diff --git a/Lib/idlelib/PathBrowser.py b/Lib/idlelib/PathBrowser.py
index ef7f8ff..ae26714 100644
--- a/Lib/idlelib/PathBrowser.py
+++ b/Lib/idlelib/PathBrowser.py
@@ -17,6 +17,7 @@
         self.init(flist)
 
     def settitle(self):
+        "Set window titles."
         self.top.wm_title("Path Browser")
         self.top.wm_iconname("Path Browser")
 
@@ -70,7 +71,7 @@
 
     def ispackagedir(self, file):
         if not os.path.isdir(file):
-            return 0
+            return False
         init = os.path.join(file, "__init__.py")
         return os.path.exists(init)
 
@@ -91,7 +92,7 @@
         sorted.sort()
         return sorted
 
-def _path_browser(parent):
+def _path_browser(parent):  # htest #
     flist = PyShellFileList(parent)
     PathBrowser(flist, _htest=True)
     parent.mainloop()
diff --git a/Lib/idlelib/idle_test/test_pathbrowser.py b/Lib/idlelib/idle_test/test_pathbrowser.py
index 7ad7c97..f028414 100644
--- a/Lib/idlelib/idle_test/test_pathbrowser.py
+++ b/Lib/idlelib/idle_test/test_pathbrowser.py
@@ -1,5 +1,8 @@
 import unittest
-import idlelib.PathBrowser as PathBrowser
+import os
+import sys
+import idlelib
+from idlelib import PathBrowser
 
 class PathBrowserTest(unittest.TestCase):
 
@@ -7,6 +10,19 @@
         # Issue16226 - make sure that getting a sublist works
         d = PathBrowser.DirBrowserTreeItem('')
         d.GetSubList()
+        self.assertEqual('', d.GetText())
+
+        dir = os.path.split(os.path.abspath(idlelib.__file__))[0]
+        self.assertEqual(d.ispackagedir(dir), True)
+        self.assertEqual(d.ispackagedir(dir + '/Icons'), False)
+
+    def test_PathBrowserTreeItem(self):
+        p = PathBrowser.PathBrowserTreeItem()
+        self.assertEqual(p.GetText(), 'sys.path')
+        sub = p.GetSubList()
+        self.assertEqual(len(sub), len(sys.path))
+        # Following fails in 2.7 because old-style class
+        #self.assertEqual(type(sub[0]), PathBrowser.DirBrowserTreeItem)
 
 if __name__ == '__main__':
     unittest.main(verbosity=2, exit=False)