--- a/widget/windows/GfxInfo.cpp
+++ b/widget/windows/GfxInfo.cpp
@@ -1228,17 +1228,17 @@ GfxInfo::GetFeatureStatusImpl(int32_t aF
         // FIXME - these special hex values are currently used in xpcshell tests introduced by
         // bug 625160 patch 8/8. Maybe these tests need to be adjusted now that we're only whitelisting
         // intel/ati/nvidia.
         !adapterVendorID.LowerCaseEqualsLiteral("0xabcd") &&
         !adapterVendorID.LowerCaseEqualsLiteral("0xdcba") &&
         !adapterVendorID.LowerCaseEqualsLiteral("0xabab") &&
         !adapterVendorID.LowerCaseEqualsLiteral("0xdcdc"))
     {
-      aFailureId = "FEATURE_FAILURE_TEST";
+      aFailureId = "FEATURE_FAILURE_UNKNOWN_DEVICE_VENDOR";
       *aStatus = FEATURE_BLOCKED_DEVICE;
       return NS_OK;
     }
 
     uint64_t driverVersion;
     if (!ParseDriverVersion(adapterDriverVersionString, &driverVersion)) {
       aFailureId = "FEATURE_FAILURE_PARSE_DRIVER";
       *aStatus = FEATURE_BLOCKED_DRIVER_VERSION;