diff --git a/composer.json b/composer.json
index 6e489d1..95f2ce4 100644
--- a/composer.json
+++ b/composer.json
@@ -10,11 +10,11 @@
         }
     ],
     "config": {
-        "platform": {
-            "php": "7.2.9"
-        },
-        "sort-packages": true
+    "platform": {
+        "php": "7.2.9"
     },
+    "sort-packages": true
+},
     "autoload": {
         "psr-4": {
             "Infection\\AbstractTestFramework\\": "src/"
diff --git a/src/TestFrameworkAdapterFactory.php b/src/TestFrameworkAdapterFactory.php
new file mode 100644
index 0000000..3b3b657
--- /dev/null
+++ b/src/TestFrameworkAdapterFactory.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ * This code is licensed under the BSD 3-Clause License.
+ *
+ * Copyright (c) 2017, Maks Rafalko
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+declare(strict_types=1);
+
+namespace Infection\AbstractTestFramework;
+
+/**
+ * @internal
+ */
+interface TestFrameworkAdapterFactory
+{
+    public static function create(
+        string $testFrameworkExecutable,
+        string $tmpDir,
+        string $testFrameworkConfigPath,
+        string $testFrameworkConfigDir,
+        string $jUnitFilePath,
+        string $projectDir,
+        array $sourceDirectories,
+        bool $skipCoverage
+    ): TestFrameworkAdapter;
+}