diff --git a/.github/workflows/python-build.yml b/.github/workflows/python-build.yml
index b3be771..f5162ab 100644
--- a/.github/workflows/python-build.yml
+++ b/.github/workflows/python-build.yml
@@ -38,3 +38,6 @@ jobs:
       run: |
         pip install mypy
         pipenv run check-types
+    - name: End-to-End tests
+      run: |
+        pipenv run test-e2e
diff --git a/Pipfile b/Pipfile
index e429f4e..2df16be 100644
--- a/Pipfile
+++ b/Pipfile
@@ -26,4 +26,5 @@ allow_prereleases = true
 [scripts]
 lint = "flake8 . --count --max-complexity=10 --max-line-length=127 --statistics"
 check-types = "mypy ./license-sh"
-test = "python -m unittest"
+test = "python -m unittest discover -s ./tests"
+test-e2e = "python -m unittest discover -s ./tests_e2e"
diff --git a/tests_e2e/__init__.py b/tests_e2e/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests_e2e/test_data/__init__.py b/tests_e2e/test_data/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/tests_e2e/test_data/pom.xml b/tests_e2e/test_data/pom.xml
new file mode 100644
index 0000000..5a068f7
--- /dev/null
+++ b/tests_e2e/test_data/pom.xml
@@ -0,0 +1,59 @@
+<?xml version="1.0"?>
+<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>sh.license</groupId>
+    <version>0.9.23</version>
+    <artifactId>license</artifactId>
+    <name>license-sh maven test</name>
+    <packaging>jar</packaging>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.javassist</groupId>
+            <artifactId>javassist</artifactId>
+            <version>3.22.0-GA</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-annotations</artifactId>
+            <version>2.9.5</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.9.5</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.8.3</version>
+            <optional>true</optional>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>1.20</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>1.20</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>
diff --git a/tests_e2e/test_maven.py b/tests_e2e/test_maven.py
new file mode 100644
index 0000000..c3fbfc0
--- /dev/null
+++ b/tests_e2e/test_maven.py
@@ -0,0 +1,45 @@
+import unittest
+
+from license_sh.commands.run_license_sh import run_license_sh
+from anytree.importer import JsonImporter
+from unittest.mock import patch
+from tests_e2e import test_data
+from importlib import resources
+
+ARGUMENTS = {
+    '--config': None,
+    '--debug': False,
+    '--dependencies': False,
+    '--help': False,
+    '--interactive': False,
+    '--output': 'console',
+    '--project': None,
+    '--tree': False,
+    '--version': False,
+    '<path>': None,
+    'config': False
+}
+
+
+class MavenCase(unittest.TestCase):
+    @patch('builtins.print')
+    def test_valid_json(self, print_mock):
+        with resources.path(test_data, "") as test_data_path:
+            with self.assertRaises(SystemExit):
+                run_license_sh({**ARGUMENTS, **{
+                    '--output': 'json',
+                    '<path>': test_data_path,
+                    '--project': 'maven'
+                }})
+        calls = print_mock.call_args_list
+
+        std_out = ""
+        for call in calls:
+            file_arg = call.kwargs.get('file', None)
+            if not file_arg:
+                std_out += ''.join(call.args)
+        self.assertTrue(bool(JsonImporter().import_(std_out)))
+
+
+if __name__ == '__main__':
+    unittest.main()