diff --git a/mozilla/webshell/tests/viewer/Makefile.in b/mozilla/webshell/tests/viewer/Makefile.in
index 83ec450c82b..60e7474f27b 100644
--- a/mozilla/webshell/tests/viewer/Makefile.in
+++ b/mozilla/webshell/tests/viewer/Makefile.in
@@ -29,6 +29,8 @@ PROGRAM	= viewer
 EXPORT_RESOURCE_SAMPLES := \
 	$(wildcard $(srcdir)/samples/test*.html) \
 	$(wildcard $(srcdir)/samples/toolbarTest*.xul) \
+	$(wildcard $(srcdir)/samples/treeTest*.xul) \
+	$(wildcard $(srcdir)/samples/treeTest*.css) \
 	$(wildcard $(srcdir)/samples/xulTest.css) \
 	$(srcdir)/resources/find.html \
 	$(srcdir)/resources/printsetup.html \
diff --git a/mozilla/webshell/tests/viewer/makefile.win b/mozilla/webshell/tests/viewer/makefile.win
index 8a508dc38db..634dfcd42ca 100644
--- a/mozilla/webshell/tests/viewer/makefile.win
+++ b/mozilla/webshell/tests/viewer/makefile.win
@@ -150,7 +150,9 @@ install:: $(PROGRAM)
 	$(MAKE_INSTALL) samples\test_pr.html $(DIST)\bin\res\samples
 	$(MAKE_INSTALL) samples\test_gfx.html $(DIST)\bin\res\samples
 	$(MAKE_INSTALL) samples\toolbarTest1.xul $(DIST)\bin\res\samples
+	$(MAKE_INSTALL) samples\treeTest1.xul $(DIST)\bin\res\samples
 	$(MAKE_INSTALL) samples\xulTest.css $(DIST)\bin\res\samples
+	$(MAKE_INSTALL) samples\treeTest1.css $(DIST)\bin\res\samples
 	$(MAKE_INSTALL) throbber\anims00.gif $(DIST)\bin\res\throbber
 	$(MAKE_INSTALL) throbber\anims01.gif $(DIST)\bin\res\throbber
 	$(MAKE_INSTALL) throbber\anims02.gif $(DIST)\bin\res\throbber