diff --git a/finalguard/finalguard-javac-plugin/src/test/java/net/woggioni/finalguard/PluginTest.java b/finalguard/finalguard-javac-plugin/src/test/java/net/woggioni/finalguard/PluginTest.java
index 2d710aa..d8b3d07 100644
--- a/finalguard/finalguard-javac-plugin/src/test/java/net/woggioni/finalguard/PluginTest.java
+++ b/finalguard/finalguard-javac-plugin/src/test/java/net/woggioni/finalguard/PluginTest.java
@@ -154,7 +154,11 @@ public class PluginTest {
                     )),
                     Arguments.of(prefix + "TestCase12.java", Collections.emptyList()),
                     Arguments.of(prefix + "TestCase13.java", Arrays.asList(ABSTRACT_METHOD_PARAM.getMessage("x"), ABSTRACT_METHOD_PARAM.getMessage("y"))),
-                    Arguments.of(prefix + "TestCase14.java", Arrays.asList(ABSTRACT_METHOD_PARAM.getMessage("x"), ABSTRACT_METHOD_PARAM.getMessage("y")))
+                    Arguments.of(prefix + "TestCase14.java", Arrays.asList(ABSTRACT_METHOD_PARAM.getMessage("x"), ABSTRACT_METHOD_PARAM.getMessage("y"))),
+                    Arguments.of(prefix + "TestCase15.java",
+                            Arrays.asList(
+                                    LOCAL_VAR.getMessage("a"),
+                                    METHOD_PARAM.getMessage("source")))
             );
         }
     }
diff --git a/finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase15.java b/finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase15.java
new file mode 100644
index 0000000..7dc1175
--- /dev/null
+++ b/finalguard/finalguard-javac-plugin/src/test/resources/net/woggioni/finalguard/test/TestCase15.java
@@ -0,0 +1,24 @@
+import java.io.FilterInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class TestCase15 {
+    public static void foo() {
+        final InputStream source = null;
+        final InputStream is = new FilterInputStream(source) {
+
+            @Override
+            public int read() throws IOException {
+                int a = 5;
+                return a;
+            }
+        };
+    }
+
+    static class Bar extends FilterInputStream {
+
+        public Bar(InputStream source) {
+            super(source);
+        }
+    };
+}
\ No newline at end of file