diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/invoker.properties b/license-maven-plugin/src/it/tri-license-set-with-includes/invoker.properties
new file mode 100644
index 000000000..a18fd80da
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/invoker.properties
@@ -0,0 +1 @@
+invoker.goals=license:format -Dlicense.licenseSets.licenseSet=src/main/java/com/mycila/it/Unformatted2.java
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-1.txt b/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-1.txt
new file mode 100644
index 000000000..cd4a9d5f0
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-1.txt
@@ -0,0 +1,2 @@
+This is the 1st
+mock license
\ No newline at end of file
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-2.txt b/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-2.txt
new file mode 100644
index 000000000..891e9697e
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-2.txt
@@ -0,0 +1,2 @@
+This is the 2nd
+mock license
\ No newline at end of file
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-3.txt b/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-3.txt
new file mode 100644
index 000000000..4a01d0771
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/mock-license-3.txt
@@ -0,0 +1,2 @@
+This is the 3rd
+mock license
\ No newline at end of file
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/pom.xml b/license-maven-plugin/src/it/tri-license-set-with-includes/pom.xml
new file mode 100644
index 000000000..6a3f5e9df
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/pom.xml
@@ -0,0 +1,59 @@
+<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/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.mycila.license-maven-plugin.it</groupId>
+  <artifactId>tri-license-set</artifactId>
+  <version>1.0.0</version>
+
+  <name>Check a Triple License Set</name>
+  <description>Integration Test for checking a triple license set</description>
+
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>com.mycila</groupId>
+        <artifactId>license-maven-plugin</artifactId>
+        <version>@project.version@</version>
+        <configuration>
+          <licenseSets>
+            <licenseSet>
+              <header>mock-license-1.txt</header>
+              <excludes>
+                <exclude>invoker.properties</exclude>
+                <exclude>pom.xml</exclude>
+                <exclude>*.groovy</exclude>
+                <exclude>**/*.bak</exclude>
+                <exclude>*.log</exclude>
+                <exclude>mock-license-*</exclude>
+                <exclude>**/Unformatted2.java</exclude>
+                <exclude>**/Unformatted3.java</exclude>
+              </excludes>
+            </licenseSet>
+            <licenseSet>
+              <header>mock-license-2.txt</header>
+              <excludes>
+                <exclude>invoker.properties</exclude>
+                <exclude>pom.xml</exclude>
+                <exclude>*.groovy</exclude>
+                <exclude>**/*.bak</exclude>
+                <exclude>*.log</exclude>
+                <exclude>mock-license-*</exclude>
+                <exclude>**/Unformatted1.java</exclude>
+                <exclude>**/Unformatted3.java</exclude>
+              </excludes>
+            </licenseSet>
+            <licenseSet>
+              <header>mock-license-3.txt</header>
+              <includes>
+                <include>**/Unformatted3.java</include>
+              </includes>
+            </licenseSet>
+          </licenseSets>
+        </configuration>
+      </plugin>
+    </plugins>
+  </build>
+
+</project>
\ No newline at end of file
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/setup.groovy b/license-maven-plugin/src/it/tri-license-set-with-includes/setup.groovy
new file mode 100644
index 000000000..43586ed3f
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/setup.groovy
@@ -0,0 +1,23 @@
+import java.nio.file.Files
+import java.nio.file.Path
+
+final Path base = basedir.toPath()
+
+if (!Files.exists(base) || !Files.isDirectory(base)) {
+  System.err.println("base directory is missing.")
+  return false
+}
+
+final List<String> ALL_FILES = Arrays.asList("Unformatted1.java", "Unformatted2.java", "Unformatted3.java")
+
+for (final String filename : ALL_FILES) {
+  final Path unformattedJavaFile = base.resolve("src/main/java/com/mycila/it/" + filename)
+  if (!Files.exists(unformattedJavaFile)) {
+    System.err.println(filename + " file is missing.")
+    return false
+  }
+
+  Files.copy(unformattedJavaFile, unformattedJavaFile.resolveSibling(filename + ".bak"))
+}
+
+return true;
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted1.java b/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted1.java
new file mode 100644
index 000000000..53c628eba
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted1.java
@@ -0,0 +1,4 @@
+package com.mycila.it;
+
+public class Unformatted1 {
+}
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted2.java b/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted2.java
new file mode 100644
index 000000000..2c4311d3c
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted2.java
@@ -0,0 +1,4 @@
+package com.mycila.it;
+
+public class Unformatted2 {
+}
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted3.java b/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted3.java
new file mode 100644
index 000000000..d24e2823e
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/src/main/java/com/mycila/it/Unformatted3.java
@@ -0,0 +1,4 @@
+package com.mycila.it;
+
+public class Unformatted3 {
+}
diff --git a/license-maven-plugin/src/it/tri-license-set-with-includes/verify.groovy b/license-maven-plugin/src/it/tri-license-set-with-includes/verify.groovy
new file mode 100644
index 000000000..4e4904938
--- /dev/null
+++ b/license-maven-plugin/src/it/tri-license-set-with-includes/verify.groovy
@@ -0,0 +1,54 @@
+import java.nio.file.Files
+import java.nio.file.Path
+
+import static org.junit.jupiter.api.Assertions.assertEquals
+
+
+final Path base = basedir.toPath()
+
+if (!Files.exists(base) || !Files.isDirectory(base)) {
+  System.err.println("base directory is missing.")
+  return false
+}
+
+for (int i = 1; i <= 3; i++) {
+
+  final Path license = base.resolve("mock-license-" + i + ".txt")
+  if (!Files.exists(license)) {
+    System.err.println(license.getFileName() + " file is missing.")
+    return false
+  }
+
+  final String filename = "Unformatted" + i + ".java"
+
+  final Path unformattedJavaFile = base.resolve("src/main/java/com/mycila/it/" + filename + ".bak")
+  if (!Files.exists(unformattedJavaFile)) {
+    System.err.println(unformattedJavaFile.getFileName() + " file is missing (should have been created by setup.groovy).")
+    return false
+  }
+
+  final Path formattedJavaFile = base.resolve("src/main/java/com/mycila/it/" + filename)
+  if (!Files.exists(formattedJavaFile)) {
+    System.err.println(formattedJavaFile.getFileName() + " file is missing.")
+    return false
+  }
+
+  final StringBuilder expected = new StringBuilder();
+  if (i == 2) {
+    expected.append("/*\n");
+    license.withReader { reader ->
+      while ((line = reader.readLine()) != null) {
+        expected.append(" * ").append(line).append('\n')
+      }
+    }
+    expected.append(" */\n")
+  }
+
+  expected.append(new String(Files.readAllBytes(unformattedJavaFile)))
+
+  final String actual = new String(Files.readAllBytes(formattedJavaFile))
+
+  assertEquals(expected.toString(), actual)
+}
+
+return true