diff --git a/src/test/java/spoon/test/processing/ProcessingTest.java b/src/test/java/spoon/test/processing/ProcessingTest.java
index 0687f2f01d9..85dce429ae4 100644
--- a/src/test/java/spoon/test/processing/ProcessingTest.java
+++ b/src/test/java/spoon/test/processing/ProcessingTest.java
@@ -64,6 +64,26 @@
 
 public class ProcessingTest {
 
+	@Test
+	public void testUnknownSourceWithLambdaInsideInnerClass() throws Exception {
+		CtClassProcessor myProcessor = new CtClassProcessor(){
+			@Override
+			public void process(CtClass element) {
+				super.process(element);
+				assertNotNull(element.getPosition());
+				assertNotNull(element.getPosition().getFile());
+			}
+		};
+
+		Launcher launcher = new Launcher();
+
+		launcher.addInputResource("./src/test/resources/noclasspath/lambdas/UnknownSourceLambdaInnerClass.java");
+		launcher.getEnvironment().setNoClasspath(true);
+		launcher.buildModel();
+		launcher.addProcessor(myProcessor);
+		launcher.process();
+	}
+
 	@Test
 	public void testInsertBegin() throws Exception {
 		CtClass<?> type = build("spoon.test.processing.testclasses", "SampleForInsertBefore");
diff --git a/src/test/resources/noclasspath/lambdas/UnknownSourceLambdaInnerClass.java b/src/test/resources/noclasspath/lambdas/UnknownSourceLambdaInnerClass.java
new file mode 100644
index 00000000000..cf35d694195
--- /dev/null
+++ b/src/test/resources/noclasspath/lambdas/UnknownSourceLambdaInnerClass.java
@@ -0,0 +1,29 @@
+public class Test {
+    /**
+     * This class will be built with an '(Unknown source)' as position
+     */
+    static class Failing {
+        ClickListener listener;
+    }
+
+    private static class ExtendedClass extends Failing {
+        public void test(View itemView) {
+            // The difference in behaviour happens if I comment this line out
+            itemView.setOnClickListener(v -> listener.onItemClick(getAdapterPosition()));
+        }
+    }
+
+// TODO: I wanted to add a class showing a successful input in the processor but adding it raise another error from JDTTreeBuilder, if you could have a look :)
+    /**
+     * This class will be built with the right position
+     */
+//    static class Success {
+//        ClickListener listener;
+//    }
+//
+//    private static class ExtendedClass extends Success {
+//        public void test(View itemView) {
+//            itemView.setOnClickListener(new Runnable());
+//        }
+//    }
+}
\ No newline at end of file