diff --git a/src/calibre/gui2/tag_mapper.py b/src/calibre/gui2/tag_mapper.py
index 6bf5cf4943..ea4fa8f35e 100644
--- a/src/calibre/gui2/tag_mapper.py
+++ b/src/calibre/gui2/tag_mapper.py
@@ -307,6 +307,7 @@ class Tester(Dialog):
         h.addWidget(b)
         self.result = la = QLabel(self)
         la.setWordWrap(True)
+        la.setText('<p>&nbsp;<br>&nbsp;</p>')
         l.addWidget(la)
         l.addWidget(self.bb)