diff --git a/Code/Mantid/Framework/Kernel/test/FilteredTimeSeriesPropertyTest.h b/Code/Mantid/Framework/Kernel/test/FilteredTimeSeriesPropertyTest.h
index 7349652989c03b247ea14368391129ceeea43451..5872b64e7efbb9dcad00e54f07b89174e1ad66fc 100644
--- a/Code/Mantid/Framework/Kernel/test/FilteredTimeSeriesPropertyTest.h
+++ b/Code/Mantid/Framework/Kernel/test/FilteredTimeSeriesPropertyTest.h
@@ -45,7 +45,7 @@ public:
     auto source = createTestSeries("name");
     auto filter = createTestFilter();
 
-    auto filtered = new FilteredTimeSeriesProperty<double>(source, *filter);
+    auto filtered = new FilteredTimeSeriesProperty<double>(source, *filter, true);
 
     TS_ASSERT_EQUALS(filtered->size(), 2);
     TS_ASSERT_EQUALS(filtered->nthInterval(0).begin_str(), "2007-Nov-30 16:17:25");