diff --git a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/StartSleepCommand.cs b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/StartSleepCommand.cs
index b99476917..43840141e 100644
--- a/src/Microsoft.PowerShell.Commands.Utility/commands/utility/StartSleepCommand.cs
+++ b/src/Microsoft.PowerShell.Commands.Utility/commands/utility/StartSleepCommand.cs
@@ -43,8 +43,8 @@ namespace Microsoft.PowerShell.Commands
         /// </summary>
         [Parameter(Position = 0, Mandatory = true, ParameterSetName = "Seconds", ValueFromPipeline = true,
                    ValueFromPipelineByPropertyName = true)]
-        [ValidateRangeAttribute(0, int.MaxValue / 1000)]
-        public int Seconds { get; set; }
+        [ValidateRangeAttribute(0.0, (double)(int.MaxValue / 1000))]
+        public double Seconds { get; set; }
 
         /// <summary>
         /// Allows sleep time to be specified in milliseconds.
@@ -97,7 +97,7 @@ namespace Microsoft.PowerShell.Commands
             switch (ParameterSetName)
             {
                 case "Seconds":
-                    sleepTime = Seconds * 1000;
+                    sleepTime = (int)(Seconds * 1000);
                     break;
 
                 case "Milliseconds":
diff --git a/test/powershell/Modules/Microsoft.PowerShell.Utility/Start-Sleep.Tests.ps1 b/test/powershell/Modules/Microsoft.PowerShell.Utility/Start-Sleep.Tests.ps1
index b0d398340..19a27e7c5 100644
--- a/test/powershell/Modules/Microsoft.PowerShell.Utility/Start-Sleep.Tests.ps1
+++ b/test/powershell/Modules/Microsoft.PowerShell.Utility/Start-Sleep.Tests.ps1
@@ -3,14 +3,13 @@
 Describe "Start-Sleep DRT Unit Tests" -Tags "CI" {
 
     # WaitHandle.WaitOne(milliseconds, exitContext) is not accurate.
-    # The wait time varies from 980ms to 1150ms from observation, so
-    # the tests here are changed to be greater than 950ms.
-    $minTime = 950
-    $maxTime = 1200
+    # The actual wait time can vary from 1450ms to 1700ms.
+    $minTime = 1450
+    $maxTime = 1700
 
     It "Should work properly when sleeping with Second" {
         $watch = [System.Diagnostics.Stopwatch]::StartNew()
-        Start-Sleep -Seconds 1
+        Start-Sleep -Seconds 1.5
         $watch.Stop()
         $watch.ElapsedMilliseconds | Should -BeGreaterThan $minTime
         $watch.ElapsedMilliseconds | Should -BeLessThan $maxTime
@@ -18,7 +17,7 @@ Describe "Start-Sleep DRT Unit Tests" -Tags "CI" {
 
     It "Should work properly when sleeping with Milliseconds" {
         $watch = [System.Diagnostics.Stopwatch]::StartNew()
-        Start-Sleep -Milliseconds 1000
+        Start-Sleep -Milliseconds 1500
         $watch.Stop()
         $watch.ElapsedMilliseconds | Should -BeGreaterThan $minTime
         $watch.ElapsedMilliseconds | Should -BeLessThan $maxTime
@@ -26,7 +25,15 @@ Describe "Start-Sleep DRT Unit Tests" -Tags "CI" {
 
     It "Should work properly when sleeping with ms alias" {
         $watch = [System.Diagnostics.Stopwatch]::StartNew()
-        Start-Sleep -ms 1000
+        Start-Sleep -ms 1500
+        $watch.Stop()
+        $watch.ElapsedMilliseconds | Should -BeGreaterThan $minTime
+        $watch.ElapsedMilliseconds | Should -BeLessThan $maxTime
+    }
+
+    It "Should work properly when sleeping without parameters" {
+        $watch = [System.Diagnostics.Stopwatch]::StartNew()
+        Start-Sleep 1.5
         $watch.Stop()
         $watch.ElapsedMilliseconds | Should -BeGreaterThan $minTime
         $watch.ElapsedMilliseconds | Should -BeLessThan $maxTime
@@ -34,11 +41,10 @@ Describe "Start-Sleep DRT Unit Tests" -Tags "CI" {
 }
 
 Describe "Start-Sleep" -Tags "CI" {
-
     Context "Validate Start-Sleep works properly" {
-	It "Should only sleep for at least 1 second" {
-	    $result = Measure-Command { Start-Sleep -s 1 }
-	    $result.TotalSeconds | Should -BeGreaterThan 0.25
-	}
+        It "Should only sleep for at least 1 second" {
+            $result = Measure-Command { Start-Sleep -s 1 }
+            $result.TotalSeconds | Should -BeGreaterThan 0.25
+        }
     }
 }