diff --git a/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Heidenhain.Tests/HeidenhainLiveIntegrationTests.cs b/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Heidenhain.Tests/HeidenhainLiveIntegrationTests.cs
index 4ddff1680..46de2e751 100644
--- a/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Heidenhain.Tests/HeidenhainLiveIntegrationTests.cs
+++ b/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Heidenhain.Tests/HeidenhainLiveIntegrationTests.cs
@@ -86,6 +86,49 @@ public sealed class HeidenhainLiveIntegrationTests
         values[0].StatusCode.ShouldBe(HeidenhainStatus.Good);
     }
 
+    /// <summary>
+    ///     Derived String leaves (family classification, pyLSV2 state names, tool axis name) — no extra wire request;
+    ///     each is computed from a reply the session already reads.
+    /// </summary>
+    [Fact]
+    public async Task Real_control_derived_name_leaves()
+    {
+        Assert.SkipWhen(string.IsNullOrWhiteSpace(Host), "HEIDENHAIN_LSV2_HOST not set — real-controller gate skipped.");
+        var ct = TestContext.Current.CancellationToken;
+        var tags = new[]
+        {
+            TestTags.Raw("Controller/Model"), TestTags.Raw("Controller/Family"),
+            TestTags.Raw("Status/ExecutionState"), TestTags.Raw("Status/ExecutionStateName"),
+            TestTags.Raw("Status/ProgramState"), TestTags.Raw("Status/ProgramStateName"),
+            TestTags.Raw("Tool/AxisCode"), TestTags.Raw("Tool/AxisName"),
+        };
+        var options = new HeidenhainDriverOptions
+        {
+            Devices = [new HeidenhainDeviceOptions { Host = Host!, Port = Port, DeviceName = "dev1" }],
+            RawTags = tags,
+            Access = new HeidenhainAccessOptions { InspectPassword = Environment.GetEnvironmentVariable("OTOPCUA_HEIDENHAIN_INSPECT_PASSWORD") is { Length: > 0 } ? "env:OTOPCUA_HEIDENHAIN_INSPECT_PASSWORD" : null },
+        };
+        await using var driver = new HeidenhainDriver(options, "live");
+        await driver.InitializeAsync("{}", ct);
+        await driver.SubscribeAsync(tags.Select(t => t.RawPath).ToList(), TimeSpan.FromSeconds(1), ct);
+        var deadline = DateTime.UtcNow.AddSeconds(30);
+        IReadOnlyList<Core.Abstractions.DataValueSnapshot> values;
+        do
+        {
+            await Task.Delay(500, ct);
+            values = await driver.ReadAsync(tags.Select(t => t.RawPath).ToList(), ct);
+        } while ((values[1].StatusCode != HeidenhainStatus.Good || values[3].StatusCode != HeidenhainStatus.Good) && DateTime.UtcNow < deadline);
+
+        for (var i = 0; i < tags.Length; i++)
+            TestContext.Current.SendDiagnosticMessage($"{tags[i].RawPath} = {values[i].Value} (0x{values[i].StatusCode:X8})");
+        values[1].StatusCode.ShouldBe(HeidenhainStatus.Good);
+        values[1].Value.ShouldNotBe("Unknown");
+        values[3].StatusCode.ShouldBe(HeidenhainStatus.Good);
+        values[5].StatusCode.ShouldBe(HeidenhainStatus.Good);
+        // A name leaf never disagrees with its raw leaf's quality.
+        values[7].StatusCode.ShouldBe(values[6].StatusCode);
+    }
+
     /// <summary>#867: integer tool leaves must reach clients with their declared runtime type, not Double.</summary>
     [Fact]
     public async Task Real_control_tool_leaves_keep_integer_types()