diff --git a/bun.lock b/bun.lock
index 43550fc..5b79f49 100644
--- a/bun.lock
+++ b/bun.lock
@@ -1,6 +1,5 @@
 {
   "lockfileVersion": 1,
-  "configVersion": 0,
   "workspaces": {
     "": {
       "dependencies": {
diff --git a/tests/api.test.ts b/tests/api.test.ts
new file mode 100644
index 0000000..be7d033
--- /dev/null
+++ b/tests/api.test.ts
@@ -0,0 +1,31 @@
+import { describe, expect, test, mock, afterEach, beforeEach, spyOn } from 'bun:test';
+import fs from 'fs';
+import { loadSession } from '../src/api';
+
+describe('api.ts loadSession', () => {
+  let originalConsoleError: any;
+  let existsSyncSpy: any;
+  let readFileSyncSpy: any;
+
+  beforeEach(() => {
+    originalConsoleError = console.error;
+    console.error = mock(() => {});
+
+    // Use spyOn to mock specific fs methods
+    existsSyncSpy = spyOn(fs, 'existsSync').mockReturnValue(true);
+    readFileSyncSpy = spyOn(fs, 'readFileSync').mockReturnValue('{ "invalid": json ');
+  });
+
+  afterEach(() => {
+    console.error = originalConsoleError;
+    existsSyncSpy.mockRestore();
+    readFileSyncSpy.mockRestore();
+  });
+
+  test('loadSession throws error on JSON parse failure', async () => {
+    // Assert that the Promise rejects with a SyntaxError (JSON parse error)
+    await expect(loadSession()).rejects.toThrow(SyntaxError);
+    // Verify that console.error was called
+    expect(console.error).toHaveBeenCalled();
+  });
+});