diff --git a/packages/playwright/src/program.ts b/packages/playwright/src/program.ts
index d494602dc8..071b07dd45 100644
--- a/packages/playwright/src/program.ts
+++ b/packages/playwright/src/program.ts
@@ -158,6 +158,9 @@ async function runTests(args: string[], opts: { [key: string]: any }) {
   const cliOverrides = overridesFromOptions(opts);
 
   if (opts.ui || opts.uiHost || opts.uiPort) {
+    if (opts.onlyChanged)
+      throw new Error('--only-changed is not supported in UI mode');
+
     const status = await testServer.runUIMode(opts.config, {
       host: opts.uiHost,
       port: opts.uiPort ? +opts.uiPort : undefined,
diff --git a/tests/playwright-test/only-changed.spec.ts b/tests/playwright-test/only-changed.spec.ts
index 4d1e71749b..aa27dc7e46 100644
--- a/tests/playwright-test/only-changed.spec.ts
+++ b/tests/playwright-test/only-changed.spec.ts
@@ -243,4 +243,8 @@ test.describe('should work the same if being called in subdirectory', () => {
   });
 });
 
-
+test('UI mode is not supported', async ({ runInlineTest }) => {
+  const result = await runInlineTest({}, { 'only-changed': true, 'ui': true });
+  expect(result.exitCode).toBe(1);
+  expect(result.output).toContain('--only-changed is not supported in UI mode');
+});
\ No newline at end of file