diff --git a/e2e/time.spec.ts b/e2e/time.spec.ts
index 0b5e23d3..f2dea6b1 100644
--- a/e2e/time.spec.ts
+++ b/e2e/time.spec.ts
@@ -1159,6 +1159,8 @@ test('test that end time picker works in create modal', async ({ page }) => {
     await endTimeInput.press('Tab');
 
     // Set duration (this will adjust based on the times)
+    // clear() before fill() needed because fill() appends on Firefox instead of replacing
+    await page.locator('[role="dialog"] input[name="Duration"]').clear();
     await page.locator('[role="dialog"] input[name="Duration"]').fill('1h');
     await page.locator('[role="dialog"] input[name="Duration"]').press('Tab');