diff --git a/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java b/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
index bb3cf81e8..c9986ebec 100644
--- a/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
+++ b/core-it-suite/src/test/java/org/apache/maven/it/IntegrationTestSuite.java
@@ -106,6 +106,7 @@ public static Test suite()
// -------------------------------------------------------------------------------------------------------------
// suite.addTestSuite( MavenIT0108SnapshotUpdateTest.class ); -- MNG-3137
+ suite.addTestSuite( MavenITmng6720FailFastTest.class );
suite.addTestSuite( MavenITmng6506PackageAnnotationTest.class );
suite.addTestSuite( MavenITmng6256SpecialCharsAlternatePOMLocation.class );
suite.addTestSuite( MavenITmng6386BaseUriPropertyTest.class );
diff --git a/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng6720FailFastTest.java b/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng6720FailFastTest.java
new file mode 100644
index 000000000..6558afd0c
--- /dev/null
+++ b/core-it-suite/src/test/java/org/apache/maven/it/MavenITmng6720FailFastTest.java
@@ -0,0 +1,74 @@
+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.util.ResourceExtractor;
+
+import java.io.File;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * An integration test to check that concurrently running projects are finished
+ * in --fail-fast mode, while downstream projects are skipped.
+ *
+ * MNG-6720.
+ *
+ */
+public class MavenITmng6720FailFastTest
+ extends AbstractMavenIntegrationTestCase
+{
+
+ public MavenITmng6720FailFastTest()
+ {
+ super( "[3.6.0-SNAPSHOT,)" );
+ }
+
+ public void testItShouldWaitForConcurrentModulesToFinish()
+ throws Exception
+ {
+ File testDir = ResourceExtractor.simpleExtractResources( getClass(), "/mng-6720-fail-fast" );
+
+ Verifier verifier = newVerifier( testDir.getAbsolutePath(), false );
+ verifier.setMavenDebug( false );
+ verifier.setAutoclean( false );
+ verifier.addCliOption( "-T" );
+ verifier.addCliOption( "2" );
+ verifier.addCliOption( "-Dmaven.test.redirectTestOutputToFile=true" );
+
+ try
+ {
+ verifier.executeGoals( Arrays.asList( "clean", "test" ) );
+ } catch (VerificationException e)
+ {
+ //expected
+ }
+ verifier.resetStreams();
+
+ List module1Lines = verifier.loadFile(new File(testDir, "module-1/target/surefire-reports/Module1Test-output.txt"), false);
+ assertTrue(module1Lines.contains("Module1"));
+ List module2Lines = verifier.loadFile(new File(testDir, "module-2/target/surefire-reports/Module2Test-output.txt"), false);
+ assertTrue(module2Lines.contains("Module2"));
+ List module3Lines = verifier.loadFile(new File(testDir, "module-3/target/surefire-reports/Module3Test-output.txt"), false);
+ assertTrue(module3Lines.isEmpty());
+
+
+ }
+}
diff --git a/core-it-suite/src/test/resources/mng-6720-fail-fast/module-1/pom.xml b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-1/pom.xml
new file mode 100644
index 000000000..20250689e
--- /dev/null
+++ b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-1/pom.xml
@@ -0,0 +1,39 @@
+
+
+
+
+
+ 4.0.0
+
+ mng-6720-fail-fast
+ module-1
+ 1.0
+
+
+
+ junit
+ junit
+ 4.12
+ test
+
+
+
+
diff --git a/core-it-suite/src/test/resources/mng-6720-fail-fast/module-1/src/test/java/Module1Test.java b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-1/src/test/java/Module1Test.java
new file mode 100644
index 000000000..7c38ed25c
--- /dev/null
+++ b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-1/src/test/java/Module1Test.java
@@ -0,0 +1,10 @@
+import org.junit.Test;
+
+public class Module1Test {
+ @Test
+ public void test() throws Exception {
+ Thread.sleep(1000);
+ System.out.println("Module1");
+ throw new RuntimeException();
+ }
+}
diff --git a/core-it-suite/src/test/resources/mng-6720-fail-fast/module-2/pom.xml b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-2/pom.xml
new file mode 100644
index 000000000..9141b874d
--- /dev/null
+++ b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-2/pom.xml
@@ -0,0 +1,38 @@
+
+
+
+
+
+ 4.0.0
+
+ mng-6720-fail-fast
+ module-2
+ 1.0
+
+
+
+ junit
+ junit
+ 4.12
+ test
+
+
+
diff --git a/core-it-suite/src/test/resources/mng-6720-fail-fast/module-2/src/test/java/Module2Test.java b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-2/src/test/java/Module2Test.java
new file mode 100644
index 000000000..8fffa31a6
--- /dev/null
+++ b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-2/src/test/java/Module2Test.java
@@ -0,0 +1,9 @@
+import org.junit.Test;
+
+public class Module2Test {
+ @Test
+ public void test() throws Exception {
+ Thread.sleep(2000);
+ System.out.println("Module2");
+ }
+}
diff --git a/core-it-suite/src/test/resources/mng-6720-fail-fast/module-3/pom.xml b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-3/pom.xml
new file mode 100644
index 000000000..75ca15cbe
--- /dev/null
+++ b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-3/pom.xml
@@ -0,0 +1,44 @@
+
+
+
+
+
+ 4.0.0
+
+ mng-6720-fail-fast
+ module-3
+ 1.0
+
+
+
+ junit
+ junit
+ 4.12
+ test
+
+
+ mng-6720-fail-fast
+ module2
+ ${project.version}
+
+
+
+
diff --git a/core-it-suite/src/test/resources/mng-6720-fail-fast/module-3/src/test/java/Module3Test.java b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-3/src/test/java/Module3Test.java
new file mode 100644
index 000000000..db3ea9d01
--- /dev/null
+++ b/core-it-suite/src/test/resources/mng-6720-fail-fast/module-3/src/test/java/Module3Test.java
@@ -0,0 +1,8 @@
+import org.junit.Test;
+
+public class Module3Test {
+ @Test
+ public void test() {
+ System.out.println("Module3");
+ }
+}
diff --git a/core-it-suite/src/test/resources/mng-6720-fail-fast/pom.xml b/core-it-suite/src/test/resources/mng-6720-fail-fast/pom.xml
new file mode 100644
index 000000000..8d42f231c
--- /dev/null
+++ b/core-it-suite/src/test/resources/mng-6720-fail-fast/pom.xml
@@ -0,0 +1,37 @@
+
+
+
+
+
+ 4.0.0
+
+ mng-6720-fail-fast
+ parent
+ 1.0
+
+ pom
+
+
+ module-1
+ module-2
+ module-3
+
+