diff --git a/src/formatInTimeZone/test.js b/src/formatInTimeZone/test.js
index 988be3b..bc28b25 100644
--- a/src/formatInTimeZone/test.js
+++ b/src/formatInTimeZone/test.js
@@ -2,11 +2,44 @@ import assert from 'power-assert'
 import formatInTimeZone from './index'
 
 describe('formatInTimeZone', function () {
-  it('shifts the date to the zoned time and formats', function () {
+  describe('shifts the date to the zoned time and formats', function () {
     var date = '1986-04-04T10:32:55.123Z'
-    var timeZone = 'Europe/Paris'
-    var result = formatInTimeZone(date, timeZone, "dd.MM.yyyy HH:mm 'UTC'xxx")
-    assert(result === '04.04.1986 12:32 UTC+02:00')
+    var tests = [
+      {
+        expected: '04.04.1986 12:32 UTC+02:00',
+        format: "dd.MM.yyyy HH:mm 'UTC'xxx",
+        formatType: 'offset',
+        timeZoneType: 'name',
+        timeZone: 'Europe/Paris',
+      },
+      {
+        expected: '04.04.1986 12:32 UTC+02:00',
+        format: "dd.MM.yyyy HH:mm 'UTC'xxx",
+        formatType: 'offset',
+        timeZoneType: 'offset',
+        timeZone: '+02:00',
+      },
+      {
+        expected: '04.04.1986 12:32 Central European Summer Time',
+        format: 'dd.MM.yyyy HH:mm zzzz',
+        formatType: 'name',
+        timeZoneType: 'name',
+        timeZone: 'Europe/Paris',
+      },
+      {
+        expected: '04.04.1986 12:32 Central European Summer Time',
+        format: 'dd.MM.yyyy HH:mm zzzz',
+        formatType: 'name',
+        timeZoneType: 'offset',
+        timeZone: '+02:00',
+      },
+    ]
+
+    tests.forEach(function (test) {
+      it(`format type: ${test.formatType}, time zone type: ${test.timeZoneType}`, function () {
+        assert(formatInTimeZone(date, test.timeZone, test.format) === test.expected)
+      })
+    })
   })
 
   it('throws a RangeError on invalid time zones', function () {