Index: src/test/java/io/jenkins/plugins/analysis/warnings/MavenProjectQualityGateITest.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>ISO-8859-1
===================================================================
--- src/test/java/io/jenkins/plugins/analysis/warnings/MavenProjectQualityGateITest.java	(date 1527083251000)
+++ src/test/java/io/jenkins/plugins/analysis/warnings/MavenProjectQualityGateITest.java	(date 1527088445000)
@@ -2,7 +2,14 @@
 
 import java.io.IOException;
 
+import org.junit.Before;
+import org.jvnet.hudson.test.ToolInstallations;
+
+import hudson.FilePath;
 import hudson.maven.MavenModuleSet;
+import hudson.model.TopLevelItem;
+import hudson.tasks.Maven;
+import hudson.tasks.Maven.MavenInstallation;
 
 /**
  * Integration tests of {@link hudson.maven.MavenModuleSet} with {@link io.jenkins.plugins.analysis.core.quality.QualityGate}.
@@ -10,11 +17,18 @@
  * @author Michaela Reitschuster
  */
 public class MavenProjectQualityGateITest extends AbstractQualityGateITest<MavenModuleSet> {
+    @Before
+    public void initializeMaven() throws Exception {
+        MavenInstallation mvn = ToolInstallations.configureMaven35();
+        MavenInstallation m3 = new MavenInstallation("apache-maven-3.3.9", mvn.getHome(), j.NO_PROPERTIES);
+        j.jenkins.getDescriptorByType(Maven.DescriptorImpl.class).setInstallations(m3);
+    }
 
     @Override
     protected MavenModuleSet getProject() {
         MavenModuleSet project = createJob();
         copyFilesToWorkspace(project, "checkstyle-qualitygate.xml");
+        copyToWorkspace(project, "pom.xml");
         return project;
     }
 
@@ -26,4 +40,25 @@
             throw new AssertionError(e);
         }
     }
+
+    /**
+     * Copies the specified files to the workspace.
+     *
+     * @param job
+     *         the job to get the workspace for
+     * @param fileNames
+     *         the files to copy
+     */
+    private void copyToWorkspace(final TopLevelItem job, final String... fileNames) {
+        try {
+            FilePath workspace = j.jenkins.getWorkspaceFor(job);
+            for (String fileName : fileNames) {
+                workspace.child(fileName).copyFrom(asInputStream(fileName));
+            }
+        }
+        catch (IOException | InterruptedException e) {
+            throw new AssertionError(e);
+        }
+    }
+
 }
Index: src/test/resources/io/jenkins/plugins/analysis/warnings/pom.xml
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- src/test/resources/io/jenkins/plugins/analysis/warnings/pom.xml	(date 1527088147000)
+++ src/test/resources/io/jenkins/plugins/analysis/warnings/pom.xml	(date 1527088147000)
@@ -0,0 +1,12 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>warnings-test</artifactId>
+  <packaging>jar</packaging>
+  <name>Warnings Plug-in Test</name>
+  <version>0.0.1-SNAPSHOT</version>
+  <groupId>org.jvnet.hudson.plugins</groupId>
+
+</project>
+
Index: pom.xml
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- pom.xml	(date 1527083251000)
+++ pom.xml	(date 1527087817000)
@@ -97,6 +97,12 @@
       </exclusions>
     </dependency>
 
+    <dependency>
+      <groupId>org.jenkins-ci.main</groupId>
+      <artifactId>jenkins-test-harness-tools</artifactId>
+      <version>2.2</version>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.jvnet.hudson.plugins</groupId>
       <artifactId>analysis-test</artifactId>