diff --git a/core/src/test/resources/com/google/googlejavaformat/java/testdata/java11.input b/core/src/test/resources/com/google/googlejavaformat/java/testdata/java11.input
new file mode 100644
index 000000000..97bd4ac20
--- /dev/null
+++ b/core/src/test/resources/com/google/googlejavaformat/java/testdata/java11.input
@@ -0,0 +1,9 @@
+class Java11 {
+  interface I {
+    private default void f() {}
+  }
+
+  public static void main(String[] args) {
+    var x = 42;
+  }
+}
diff --git a/core/src/test/resources/com/google/googlejavaformat/java/testdata/java11.output b/core/src/test/resources/com/google/googlejavaformat/java/testdata/java11.output
new file mode 100644
index 000000000..97bd4ac20
--- /dev/null
+++ b/core/src/test/resources/com/google/googlejavaformat/java/testdata/java11.output
@@ -0,0 +1,9 @@
+class Java11 {
+  interface I {
+    private default void f() {}
+  }
+
+  public static void main(String[] args) {
+    var x = 42;
+  }
+}