diff --git a/qt/python/mantidqt/project/test/test_plotssaver.py b/qt/python/mantidqt/project/test/test_plotssaver.py
index e58ef031ab79e4135a4e3a87bc08f81164df909e..4af44f53ec49400149bdea53c9d9137b4808e100 100644
--- a/qt/python/mantidqt/project/test/test_plotssaver.py
+++ b/qt/python/mantidqt/project/test/test_plotssaver.py
@@ -32,10 +32,10 @@ class PlotsSaverTest(unittest.TestCase):
                                                         u'background_color': u'#ffffff',
                                                         u'edge_color': u'#000000',
                                                         u'transparency': 0.5,
-                                                        u'entries_font': u'serif',
+                                                        u'entries_font': u'Impact',
                                                         u'entries_size': 10,
                                                         u'entries_color': u'#000000',
-                                                        u'title_font': u'serif',
+                                                        u'title_font': u'Impact',
                                                         u'title_size': 12,
                                                         u'title_color': u'#000000',
                                                         u'marker_size': 2.0,
diff --git a/qt/python/mantidqt/widgets/plotconfigdialog/test/test_apply_all_properties.py b/qt/python/mantidqt/widgets/plotconfigdialog/test/test_apply_all_properties.py
index 83c95c01d62449e932a7679417a88e6d36efd9a4..78760f18f7006a458160074b6f3294462d61dc87 100644
--- a/qt/python/mantidqt/widgets/plotconfigdialog/test/test_apply_all_properties.py
+++ b/qt/python/mantidqt/widgets/plotconfigdialog/test/test_apply_all_properties.py
@@ -69,10 +69,10 @@ new_legend_props = {
     'background_color': '#ffffff',
     'edge_color': '#000000',
     'transparency': 0.5,
-    'entries_font': 'serif',
+    'entries_font': 'Impact',
     'entries_size': 12,
     'entries_color': '#000000',
-    'title_font': 'serif',
+    'title_font': 'Impact',
     'title_size': 14,
     'title_color': '#000000',
     'marker_size': 3.0,