diff --git a/phpunit.xml b/phpunit.xml
index 98f9b9722..7d52b9dd5 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="tests/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xml"
          cacheResult="false"
          colors="true"
          failOnRisky="true"
diff --git a/tests/phpunit.xsd b/tests/phpunit.xsd
deleted file mode 100644
index 98af235c8..000000000
--- a/tests/phpunit.xsd
+++ /dev/null
@@ -1,328 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
-	<xs:annotation>
-		<xs:documentation source="https://phpunit.de/documentation.html">
-			This Schema file defines the rules by which the XML configuration file of PHPUnit 9.5 may be structured.
-		</xs:documentation>
-		<xs:appinfo source="https://phpunit.de/documentation.html"/>
-	</xs:annotation>
-	<xs:element name="phpunit" type="phpUnitType">
-		<xs:annotation>
-			<xs:documentation>Root Element</xs:documentation>
-		</xs:annotation>
-	</xs:element>
-	<xs:complexType name="coverageType">
-		<xs:all>
-			<xs:element name="include" minOccurs="0" maxOccurs="1">
-				<xs:complexType>
-					<xs:group ref="pathGroup"/>
-				</xs:complexType>
-			</xs:element>
-			<xs:element name="exclude" minOccurs="0" maxOccurs="1">
-				<xs:complexType>
-					<xs:group ref="pathGroup"/>
-				</xs:complexType>
-			</xs:element>
-			<xs:element name="report" minOccurs="0" maxOccurs="1">
-				<xs:complexType>
-					<xs:group ref="coverageReportGroup"/>
-				</xs:complexType>
-			</xs:element>
-		</xs:all>
-		<xs:attribute name="cacheDirectory" type="xs:anyURI"/>
-		<xs:attribute name="pathCoverage" type="xs:boolean" default="false"/>
-		<xs:attribute name="includeUncoveredFiles" type="xs:boolean" default="true"/>
-		<xs:attribute name="processUncoveredFiles" type="xs:boolean" default="false"/>
-		<xs:attribute name="ignoreDeprecatedCodeUnits" type="xs:boolean" default="false"/>
-		<xs:attribute name="disableCodeCoverageIgnore" type="xs:boolean" default="false"/>
-	</xs:complexType>
-	<xs:complexType name="loggingType">
-		<xs:group ref="loggingGroup"/>
-	</xs:complexType>
-	<xs:complexType name="groupsType">
-		<xs:choice>
-			<xs:sequence>
-				<xs:element name="include" type="groupType"/>
-				<xs:element name="exclude" type="groupType" minOccurs="0"/>
-			</xs:sequence>
-			<xs:sequence>
-				<xs:element name="exclude" type="groupType"/>
-			</xs:sequence>
-		</xs:choice>
-	</xs:complexType>
-	<xs:complexType name="groupType">
-		<xs:sequence>
-			<xs:element name="group" type="xs:string" maxOccurs="unbounded"/>
-		</xs:sequence>
-	</xs:complexType>
-	<xs:complexType name="extensionsType">
-		<xs:sequence>
-			<xs:element name="extension" type="objectType" maxOccurs="unbounded"/>
-		</xs:sequence>
-	</xs:complexType>
-	<xs:complexType name="listenersType">
-		<xs:sequence>
-			<xs:element name="listener" type="objectType" maxOccurs="unbounded"/>
-		</xs:sequence>
-	</xs:complexType>
-	<xs:complexType name="objectType">
-		<xs:sequence>
-			<xs:element name="arguments" minOccurs="0">
-				<xs:complexType>
-					<xs:group ref="argumentsGroup"/>
-				</xs:complexType>
-			</xs:element>
-		</xs:sequence>
-		<xs:attribute name="class" type="xs:string" use="required"/>
-		<xs:attribute name="file" type="xs:anyURI"/>
-	</xs:complexType>
-	<xs:complexType name="arrayType">
-		<xs:sequence>
-			<xs:element name="element" type="argumentType" minOccurs="0" maxOccurs="unbounded"/>
-		</xs:sequence>
-	</xs:complexType>
-	<xs:complexType name="argumentType">
-		<xs:group ref="argumentChoice"/>
-		<xs:attribute name="key" use="required"/>
-	</xs:complexType>
-	<xs:group name="argumentsGroup">
-		<xs:sequence>
-			<xs:choice minOccurs="0" maxOccurs="unbounded">
-				<xs:element name="array" type="arrayType" />
-				<xs:element name="integer" type="xs:integer" />
-				<xs:element name="string" type="xs:string" />
-				<xs:element name="double" type="xs:double" />
-				<xs:element name="null" />
-				<xs:element name="object" type="objectType" />
-				<xs:element name="file" type="xs:anyURI" />
-				<xs:element name="directory" type="xs:anyURI" />
-				<xs:element name="boolean" type="xs:boolean" />
-			</xs:choice>
-		</xs:sequence>
-	</xs:group>
-	<xs:group name="argumentChoice">
-		<xs:choice>
-			<xs:element name="array" type="arrayType" minOccurs="0" maxOccurs="unbounded"/>
-			<xs:element name="integer" type="xs:integer" minOccurs="0" maxOccurs="unbounded"/>
-			<xs:element name="string" type="xs:string" minOccurs="0" maxOccurs="unbounded"/>
-			<xs:element name="double" type="xs:double" minOccurs="0" maxOccurs="unbounded"/>
-			<xs:element name="null" minOccurs="0" maxOccurs="unbounded"/>
-			<xs:element name="object" type="objectType" minOccurs="0" maxOccurs="unbounded"/>
-			<xs:element name="file" type="xs:anyURI" minOccurs="0" maxOccurs="unbounded"/>
-			<xs:element name="directory" type="xs:anyURI" minOccurs="0" maxOccurs="unbounded"/>
-			<xs:element name="boolean" type="xs:boolean" minOccurs="0" maxOccurs="unbounded"/>
-		</xs:choice>
-	</xs:group>
-	<xs:simpleType name="columnsType">
-		<xs:union>
-			<xs:simpleType>
-				<xs:restriction base="xs:integer"/>
-			</xs:simpleType>
-			<xs:simpleType>
-				<xs:restriction base="xs:string">
-					<xs:enumeration value="max"/>
-				</xs:restriction>
-			</xs:simpleType>
-		</xs:union>
-	</xs:simpleType>
-	<xs:group name="pathGroup">
-		<xs:sequence>
-			<xs:choice minOccurs="0" maxOccurs="unbounded">
-				<xs:element name="directory" type="directoryFilterType"/>
-				<xs:element name="file" type="fileFilterType"/>
-			</xs:choice>
-		</xs:sequence>
-	</xs:group>
-	<xs:complexType name="directoryFilterType">
-		<xs:simpleContent>
-			<xs:extension base="xs:anyURI">
-				<xs:attribute type="xs:string" name="prefix" default=""/>
-				<xs:attribute type="xs:string" name="suffix" default="Test.php"/>
-				<xs:attributeGroup ref="phpVersionGroup"/>
-			</xs:extension>
-		</xs:simpleContent>
-	</xs:complexType>
-	<xs:simpleType name="executionOrderType">
-		<xs:restriction base="xs:string">
-			<xs:enumeration value="default"/>
-			<xs:enumeration value="defects"/>
-			<xs:enumeration value="depends"/>
-			<xs:enumeration value="depends,defects"/>
-			<xs:enumeration value="depends,duration"/>
-			<xs:enumeration value="depends,random"/>
-			<xs:enumeration value="depends,reverse"/>
-			<xs:enumeration value="depends,size"/>
-			<xs:enumeration value="duration"/>
-			<xs:enumeration value="no-depends"/>
-			<xs:enumeration value="no-depends,defects"/>
-			<xs:enumeration value="no-depends,duration"/>
-			<xs:enumeration value="no-depends,random"/>
-			<xs:enumeration value="no-depends,reverse"/>
-			<xs:enumeration value="no-depends,size"/>
-			<xs:enumeration value="random"/>
-			<xs:enumeration value="reverse"/>
-			<xs:enumeration value="size"/>
-		</xs:restriction>
-	</xs:simpleType>
-	<xs:complexType name="fileFilterType">
-		<xs:simpleContent>
-			<xs:extension base="xs:anyURI">
-				<xs:attributeGroup ref="phpVersionGroup"/>
-			</xs:extension>
-		</xs:simpleContent>
-	</xs:complexType>
-	<xs:attributeGroup name="phpVersionGroup">
-		<xs:attribute name="phpVersion" type="xs:string" default="5.3.0"/>
-		<xs:attribute name="phpVersionOperator" type="xs:string" default="&gt;="/>
-	</xs:attributeGroup>
-	<xs:complexType name="phpType">
-		<xs:sequence>
-			<xs:choice maxOccurs="unbounded">
-				<xs:element name="includePath" type="xs:anyURI" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="ini" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="const" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="var" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="env" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="post" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="get" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="cookie" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="server" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="files" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-				<xs:element name="request" type="namedValueType" minOccurs="0" maxOccurs="unbounded"/>
-			</xs:choice>
-		</xs:sequence>
-	</xs:complexType>
-	<xs:complexType name="namedValueType">
-		<xs:attribute name="name" use="required" type="xs:string"/>
-		<xs:attribute name="value" use="required" type="xs:anySimpleType"/>
-		<xs:attribute name="verbatim" use="optional" type="xs:boolean"/>
-		<xs:attribute name="force" use="optional" type="xs:boolean"/>
-	</xs:complexType>
-	<xs:complexType name="phpUnitType">
-		<xs:annotation>
-			<xs:documentation>The main type specifying the document structure</xs:documentation>
-		</xs:annotation>
-		<xs:group ref="configGroup"/>
-		<xs:attributeGroup ref="configAttributeGroup"/>
-	</xs:complexType>
-	<xs:attributeGroup name="configAttributeGroup">
-		<xs:attribute name="backupGlobals" type="xs:boolean" default="false"/>
-		<xs:attribute name="backupStaticAttributes" type="xs:boolean" default="false"/>
-		<xs:attribute name="bootstrap" type="xs:anyURI"/>
-		<xs:attribute name="cacheResult" type="xs:boolean" default="true"/>
-		<xs:attribute name="cacheResultFile" type="xs:anyURI"/>
-		<xs:attribute name="colors" type="xs:boolean" default="false"/>
-		<xs:attribute name="columns" type="columnsType" default="80"/>
-		<xs:attribute name="convertDeprecationsToExceptions" type="xs:boolean" default="true"/>
-		<xs:attribute name="convertErrorsToExceptions" type="xs:boolean" default="true"/>
-		<xs:attribute name="convertNoticesToExceptions" type="xs:boolean" default="true"/>
-		<xs:attribute name="convertWarningsToExceptions" type="xs:boolean" default="true"/>
-		<xs:attribute name="forceCoversAnnotation" type="xs:boolean" default="false"/>
-		<xs:attribute name="printerClass" type="xs:string" default="PHPUnit\TextUI\DefaultResultPrinter"/>
-		<xs:attribute name="printerFile" type="xs:anyURI"/>
-		<xs:attribute name="processIsolation" type="xs:boolean" default="false"/>
-		<xs:attribute name="stopOnDefect" type="xs:boolean" default="false"/>
-		<xs:attribute name="stopOnError" type="xs:boolean" default="false"/>
-		<xs:attribute name="stopOnFailure" type="xs:boolean" default="false"/>
-		<xs:attribute name="stopOnWarning" type="xs:boolean" default="false"/>
-		<xs:attribute name="stopOnIncomplete" type="xs:boolean" default="false"/>
-		<xs:attribute name="stopOnRisky" type="xs:boolean" default="false"/>
-		<xs:attribute name="stopOnSkipped" type="xs:boolean" default="false"/>
-		<xs:attribute name="failOnEmptyTestSuite" type="xs:boolean" default="false"/>
-		<xs:attribute name="failOnIncomplete" type="xs:boolean" default="false"/>
-		<xs:attribute name="failOnRisky" type="xs:boolean" default="false"/>
-		<xs:attribute name="failOnSkipped" type="xs:boolean" default="false"/>
-		<xs:attribute name="failOnWarning" type="xs:boolean" default="false"/>
-		<xs:attribute name="beStrictAboutChangesToGlobalState" type="xs:boolean" default="false"/>
-		<xs:attribute name="beStrictAboutOutputDuringTests" type="xs:boolean" default="false"/>
-		<xs:attribute name="beStrictAboutResourceUsageDuringSmallTests" type="xs:boolean" default="false"/>
-		<xs:attribute name="beStrictAboutTestsThatDoNotTestAnything" type="xs:boolean" default="true"/>
-		<xs:attribute name="beStrictAboutTodoAnnotatedTests" type="xs:boolean" default="false"/>
-		<xs:attribute name="beStrictAboutCoversAnnotation" type="xs:boolean" default="false"/>
-		<xs:attribute name="defaultTimeLimit" type="xs:integer" default="0"/>
-		<xs:attribute name="enforceTimeLimit" type="xs:boolean" default="false"/>
-		<xs:attribute name="timeoutForSmallTests" type="xs:integer" default="1"/>
-		<xs:attribute name="timeoutForMediumTests" type="xs:integer" default="10"/>
-		<xs:attribute name="timeoutForLargeTests" type="xs:integer" default="60"/>
-		<xs:attribute name="testSuiteLoaderClass" type="xs:string" default="PHPUnit\Runner\StandardTestSuiteLoader"/>
-		<xs:attribute name="testSuiteLoaderFile" type="xs:anyURI"/>
-		<xs:attribute name="defaultTestSuite" type="xs:string" default=""/>
-		<xs:attribute name="verbose" type="xs:boolean" default="false"/>
-		<xs:attribute name="testdox" type="xs:boolean" default="false"/>
-		<xs:attribute name="stderr" type="xs:boolean" default="false"/>
-		<xs:attribute name="reverseDefectList" type="xs:boolean" default="false"/>
-		<xs:attribute name="registerMockObjectsFromTestArgumentsRecursively" type="xs:boolean" default="false"/>
-		<xs:attribute name="extensionsDirectory" type="xs:string"/>
-		<xs:attribute name="executionOrder" type="executionOrderType" default="default"/>
-		<xs:attribute name="resolveDependencies" type="xs:boolean" default="true"/>
-		<xs:attribute name="noInteraction" type="xs:boolean" default="false"/>
-	</xs:attributeGroup>
-	<xs:group name="configGroup">
-		<xs:all>
-			<xs:element ref="testSuiteFacet" minOccurs="0"/>
-			<xs:element name="groups" type="groupsType" minOccurs="0"/>
-			<xs:element name="testdoxGroups" type="groupsType" minOccurs="0"/>
-			<xs:element name="coverage" type="coverageType" minOccurs="0"/>
-			<xs:element name="logging" type="loggingType" minOccurs="0"/>
-			<xs:element name="extensions" type="extensionsType" minOccurs="0"/>
-			<xs:element name="listeners" type="listenersType" minOccurs="0"/>
-			<xs:element name="php" type="phpType" minOccurs="0"/>
-		</xs:all>
-	</xs:group>
-	<xs:element name="testSuiteFacet" abstract="true"/>
-	<xs:element name="testsuite" type="testSuiteType" substitutionGroup="testSuiteFacet"/>
-	<xs:element name="testsuites" type="testSuitesType" substitutionGroup="testSuiteFacet"/>
-	<xs:complexType name="testSuitesType">
-		<xs:sequence>
-			<xs:element name="testsuite" type="testSuiteType" maxOccurs="unbounded"/>
-		</xs:sequence>
-	</xs:complexType>
-	<xs:complexType name="testSuiteType">
-		<xs:sequence>
-			<xs:group ref="pathGroup"/>
-			<xs:element name="exclude" type="xs:anyURI" minOccurs="0" maxOccurs="unbounded"/>
-		</xs:sequence>
-		<xs:attribute name="name" type="xs:string" use="required"/>
-	</xs:complexType>
-	<xs:group name="coverageReportGroup">
-		<xs:all>
-			<xs:element name="clover" type="logToFileType" minOccurs="0"/>
-			<xs:element name="cobertura" type="logToFileType" minOccurs="0"/>
-			<xs:element name="crap4j" type="coverageReportCrap4JType" minOccurs="0" />
-			<xs:element name="html" type="coverageReportHtmlType" minOccurs="0" />
-			<xs:element name="php" type="logToFileType" minOccurs="0" />
-			<xs:element name="text" type="coverageReportTextType" minOccurs="0" />
-			<xs:element name="xml" type="logToDirectoryType" minOccurs="0" />
-		</xs:all>
-	</xs:group>
-	<xs:group name="loggingGroup">
-		<xs:all>
-			<xs:element name="junit" type="logToFileType" minOccurs="0" />
-			<xs:element name="teamcity" type="logToFileType" minOccurs="0" />
-			<xs:element name="testdoxHtml" type="logToFileType" minOccurs="0" />
-			<xs:element name="testdoxText" type="logToFileType" minOccurs="0" />
-			<xs:element name="testdoxXml" type="logToFileType" minOccurs="0" />
-			<xs:element name="text" type="logToFileType" minOccurs="0"/>
-		</xs:all>
-	</xs:group>
-	<xs:complexType name="logToFileType">
-		<xs:attribute name="outputFile" type="xs:anyURI" use="required"/>
-	</xs:complexType>
-	<xs:complexType name="logToDirectoryType">
-		<xs:attribute name="outputDirectory" type="xs:anyURI" use="required"/>
-	</xs:complexType>
-	<xs:complexType name="coverageReportCrap4JType">
-		<xs:attribute name="outputFile" type="xs:anyURI" use="required"/>
-		<xs:attribute name="threshold" type="xs:integer"/>
-	</xs:complexType>
-	<xs:complexType name="coverageReportHtmlType">
-		<xs:attribute name="outputDirectory" type="xs:anyURI" use="required"/>
-		<xs:attribute name="lowUpperBound" type="xs:integer" default="50"/>
-		<xs:attribute name="highLowerBound" type="xs:integer" default="90"/>
-	</xs:complexType>
-	<xs:complexType name="coverageReportTextType">
-		<xs:attribute name="outputFile" type="xs:anyURI" use="required"/>
-		<xs:attribute name="showUncoveredFiles" type="xs:boolean" default="false"/>
-		<xs:attribute name="showOnlySummary" type="xs:boolean" default="false"/>
-	</xs:complexType>
-</xs:schema>