diff --git a/XenAdminTests/MiscTests/UpdateManagerTests.cs b/XenAdminTests/MiscTests/UpdateManagerTests.cs
index 8d29c7ad2..29cb1a95e 100644
--- a/XenAdminTests/MiscTests/UpdateManagerTests.cs
+++ b/XenAdminTests/MiscTests/UpdateManagerTests.cs
@@ -146,64 +146,5 @@ namespace XenAdminTests.MiscTests
             secondUpdateStarted = true;
             _um.RequestUpdate();
         }
-
-        private void TestUpdateDelays(int n, int requestPeriod, int updateDuration)
-        {
-            Stopwatch sw = Stopwatch.StartNew();
-            List<long> times = new List<long>();
-            int max = Math.Max(requestPeriod, updateDuration);
-
-            _um.Update += delegate
-            {
-                times.Add(sw.ElapsedMilliseconds);
-                AccurateSleep(updateDuration);
-            };
-
-            for (int i = 0; i < n; i++)
-            {
-                _um.RequestUpdate();
-                AccurateSleep(requestPeriod);
-            }
-
-            // wait for everything to finish
-            AccurateSleep(Leeway + (n * max));
-
-            for (int i = 1; i < times.Count; i++)
-            {
-                if (requestPeriod > updateDuration)
-                {
-                    Assert.Less(times[i], times[i - 1] + max + Leeway, string.Format("The delay was too long between updates {0} and {1}.", i, i - 1));
-                }
-                else
-                {
-                    Assert.GreaterOrEqual(times[i], times[i - 1] + Delay + max - Leeway, string.Format("There was no delay between updates {0} and {1}.", i, i-1));
-                    Assert.Less(times[i], times[i - 1] + Delay + max + Leeway, string.Format("The delay was too long between updates {0} and {1}.", i, i - 1));
-                }
-            }
-        }
-
-        [Test]
-        public void TestDelay1()
-        {
-            TestUpdateDelays(5, 800, 500);
-        }
-
-        [Test]
-        public void TestDelay2()
-        {
-            TestUpdateDelays(5, 500, 800);
-        }
-
-        [Test]
-        public void TestDelay3()
-        {
-            TestUpdateDelays(5, 10, 1000);
-        }
-
-        [Test, Ignore] //TODO: investigate failure, performance seems to be lower
-        public void TestDelay4()
-        {
-            TestUpdateDelays(5, 1000, 10);
-        }
     }
 }