diff --git a/tests/auto/corelib/concurrent/qtconcurrentfilter/qtconcurrentfilter.pro b/tests/auto/corelib/concurrent/qtconcurrentfilter/qtconcurrentfilter.pro
index 3af1a1ca2c..c5cfb2a093 100644
--- a/tests/auto/corelib/concurrent/qtconcurrentfilter/qtconcurrentfilter.pro
+++ b/tests/auto/corelib/concurrent/qtconcurrentfilter/qtconcurrentfilter.pro
@@ -3,3 +3,4 @@ DEFINES += QT_STRICT_ITERATORS
 SOURCES += tst_qtconcurrentfilter.cpp
 QT = core
 CONFIG += parallel_test
+CONFIG += insignificant_test # See QTBUG-20688