diff --git a/crates/oxc_language_server/src/linter/isolated_lint_handler.rs b/crates/oxc_language_server/src/linter/isolated_lint_handler.rs
index f00dde8ee3395..f682596ceae35 100644
--- a/crates/oxc_language_server/src/linter/isolated_lint_handler.rs
+++ b/crates/oxc_language_server/src/linter/isolated_lint_handler.rs
@@ -125,7 +125,7 @@ impl IsolatedLintHandler {
 
         let mut messages: Vec<DiagnosticReport> = self
             .runner
-            .run_source(&Arc::from(path.as_os_str()), source_text.to_string(), &fs)
+            .run_source(&Arc::from(path.as_os_str()), &fs)
             .into_iter()
             .map(|message| message_to_lsp_diagnostic(message, uri, source_text, rope))
             .collect();
diff --git a/crates/oxc_linter/src/lint_runner.rs b/crates/oxc_linter/src/lint_runner.rs
index 7eee7b218e0d5..5379059131e99 100644
--- a/crates/oxc_linter/src/lint_runner.rs
+++ b/crates/oxc_linter/src/lint_runner.rs
@@ -236,14 +236,13 @@ impl LintRunner {
     pub fn run_source(
         &self,
         file: &Arc<OsStr>,
-        source_text: String,
         file_system: &(dyn crate::RuntimeFileSystem + Sync + Send),
     ) -> Vec<Message> {
         let mut messages = self.lint_service.run_source(file_system, vec![Arc::clone(file)]);
 
         if let Some(type_aware_linter) = &self.type_aware_linter {
             let tsgo_messages =
-                match type_aware_linter.lint_source(file, source_text, self.directives_store.map())
+                match type_aware_linter.lint_source(file, file_system, self.directives_store.map())
                 {
                     Ok(msgs) => msgs,
                     Err(err) => {
diff --git a/crates/oxc_linter/src/tsgolint.rs b/crates/oxc_linter/src/tsgolint.rs
index 89a4e4a885b01..330a768637b77 100644
--- a/crates/oxc_linter/src/tsgolint.rs
+++ b/crates/oxc_linter/src/tsgolint.rs
@@ -6,6 +6,7 @@ use std::{
     sync::{Arc, Mutex},
 };
 
+use oxc_allocator::Allocator;
 use rustc_hash::FxHashMap;
 use serde::{Deserialize, Serialize};
 
@@ -320,12 +321,20 @@ impl TsGoLintState {
     pub fn lint_source(
         &self,
         path: &Arc<OsStr>,
-        source_text: String,
+        file_system: &(dyn crate::RuntimeFileSystem + Sync + Send),
         disable_directives_map: Arc<Mutex<FxHashMap<PathBuf, DisableDirectives>>>,
     ) -> Result<Vec<Message>, String> {
         let mut resolved_configs: FxHashMap<PathBuf, ResolvedLinterState> = FxHashMap::default();
         let mut source_overrides = FxHashMap::default();
-        source_overrides.insert(path.to_string_lossy().to_string(), source_text.clone());
+        let allocator = Allocator::default();
+        let Ok(source_text) = file_system.read_to_arena_str(Path::new(path.as_ref()), &allocator)
+        else {
+            return Err(format!("Failed to read source text for file: {}", path.to_string_lossy()));
+        };
+
+        // Clone source_text to own it for the spawned thread
+        let source_text_owned = source_text.to_string();
+        source_overrides.insert(path.to_string_lossy().to_string(), source_text_owned.clone());
 
         let json_input = self.json_input(
             std::slice::from_ref(path),
@@ -383,7 +392,7 @@ impl TsGoLintState {
 
                                     let mut message = Message::from_tsgo_lint_diagnostic(
                                         tsgolint_diagnostic,
-                                        &source_text,
+                                        &source_text_owned,
                                     );
 
                                     message.error.severity = if severity == AllowWarnDeny::Deny {