diff --git a/test/integration/builtin/filters/date.ts b/test/integration/builtin/filters/date.ts
index a7f7cdd8a..8353c9be8 100644
--- a/test/integration/builtin/filters/date.ts
+++ b/test/integration/builtin/filters/date.ts
@@ -23,19 +23,23 @@ describe('filters/date', function () {
   it('should render object as string if not valid', function () {
     return test('{{ obj | date: "%Y"}}', '[object Object]')
   })
-  it('should create from number-like string', async function () {
-    const src = '{{ "1488859200" | date: "%Y-%m-%dT%H:%M:%S" }}'
-    const dst = '2017-03-07T12:00:00'
-    expect(await liquid.parseAndRender(src)).to.equal(dst)
-  })
   it('should create from number', async function () {
-    const src = '{{ 1488859200 | date: "%Y-%m-%dT%H:%M:%S" }}'
+    const time = new Date('2017-03-07T12:00:00').getTime() / 1000
+    const src = '{{ time | date: "%Y-%m-%dT%H:%M:%S" }}'
+    const ctx = { time }
     const dst = '2017-03-07T12:00:00'
-    expect(await liquid.parseAndRender(src)).to.equal(dst)
+    expect(await liquid.parseAndRender(src, ctx)).to.equal(dst)
+  })
+  it('should create from number-like string', async function () {
+    const time = String(new Date('2017-03-07T12:00:00').getTime() / 1000)
+    const src = '{{ time | date: "%Y-%m-%dT%H:%M:%S" }}'
+    const ctx = { time }
+    const dst = '2017-03-07T12:00:00'
+    expect(await liquid.parseAndRender(src, ctx)).to.equal(dst)
   })
   it('should support manipulation', async function () {
     const src = '{{ date | date: "%s" | minus : 604800  | date: "%Y-%m-%dT%H:%M:%S"}}'
-    const ctx = { date: new Date('2017-03-07 12:00:00.000+8:00') }
+    const ctx = { date: new Date('2017-03-07T12:00:00') }
     const dst = '2017-02-28T12:00:00'
     expect(await liquid.parseAndRender(src, ctx)).to.equal(dst)
   })