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        <link:definition>053 - Disclosure - Note 12 - Segment Information (Details) - Segment Information Identifiable Assets &amp; Long Lived Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.intest.com/role/DocumentAndEntityInformation" id="DocumentAndEntityInformation">
        <link:definition>000 - Disclosure - Document And Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
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  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-types/2013-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2013/elts/us-types-2013-01-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
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  <xs:element name="PropertyAndEquipmentAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_PropertyAndEquipmentAbstract"/>
  <xs:element name="CurrentLiabilitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_CurrentLiabilitiesAbstract"/>
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  <xs:element name="CashFlowsFromOperatingActivitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_CashFlowsFromOperatingActivitiesAbstract"/>
  <xs:element name="AdjustmentsToReconcileNetEarningsToNetCashProvidedByOperatingActivitiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_AdjustmentsToReconcileNetEarningsToNetCashProvidedByOperatingActivitiesAbstract"/>
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  <xs:element name="CashPaymentsForAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_CashPaymentsForAbstract"/>
  <xs:element name="DetailsOfAcquisitionAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_DetailsOfAcquisitionAbstract"/>
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  <xs:element name="BasisOfPresentationAndUseOfEstimatesPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_BasisOfPresentationAndUseOfEstimatesPolicyTextBlock"/>
  <xs:element name="GoodwillIntangibleAndLongLivedAssetsPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_GoodwillIntangibleAndLongLivedAssetsPolicyTextBlock"/>
  <xs:element name="RestructuringAndOtherChargesPolicyTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_RestructuringAndOtherChargesPolicyTextBlock"/>
  <xs:element name="Note3AcquisitionTablesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="intt_Note3AcquisitionTablesTable"/>
  <xs:element name="Note3AcquisitionTablesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_Note3AcquisitionTablesLineItems"/>
  <xs:element name="ScheduleOfIntangibleAssetsTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_ScheduleOfIntangibleAssetsTableTextBlock"/>
  <xs:element name="IntangibleAssetsDomain" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_IntangibleAssetsDomain"/>
  <xs:element name="Note4GoodwillandIntangibleAssetsTablesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="intt_Note4GoodwillandIntangibleAssetsTablesTable"/>
  <xs:element name="Note4GoodwillandIntangibleAssetsTablesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_Note4GoodwillandIntangibleAssetsTablesLineItems"/>
  <xs:element name="ScheduleOfOutstandingLettersOfCreditTableTextBlock" type="nonnum:textBlockItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_ScheduleOfOutstandingLettersOfCreditTableTextBlock"/>
  <xs:element name="Note12SegmentInformationTablesTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="intt_Note12SegmentInformationTablesTable"/>
  <xs:element name="Note12SegmentInformationTablesLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_Note12SegmentInformationTablesLineItems"/>
  <xs:element name="WeightedAverageCommonSharesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_WeightedAverageCommonSharesAbstract"/>
  <xs:element name="PotentiallyDilutiveSecuritiesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_PotentiallyDilutiveSecuritiesAbstract"/>
  <xs:element name="AllocationOfThePurchasePriceAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_AllocationOfThePurchasePriceAbstract"/>
  <xs:element name="TangibleAssetsAcquiredAndLiabilitiesAssumedAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_TangibleAssetsAcquiredAndLiabilitiesAssumedAbstract"/>
  <xs:element name="FiniteLivedIntangibleAssetsAcquiredWithAcquisitionOfThermonicsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_FiniteLivedIntangibleAssetsAcquiredWithAcquisitionOfThermonicsAbstract"/>
  <xs:element name="IntangibleAssetsAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_IntangibleAssetsAbstract"/>
  <xs:element name="Note4GoodwillandIntangibleAssetsDetailsIntangibleAssetsTable" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrldt:hypercubeItem" id="intt_Note4GoodwillandIntangibleAssetsDetailsIntangibleAssetsTable"/>
  <xs:element name="Note4GoodwillandIntangibleAssetsDetailsIntangibleAssetsLineItems" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_Note4GoodwillandIntangibleAssetsDetailsIntangibleAssetsLineItems"/>
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  <xs:element name="FiniteLivedIntangibleAssetsAbstract0Alt0" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_FiniteLivedIntangibleAssetsAbstract0Alt0"/>
  <xs:element name="IndefiniteLivedIntangibleAssetsAbstract0" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_IndefiniteLivedIntangibleAssetsAbstract0"/>
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  <xs:element name="InventoriesAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_InventoriesAbstract"/>
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  <xs:element name="OriginalLetterOfCreditIssueDateDomain" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_OriginalLetterOfCreditIssueDateDomain"/>
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  <xs:element name="AccruedNonCompeteNonSolicitationPaymentsMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_AccruedNonCompeteNonSolicitationPaymentsMember"/>
  <xs:element name="ThermalProductsMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_ThermalProductsMember"/>
  <xs:element name="OriginalLCIssueDate3292010Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_OriginalLCIssueDate3292010Member"/>
  <xs:element name="LeaseExpirationDate4302021Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_LeaseExpirationDate4302021Member"/>
  <xs:element name="NetRevenuesFromUnaffiliatedCustomersMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_NetRevenuesFromUnaffiliatedCustomersMember"/>
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  <xs:element name="MechanicalProductsMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_MechanicalProductsMember"/>
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  <xs:element name="TemptronicFacilityMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_TemptronicFacilityMember"/>
  <xs:element name="LetterOfCreditExpirationDate3312014Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_LetterOfCreditExpirationDate3312014Member"/>
  <xs:element name="CustomerBacklogMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_CustomerBacklogMember"/>
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  <xs:element name="LeaseExpirationDate8232021Member" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_LeaseExpirationDate8232021Member"/>
  <xs:element name="SigmaMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_SigmaMember"/>
  <xs:element name="ElectricalProductsMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_ElectricalProductsMember"/>
  <xs:element name="FairValueMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_FairValueMember"/>
  <xs:element name="TexasInstrumentsIncorporatedMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_TexasInstrumentsIncorporatedMember"/>
  <xs:element name="TotalMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_TotalMember"/>
  <xs:element name="CarryingValueChangesMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_CarryingValueChangesMember"/>
  <xs:element name="MtLaurelMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_MtLaurelMember"/>
  <xs:element name="FacilityClosureCostsMember" type="nonnum:domainItemType" abstract="false" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_FacilityClosureCostsMember"/>
  <xs:element name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" abstract="true" xbrli:periodType="duration" nillable="true" substitutionGroup="xbrli:item" id="intt_DocumentAndEntityInformationAbstract"/>
</xs:schema>
