diff --git a/pom.xml b/pom.xml
index 075f5c8..f3a8346 100644
--- a/pom.xml
+++ b/pom.xml
@@ -138,6 +138,12 @@
             <version>3.26.3</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>uk.org.webcompere</groupId>
+            <artifactId>system-stubs-jupiter</artifactId>
+            <version>2.1.7</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
diff --git a/src/test/java/org/jboss/pnc/konfluxtooling/prebuild/PreprocessorTest.java b/src/test/java/org/jboss/pnc/konfluxtooling/prebuild/PreprocessorTest.java
new file mode 100644
index 0000000..5fce9aa
--- /dev/null
+++ b/src/test/java/org/jboss/pnc/konfluxtooling/prebuild/PreprocessorTest.java
@@ -0,0 +1,53 @@
+package org.jboss.pnc.konfluxtooling.prebuild;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Path;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.junit.jupiter.api.io.TempDir;
+
+import io.quarkus.test.junit.QuarkusTest;
+import uk.org.webcompere.systemstubs.environment.EnvironmentVariables;
+import uk.org.webcompere.systemstubs.jupiter.SystemStub;
+import uk.org.webcompere.systemstubs.jupiter.SystemStubsExtension;
+
+@ExtendWith(SystemStubsExtension.class)
+@QuarkusTest
+public class PreprocessorTest {
+
+    {
+        System.setProperty("org.slf4j.simpleLogger.log.com.github.dockerjava.api.command.BuildImageResultCallback", "debug");
+    }
+
+    @SystemStub
+    private EnvironmentVariables variables = new EnvironmentVariables("BUILD_SCRIPT", """
+            echo 'BUILDING!'""");
+
+    @Test
+    public void testGenerate(@TempDir Path tempDir) throws IOException, InterruptedException {
+
+        Preprocessor preprocessor = new Preprocessor();
+        preprocessor.type = Preprocessor.ToolType.ANT;
+        preprocessor.recipeImage = "quay.io/redhat-user-workloads/konflux-jbs-pnc-tenant/jvm-build-service-builder-images/ubi7:latest";
+        preprocessor.buildRequestProcessorImage = "quay.io/redhat-user-workloads/konflux-jbs-pnc-tenant/konflux-tooling:latest";
+        preprocessor.buildRoot = tempDir;
+        preprocessor.javaVersion = "7";
+        preprocessor.buildToolVersion = "1.9.16";
+
+        preprocessor.run();
+
+        Process process = new ProcessBuilder("buildah", "build", "-f", tempDir.toString() + "/.jbs/Containerfile", ".")
+                .directory(tempDir.toFile()).redirectErrorStream(true).start();
+
+        String text = new String(process.getInputStream().readAllBytes(), StandardCharsets.UTF_8);
+
+        assertTrue(text.contains("BUILDING!"));
+        assertTrue(text.contains("Listening on: http://0.0.0.0:8084"));
+        assertEquals(0, process.waitFor());
+    }
+}