diff --git a/src/Hosting/Systemd/src/SystemdHelpers.cs b/src/Hosting/Systemd/src/SystemdHelpers.cs
index c356c691b13..dbbe569f707 100644
--- a/src/Hosting/Systemd/src/SystemdHelpers.cs
+++ b/src/Hosting/Systemd/src/SystemdHelpers.cs
@@ -14,8 +14,6 @@ namespace Microsoft.Extensions.Hosting.Systemd
     /// </summary>
     public static class SystemdHelpers
     {
-        private const string INVOCATION_ID = "INVOCATION_ID";
-
         private static bool? _isSystemdService;
 
         /// <summary>
@@ -23,9 +21,9 @@ public static class SystemdHelpers
         /// </summary>
         /// <returns><c>True</c> if the current process is hosted as a systemd Service, otherwise <c>false</c>.</returns>
         public static bool IsSystemdService()
-            => _isSystemdService ?? (bool)(_isSystemdService = CheckSystemdUnit());
+            => _isSystemdService ?? (bool)(_isSystemdService = CheckParentIsSystemd());
 
-        private static bool CheckSystemdUnit()
+        private static bool CheckParentIsSystemd()
         {
             // No point in testing anything unless it's Unix
             if (Environment.OSVersion.Platform != PlatformID.Unix)
@@ -33,27 +31,11 @@ private static bool CheckSystemdUnit()
                 return false;
             }
 
-            // We've got invocation id, it's systemd >= 232 running a unit (either directly or through a child process)
-            if (!string.IsNullOrEmpty(Environment.GetEnvironmentVariable(INVOCATION_ID)))
-            {
-                return true;
-            }
-
-            // Either it's not a unit, or systemd is < 232, do a bit more digging
             try
             {
-                // Test parent process (this matches only direct parents, walking all the way up to the PID 1 is probably not what we would want)
+                // Check whether our direct parent is 'systemd'.
                 var parentPid = GetParentPid();
                 var ppidString = parentPid.ToString(NumberFormatInfo.InvariantInfo);
-
-                // If parent PID is not 1, this may be a user unit, in this case it must match MANAGERPID envvar
-                if (parentPid != 1
-                    && Environment.GetEnvironmentVariable("MANAGERPID") != ppidString)
-                {
-                    return false;
-                }
-
-                // Check parent process name to match "systemd\n"
                 var comm = File.ReadAllBytes("/proc/" + ppidString + "/comm");
                 return comm.AsSpan().SequenceEqual(Encoding.ASCII.GetBytes("systemd\n"));
             }