diff --git a/its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java b/its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
index 4ec89918dd..16f4e0aa08 100644
--- a/its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
+++ b/its/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
@@ -86,6 +86,7 @@ public class IntegrationTestSuite
// suite.addTestSuite( MavenIT0109ReleaseUpdateTest.class );
// suite.addTestSuite( MavenIT0108SnapshotUpdateTest.class ); -- MNG-3137
+ suite.addTestSuite( MavenITmng4318ProjectExecutionRootTest.class );
suite.addTestSuite( MavenITmng4317PluginVersionResolutionFromMultiReposTest.class );
suite.addTestSuite( MavenITmng4314DirectInvocationOfAggregatorTest.class );
suite.addTestSuite( MavenITmng4312TypeAwarePluginParameterExpressionInjectionTest.class );
diff --git a/its/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4318ProjectExecutionRootTest.java b/its/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4318ProjectExecutionRootTest.java
new file mode 100644
index 0000000000..234f50e614
--- /dev/null
+++ b/its/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng4318ProjectExecutionRootTest.java
@@ -0,0 +1,75 @@
+package org.apache.maven.it;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import org.apache.maven.it.Verifier;
+import org.apache.maven.it.util.ResourceExtractor;
+
+import java.io.File;
+import java.util.Properties;
+
+/**
+ * This is a test set for MNG-4318.
+ *
+ * @author Benjamin Bentmann
+ */
+public class MavenITmng4318ProjectExecutionRootTest
+ extends AbstractMavenIntegrationTestCase
+{
+
+ public MavenITmng4318ProjectExecutionRootTest()
+ {
+ super( ALL_MAVEN_VERSIONS );
+ }
+
+ /**
+ * Verify that MavenProject.isExecutionRoot() is properly set within a reactor.
+ */
+ public void testit()
+ throws Exception
+ {
+ File testDir = ResourceExtractor.simpleExtractResources( getClass(), "/mng-4318" );
+
+ Verifier verifier = new Verifier( testDir.getAbsolutePath() );
+ verifier.setAutoclean( false );
+ verifier.deleteDirectory( "target" );
+ verifier.deleteDirectory( "sub-1/target" );
+ verifier.deleteDirectory( "sub-2/target" );
+ verifier.deleteDirectory( "sub-2/sub-3/target" );
+ verifier.executeGoal( "validate" );
+ verifier.verifyErrorFreeLog();
+ verifier.resetStreams();
+
+ Properties props;
+
+ props = verifier.loadProperties( "target/project.properties" );
+ assertEquals( "true", props.getProperty( "project.executionRoot" ) );
+
+ props = verifier.loadProperties( "sub-1/target/project.properties" );
+ assertEquals( "false", props.getProperty( "project.executionRoot" ) );
+
+ props = verifier.loadProperties( "sub-2/target/project.properties" );
+ assertEquals( "false", props.getProperty( "project.executionRoot" ) );
+
+ props = verifier.loadProperties( "sub-2/sub-3/target/project.properties" );
+ assertEquals( "false", props.getProperty( "project.executionRoot" ) );
+ }
+
+}
diff --git a/its/core-it-suite/src/test/resources/mng-4318/pom.xml b/its/core-it-suite/src/test/resources/mng-4318/pom.xml
new file mode 100644
index 0000000000..e3c09d496e
--- /dev/null
+++ b/its/core-it-suite/src/test/resources/mng-4318/pom.xml
@@ -0,0 +1,64 @@
+
+
+
+
+
+ 4.0.0
+
+ org.apache.maven.its.mng4318
+ root
+ 0.1
+ pom
+
+ Maven Integration Test :: MNG-4318
+
+ Verify that MavenProject.isExecutionRoot() is properly set within a reactor.
+
+
+
+ sub-1
+ sub-2
+
+
+
+
+
+ org.apache.maven.its.plugins
+ maven-it-plugin-expression
+ 2.1-SNAPSHOT
+
+ target/project.properties
+
+ project/executionRoot
+
+
+
+
+ test
+ validate
+
+ eval
+
+
+
+
+
+
+
diff --git a/its/core-it-suite/src/test/resources/mng-4318/sub-1/pom.xml b/its/core-it-suite/src/test/resources/mng-4318/sub-1/pom.xml
new file mode 100644
index 0000000000..846ad937dc
--- /dev/null
+++ b/its/core-it-suite/src/test/resources/mng-4318/sub-1/pom.xml
@@ -0,0 +1,40 @@
+
+
+
+
+
+ 4.0.0
+
+
+ org.apache.maven.its.mng4318
+ root
+ 0.1
+
+
+ org.apache.maven.its.mng4318
+ sub-1
+ 0.1
+ jar
+
+ Maven Integration Test :: MNG-4318 :: Sub-1
+
+ Verify that MavenProject.isExecutionRoot() is properly set within a reactor.
+
+
diff --git a/its/core-it-suite/src/test/resources/mng-4318/sub-2/pom.xml b/its/core-it-suite/src/test/resources/mng-4318/sub-2/pom.xml
new file mode 100644
index 0000000000..d0a6136cf4
--- /dev/null
+++ b/its/core-it-suite/src/test/resources/mng-4318/sub-2/pom.xml
@@ -0,0 +1,44 @@
+
+
+
+
+
+ 4.0.0
+
+
+ org.apache.maven.its.mng4318
+ root
+ 0.1
+
+
+ org.apache.maven.its.mng4318
+ sub-2
+ 0.1
+ pom
+
+ Maven Integration Test :: MNG-4318 :: Sub-2
+
+ Verify that MavenProject.isExecutionRoot() is properly set within a reactor.
+
+
+
+ sub-3
+
+
diff --git a/its/core-it-suite/src/test/resources/mng-4318/sub-2/sub-3/pom.xml b/its/core-it-suite/src/test/resources/mng-4318/sub-2/sub-3/pom.xml
new file mode 100644
index 0000000000..6dab4983af
--- /dev/null
+++ b/its/core-it-suite/src/test/resources/mng-4318/sub-2/sub-3/pom.xml
@@ -0,0 +1,40 @@
+
+
+
+
+
+ 4.0.0
+
+
+ org.apache.maven.its.mng4318
+ sub-2
+ 0.1
+
+
+ org.apache.maven.its.mng4318
+ sub-3
+ 0.1
+ jar
+
+ Maven Integration Test :: MNG-4318 :: Sub-3
+
+ Verify that MavenProject.isExecutionRoot() is properly set within a reactor.
+
+