diff --git a/graphql-java-support/src/test/java/com/apollographql/federation/graphqljava/FederatedTracingInstrumentationTest.java b/graphql-java-support/src/test/java/com/apollographql/federation/graphqljava/FederatedTracingInstrumentationTest.java
index a618b9ea..c3673022 100644
--- a/graphql-java-support/src/test/java/com/apollographql/federation/graphqljava/FederatedTracingInstrumentationTest.java
+++ b/graphql-java-support/src/test/java/com/apollographql/federation/graphqljava/FederatedTracingInstrumentationTest.java
@@ -37,6 +37,15 @@ void setupSchema() {
                             objects.add(new Object());
                             objects.add(new Object());
                             return objects;
+                        }).dataFetcher("listOfLists", env -> {
+                            ArrayList<ArrayList<Object>> lists = new ArrayList<>(2);
+                            lists.add(new ArrayList<>(2));
+                            lists.add(new ArrayList<>(2));
+                            lists.get(0).add(new Object());
+                            lists.get(0).add(new Object());
+                            lists.get(1).add(new Object());
+                            lists.get(1).add(new Object());
+                            return lists;
                         }))
                 .type("Widget", builder ->
                         // Widget.foo works normally, Widget.bar always throws an error
@@ -58,7 +67,7 @@ void setupSchema() {
 
     @Test
     void testTracing() throws InvalidProtocolBufferException {
-        Map<String, Object> result = graphql.execute("{ widgets { foo, baz: bar } }").toSpecification();
+        Map<String, Object> result = graphql.execute("{ widgets { foo, baz: bar }, listOfLists { foo } }").toSpecification();
 
         Object extensions = result.get("extensions");
         assertTrue(extensions instanceof Map);
@@ -72,7 +81,9 @@ void testTracing() throws InvalidProtocolBufferException {
         assertTrue(trace.getEndTime().getSeconds() > 0, "End time has seconds");
         assertTrue(trace.getEndTime().getNanos() > 0, "End time has nanoseconds");
         assertTrue(trace.getDurationNs() > 0, "DurationNs is greater than zero");
-        assertEquals(1, trace.getRoot().getChildCount());
+        assertEquals(2, trace.getRoot().getChildCount());
+
+        // widgets
 
         Reports.Trace.Node widgets = trace.getRoot().getChild(0);
         assertTrue(widgets.getStartTime() > 0, "Field start time is greater than zero");
@@ -110,5 +121,24 @@ void testTracing() throws InvalidProtocolBufferException {
         assertEquals(18, error.getLocation(0).getColumn());
         assertEquals(1, error.getLocation(0).getLine());
 
+        // listOfLists
+        Reports.Trace.Node listOfLists = trace.getRoot().getChild(1);
+        assertEquals(0, listOfLists.getChild(0).getIndex());
+        assertEquals(2, listOfLists.getChild(0).getChildCount());
+        assertEquals(1, listOfLists.getChild(1).getIndex());
+        assertEquals(2, listOfLists.getChild(1).getChildCount());
+
+        assertEquals(0, listOfLists.getChild(0).getChild(0).getIndex());
+        assertEquals(1, listOfLists.getChild(0).getChild(0).getChildCount());
+        assertEquals(0, listOfLists.getChild(0).getChild(1).getIndex());
+        assertEquals(1, listOfLists.getChild(0).getChild(1).getChildCount());
+
+        Reports.Trace.Node deeplyNestedFoo = listOfLists.getChild(0).getChild(0).getChild(0);
+        assertTrue(deeplyNestedFoo.getStartTime() > 0, "Field start time is greater than zero");
+        assertTrue(deeplyNestedFoo.getEndTime() > 0, "Field end time is greater than zero");
+        assertEquals("Widget", deeplyNestedFoo.getParentType());
+        assertEquals("String", deeplyNestedFoo.getType());
+        assertEquals("foo", deeplyNestedFoo.getResponseName());
+        assertEquals(0, deeplyNestedFoo.getErrorCount());
     }
 }