diff --git a/MantidPlot/test/squish_test_suites/refl_gui_tests/envvars b/MantidPlot/test/squish_test_suites/refl_gui_tests/envvars
index 1274936e45e9..7554408f3b07 100644
--- a/MantidPlot/test/squish_test_suites/refl_gui_tests/envvars
+++ b/MantidPlot/test/squish_test_suites/refl_gui_tests/envvars
@@ -1 +1,2 @@
-LD_LIBRARY_PATH=/opt/mantidnightly/lib/paraview-5.4
+LD_LIBRARY_PATH=/opt/mantidnightly/lib/paraview-5.4:/opt/mantidnightly/plugins/qtplugins/mantid
+QT_API=pyqt