diff --git a/src/lib/readiness/platform-qualification.test.ts b/src/lib/readiness/platform-qualification.test.ts
index 4e5a6654922..d46d4078bd7 100644
--- a/src/lib/readiness/platform-qualification.test.ts
+++ b/src/lib/readiness/platform-qualification.test.ts
@@ -8,7 +8,11 @@ import {
   type PlatformQualificationInput,
   projectPlatformQualification,
 } from "./platform-qualification";
-import { isStationGb300PciDevice, isStationGb300ProductName } from "./station-qualification";
+import {
+  isStationGb300PciDevice,
+  isStationGb300ProductName,
+  STATION_RELEASE_MARKER_MAX_BYTES,
+} from "./station-qualification";
 
 function input(overrides: Partial<PlatformQualificationInput> = {}): PlatformQualificationInput {
   return {
@@ -410,6 +414,52 @@ describe("platform readiness qualification (#7410)", () => {
     });
   });
 
+  it("classifies an oversized DGX Station release marker as unqualified (#7877)", () => {
+    const identity = collectStationIdentity(
+      noOtaStationRelease(),
+      trustedMarkerStat({ size: STATION_RELEASE_MARKER_MAX_BYTES + 1 }),
+    );
+    const result = projectPlatformQualification(
+      input({
+        architecture: "arm64",
+        hasNvidiaGpu: true,
+        ...identity,
+      }),
+    );
+
+    expect(identity.stationProfile).toBe("unsupported-dgx-os");
+    expect(qualification(result, "host.platform.dgx_station")).toBe("unqualified");
+    expect(result.findings.map(({ id }) => id)).toContain("host.platform.dgx_station_unqualified");
+  });
+
+  it("classifies an unopenable DGX Station release marker as inconclusive (#7877)", () => {
+    const identity = collectPlatformIdentity({
+      productNamePath: "/fixtures/product_name",
+      osReleasePath: "/fixtures/os-release",
+      stationReleasePath: "/fixtures/dgx-release",
+      pciDevicesPath: "/fixtures/pci",
+      readFile: stationFixtureReadFile,
+      readdir: () => ["0000:01:00.0"],
+      openFile: () => {
+        throw Object.assign(new Error("release marker is a symbolic link"), { code: "ELOOP" });
+      },
+      statFileDescriptor: () => trustedMarkerStat(),
+      readFileDescriptor: () => noOtaStationRelease(),
+      closeFileDescriptor: () => undefined,
+    });
+    const result = projectPlatformQualification(
+      input({
+        architecture: "arm64",
+        hasNvidiaGpu: true,
+        ...identity,
+      }),
+    );
+
+    expect(identity.stationProfile).toBe("unknown");
+    expect(qualification(result, "host.platform.dgx_station")).toBe("unknown");
+    expect(result.findings.map(({ id }) => id)).toContain("host.platform.dgx_station_inconclusive");
+  });
+
   it("collects only bounded identity reads and never invokes host preparation", () => {
     const readFile = vi.fn(stationFixtureReadFile);
     const readdir = vi.fn(() => ["0000:01:00.0"]);