<?xml version='1.0' encoding='US-ASCII'?><schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:ust="http://ust/20260430" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:srt-types="http://fasb.org/srt-types/2025" xmlns:deprecated="http://www.xbrl.org/2009/role/deprecated" xmlns:dtr="http://www.xbrl.org/2009/dtr" xmlns:oef="http://xbrl.sec.gov/oef/2025" xmlns:ref="http://www.xbrl.org/2006/ref" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xl="http://www.xbrl.org/2003/XLink" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:oef-pre="http://xbrl.sec.gov/oef-pre/2025" xmlns:oef-lab="http://xbrl.sec.gov/oef-lab/2025" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:us-roles="http://fasb.org/us-roles/2025" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" xmlns:oef-def="http://xbrl.sec.gov/oef-def/2025" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:srt="http://fasb.org/srt/2025" xmlns:oef-sr="http://xbrl.sec.gov/oef-sr/2025" xmlns:srt-roles="http://fasb.org/srt-roles/2025" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrli="http://www.xbrl.org/2003/instance" targetNamespace="http://ust/20260430" elementFormDefault="qualified"><import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/><import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/><import namespace="http://xbrl.sec.gov/dei/2025" schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd"/><import namespace="http://fasb.org/us-types/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd"/><import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd"/><import namespace="http://xbrl.sec.gov/country/2025" schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd"/><import namespace="http://fasb.org/srt/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd"/><import namespace="http://fasb.org/srt-types/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-types-2025.xsd"/><import namespace="http://xbrl.sec.gov/oef-sr/2025" schemaLocation="https://xbrl.sec.gov/oef/2025/oef-sr-2025.xsd"/><import namespace="http://fasb.org/us-gaap/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd"/><import namespace="http://fasb.org/us-roles/2025" schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd"/><import namespace="http://fasb.org/srt-roles/2025" schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-roles-2025.xsd"/><annotation><appinfo><link:linkbase id="lnk"><link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/><link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReport" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReport"/><link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportHoldingsDetails"/><link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportLineGraphDetails"/><link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ShareholderReportAverageAnnualReturnDetails"/><link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/><link:roleRef roleURI="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#BroadBasedIndexOnly"/><link:roleRef roleURI="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#AdditionalIndexOnly"/><link:roleRef roleURI="http://xbrl.sec.gov/oef/role/IndustrySectorOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#IndustrySectorOnly"/><link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReport"><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/><link:loc xlink:type="locator" xlink:href="#ust_C000215611Member" xlink:label="C000215611Member"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000215611Member" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_C000215610Member" xlink:label="C000215610Member"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000215610Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/></link:presentationLink><link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails"><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/><link:loc xlink:type="locator" xlink:href="#ust_C000215611Member" xlink:label="C000215611Member"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000215611Member" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_C000215610Member" xlink:label="C000215610Member"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000215610Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="IndustrySectorDomain"/><link:loc xlink:type="locator" xlink:href="#ust_USTreasuryObligationsSectorMember" xlink:label="USTreasuryObligationsSectorMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="USTreasuryObligationsSectorMember" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_ExchangeMinusTradedFundsSectorMember" xlink:label="ExchangeMinusTradedFundsSectorMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="IndustrySectorDomain" xlink:to="ExchangeMinusTradedFundsSectorMember" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/></link:presentationLink><link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportLineGraphDetails"><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/><link:loc xlink:type="locator" xlink:href="#ust_C000215611Member" xlink:label="C000215611Member"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000215611Member" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_C000215610Member" xlink:label="C000215610Member"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000215610Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BroadBasedIndexDomain" xlink:label="BroadBasedIndexDomain"/><link:loc xlink:type="locator" xlink:href="#ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" xlink:label="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" xlink:label="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1"/><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/><link:loc xlink:type="locator" xlink:href="#ust_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" xlink:label="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" xlink:label="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1"/></link:presentationLink><link:presentationLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ShareholderReportAverageAnnualReturnDetails"><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/><link:loc xlink:type="locator" xlink:href="#ust_C000215611Member" xlink:label="C000215611Member"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000215611Member" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_C000215610Member" xlink:label="C000215610Member"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ShareClassDomain" xlink:to="C000215610Member" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/label" priority="1"/><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BroadBasedIndexDomain" xlink:label="BroadBasedIndexDomain"/><link:loc xlink:type="locator" xlink:href="#ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" xlink:label="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" xlink:label="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1"/><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/><link:loc xlink:type="locator" xlink:href="#ust_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" xlink:label="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" order="1.0" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" xlink:label="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember"/><link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="AdditionalIndexDomain" xlink:to="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" order="2.0" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" priority="1"/></link:presentationLink><link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly"><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/><link:loc xlink:type="locator" xlink:href="#ust_C000215611Member" xlink:label="C000215611Member"/><link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000215611Member" order="1.0" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_C000215610Member" xlink:label="C000215610Member"/><link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="C000215610Member" order="2.0" priority="1"/></link:definitionLink><link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/BroadBasedIndexOnly"><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_BroadBasedIndexDomain" xlink:label="BroadBasedIndexDomain"/><link:loc xlink:type="locator" xlink:href="#ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" xlink:label="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember"/><link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" order="1.0" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" xlink:label="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember"/><link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="BroadBasedIndexDomain" xlink:to="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" order="2.0" priority="1"/></link:definitionLink><link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/AdditionalIndexOnly"><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AdditionalIndexDomain" xlink:label="AdditionalIndexDomain"/><link:loc xlink:type="locator" xlink:href="#ust_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" xlink:label="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember"/><link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" order="1.0" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" xlink:label="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember"/><link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AdditionalIndexDomain" xlink:to="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" order="2.0" priority="1"/></link:definitionLink><link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/IndustrySectorOnly"><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_IndustrySectorDomain" xlink:label="IndustrySectorDomain"/><link:loc xlink:type="locator" xlink:href="#ust_USTreasuryObligationsSectorMember" xlink:label="USTreasuryObligationsSectorMember"/><link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IndustrySectorDomain" xlink:to="USTreasuryObligationsSectorMember" order="1.0" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_ExchangeMinusTradedFundsSectorMember" xlink:label="ExchangeMinusTradedFundsSectorMember"/><link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="IndustrySectorDomain" xlink:to="ExchangeMinusTradedFundsSectorMember" order="2.0" priority="1"/></link:definitionLink><link:labelLink xlink:type="extended" xlink:role="http://www.xbrl.org/2003/role/link"><link:loc xlink:type="locator" xlink:href="#ust_C000215611Member" xlink:label="C000215611Member"/><link:label xlink:type="resource" xlink:label="label_C000215611Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000215611</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000215611Member" xlink:to="label_C000215611Member" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_C000215610Member" xlink:label="C000215610Member"/><link:label xlink:type="resource" xlink:label="label_C000215610Member" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">C000215610</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="C000215610Member" xlink:to="label_C000215610Member" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" xlink:label="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember"/><link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Bloomberg Global Aggregate Total Return Index Value Hedged USD</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" xlink:to="label_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" priority="1"/><link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember_1432" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg Global Aggregate Total Return Index Value Hedged USD_1432</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" xlink:to="label_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember_1432" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" xlink:label="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember"/><link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">Bloomberg Global Aggregate Total Return Index Value Hedged USD</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" xlink:to="label_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" priority="1"/><link:label xlink:type="resource" xlink:label="label_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember_1433" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Bloomberg Global Aggregate Total Return Index Value Hedged USD_1433</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" xlink:to="label_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember_1433" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" xlink:label="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember"/><link:label xlink:type="resource" xlink:label="label_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">ICE BofA US Treasury Bill Index (USD) TR</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" xlink:to="label_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" priority="1"/><link:label xlink:type="resource" xlink:label="label_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember_1432" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">ICE BofA US Treasury Bill Index (USD) TR_1432</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" xlink:to="label_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember_1432" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" xlink:label="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember"/><link:label xlink:type="resource" xlink:label="label_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xml:lang="en-US">ICE BofA US Treasury Bill Index (USD) TR</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" xlink:to="label_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" priority="1"/><link:label xlink:type="resource" xlink:label="label_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember_1433" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">ICE BofA US Treasury Bill Index (USD) TR_1433</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" xlink:to="label_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember_1433" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_USTreasuryObligationsSectorMember" xlink:label="USTreasuryObligationsSectorMember"/><link:label xlink:type="resource" xlink:label="label_USTreasuryObligationsSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">U.S. Treasury Obligations</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="USTreasuryObligationsSectorMember" xlink:to="label_USTreasuryObligationsSectorMember" priority="1"/><link:loc xlink:type="locator" xlink:href="#ust_ExchangeMinusTradedFundsSectorMember" xlink:label="ExchangeMinusTradedFundsSectorMember"/><link:label xlink:type="resource" xlink:label="label_ExchangeMinusTradedFundsSectorMember" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">Exchange-Traded Funds</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ExchangeMinusTradedFundsSectorMember" xlink:to="label_ExchangeMinusTradedFundsSectorMember" priority="1"/><link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_NoTradingSymbolFlag" xlink:label="NoTradingSymbolFlag"/><link:label xlink:type="resource" xlink:label="label_NoTradingSymbolFlag" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">No Trading Symbol [Flag]</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="NoTradingSymbolFlag" xlink:to="label_NoTradingSymbolFlag" priority="1"/><link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="AssetsNet"/><link:label xlink:type="resource" xlink:label="label_AssetsNet" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">AssetsNet</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="AssetsNet" xlink:to="label_AssetsNet" priority="1"/><link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyPortfolioTurnover" xlink:label="InvestmentCompanyPortfolioTurnover"/><link:label xlink:type="resource" xlink:label="label_InvestmentCompanyPortfolioTurnover" xlink:role="http://www.xbrl.org/2003/role/label" xml:lang="en-US">InvestmentCompanyPortfolioTurnover</link:label><link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="InvestmentCompanyPortfolioTurnover" xlink:to="label_InvestmentCompanyPortfolioTurnover" priority="1"/></link:labelLink></link:linkbase></appinfo></annotation><element name="C000215611Member" id="ust_C000215611Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/><element name="C000215610Member" id="ust_C000215610Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/><element name="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" id="ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1432BroadBasedIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/><element name="BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" id="ust_BloombergGlobalAggregateTotalReturnIndexValueHedgedUSD1433BroadBasedIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/><element name="ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" id="ust_ICEBofAUSTreasuryBillIndexUSDTR1432AdditionalIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/><element name="ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" id="ust_ICEBofAUSTreasuryBillIndexUSDTR1433AdditionalIndexMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/><element name="USTreasuryObligationsSectorMember" id="ust_USTreasuryObligationsSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/><element name="ExchangeMinusTradedFundsSectorMember" id="ust_ExchangeMinusTradedFundsSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/></schema>
