diff --git a/test/api/InputHandler.api.ts b/test/api/InputHandler.api.ts
index cbf5dbd6..d9c9bf89 100644
--- a/test/api/InputHandler.api.ts
+++ b/test/api/InputHandler.api.ts
@@ -309,6 +309,23 @@ describe('InputHandler Integration Tests', function(): void {
       });
     });
   });
+
+  describe('addCsiHandler', () => {
+    it('should call custom CSI handler with js array params', async () => {
+      await page.evaluate(`
+        window.term.reset();
+        const _customCsiHandlerParams = [];
+        const _customCsiHandler = window.term.addCsiHandler('m', (params, collect) => {
+          _customCsiHandlerParams.push(params);
+          return false;
+        }, '');
+      `);
+      await page.evaluate(`
+        window.term.write('\x1b[38;5;123mparams\x1b[38:2::50:100:150msubparams');
+      `);
+      assert.deepEqual(await page.evaluate(`(() => _customCsiHandlerParams)();`), [[38, 5, 123], [38, [2, -1, 50, 100, 150]]]);
+    });
+  });
 });
 
 async function openTerminal(options: ITerminalOptions = {}): Promise<void> {