Editor {
         _: &ConvertToUpperCamelCase,
         cx: &mut ViewContext<Self>,
     ) {
-        self.manipulate_text(cx, |text| text.to_case(Case::UpperCamel))
+        self.manipulate_text(cx, |text| {
+            // Hack to get around the fact that to_case crate doesn't support '\n' as a word boundary
+            // https://github.com/rutrum/convert-case/issues/16
+            text.split("\n")
+                .map(|line| line.to_case(Case::UpperCamel))
+                .join("\n")
+        })
     }
 
     pub fn convert_to_lower_camel_case(
diff --git a/crates/editor/src/editor_tests.rs b/crates/editor/src/editor_tests.rs
index 72df7b7874107..dee27e0121256 100644
--- a/crates/editor/src/editor_tests.rs
+++ b/crates/editor/src/editor_tests.rs
@@ -2792,6 +2792,34 @@ async fn test_manipulate_text(cx: &mut TestAppContext) {
         «hello worldˇ»
     "});
 
+    // Test multiple line, single selection case
+    // Test code hack that covers the fact that to_case crate doesn't support '\n' as a word boundary
+    cx.set_state(indoc! {"
+        «The quick brown
+        fox jumps over
+        the lazy dogˇ»
+    "});
+    cx.update_editor(|e, cx| e.convert_to_title_case(&ConvertToTitleCase, cx));
+    cx.assert_editor_state(indoc! {"
+        «The Quick Brown
+        Fox Jumps Over
+        The Lazy Dogˇ»
+    "});
+
+    // Test multiple line, single selection case
+    // Test code hack that covers the fact that to_case crate doesn't support '\n' as a word boundary
+    cx.set_state(indoc! {"
+        «The quick brown
+        fox jumps over
+        the lazy dogˇ»
+    "});
+    cx.update_editor(|e, cx| e.convert_to_upper_camel_case(&ConvertToUpperCamelCase, cx));
+    cx.assert_editor_state(indoc! {"
+        «TheQuickBrown
+        FoxJumpsOver
+        TheLazyDogˇ»
+    "});
+
     // From here on out, test more complex cases of manipulate_text()
 
     // Test no selection case - should affect words cursors are in