diff --git a/trace-server/org.eclipse.tracecompass.incubator.trace.server.jersey.rest.core.tests/src/org/eclipse/tracecompass/incubator/trace/server/jersey/rest/core/tests/services/DataTreeDataProviderServiceTest.java b/trace-server/org.eclipse.tracecompass.incubator.trace.server.jersey.rest.core.tests/src/org/eclipse/tracecompass/incubator/trace/server/jersey/rest/core/tests/services/DataTreeDataProviderServiceTest.java
index ca5507982..8131dcc02 100644
--- a/trace-server/org.eclipse.tracecompass.incubator.trace.server.jersey.rest.core.tests/src/org/eclipse/tracecompass/incubator/trace/server/jersey/rest/core/tests/services/DataTreeDataProviderServiceTest.java
+++ b/trace-server/org.eclipse.tracecompass.incubator.trace.server.jersey.rest.core.tests/src/org/eclipse/tracecompass/incubator/trace/server/jersey/rest/core/tests/services/DataTreeDataProviderServiceTest.java
@@ -144,7 +144,7 @@ private static List<DataTreeEntry> getDataTreeEntryModel(UUID uuid, String id, l
         return model;
     }
 
-    // FIXME: isFiltered should be part of the TSP
+    // FIXME isFiltered is out-of-spec (see https://github.com/eclipse-tracecompass-incubator/org.eclipse.tracecompass.incubator/issues/251)
     private static class FilteredTreeParameter extends TreeParameters {
         private boolean isFiltered;
         public FilteredTreeParameter isFiltered(boolean flag) {