--- a/testing/marionette/harness/marionette_harness/tests/unit/test_title.py
+++ b/testing/marionette/harness/marionette_harness/tests/unit/test_title.py
@@ -1,12 +1,72 @@
 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-from marionette_harness import MarionetteTestCase
+import urllib
+
+from marionette_driver.by import By
+from marionette_harness import MarionetteTestCase, skip
+
+
+def inline(doc):
+    return "data:text/html;charset=utf-8,{}".format(urllib.quote(doc))
 
 
 class TestTitle(MarionetteTestCase):
-    def test_get_html_title(self):
-        test_html = self.marionette.absolute_url("test.html")
-        self.marionette.navigate(test_html)
-        self.assertEqual('Marionette Test', self.marionette.title)
+    @property
+    def document_title(self):
+        return self.marionette.execute_script("return document.title", sandbox=None)
+
+    def test_title_from_top(self):
+        self.marionette.navigate(inline("<title>foo</title>"))
+        self.assertEqual("foo", self.marionette.title)
+
+    def test_title_from_frame(self):
+        self.marionette.navigate(inline("""<title>foo</title>
+<iframe src="{}">""".format(inline("<title>bar</title>"))))
+
+        self.assertEqual("foo", self.document_title)
+        self.assertEqual("foo", self.marionette.title)
+
+        bar = self.marionette.find_element(By.TAG_NAME, "iframe")
+        self.marionette.switch_to_frame(bar)
+        self.assertEqual("bar", self.document_title)
+        self.assertEqual("foo", self.marionette.title)
+
+    def test_title_from_nested_frame(self):
+        self.marionette.navigate(inline("""<title>foo</title>
+<iframe id=bar src="{}">""".format(inline("""<title>bar</title>
+<iframe id=baz src="{}">""".format(inline("<title>baz</title>"))))))
+
+        self.assertEqual("foo", self.document_title)
+        self.assertEqual("foo", self.marionette.title)
+
+        bar = self.marionette.find_element(By.ID, "bar")
+        self.marionette.switch_to_frame(bar)
+        self.assertEqual("bar", self.document_title)
+        self.assertEqual("foo", self.marionette.title)
+
+        baz = self.marionette.find_element(By.ID, "baz")
+        self.marionette.switch_to_frame(baz)
+        self.assertEqual("baz", self.document_title)
+        self.assertEqual("foo", self.marionette.title)
+
+    @skip("https://bugzilla.mozilla.org/show_bug.cgi?id=1255946")
+    def test_navigate_top_frame_from_nested_context(self):
+        self.marionette.navigate(inline("""<title>foo</title>
+<iframe src="{}">""".format(inline("""<title>bar</title>
+<a href="{}" target=_top>consume top frame</a>""".format(inline("<title>baz</title>"))))))
+
+        self.assertEqual("foo", self.document_title)
+        self.assertEqual("foo", self.marionette.title)
+
+        bar = self.marionette.find_element(By.TAG_NAME, "iframe")
+        self.marionette.switch_to_frame(bar)
+        self.assertEqual("bar", self.document_title)
+        self.assertEqual("foo", self.marionette.title)
+
+        consume = self.marionette.find_element(By.TAG_NAME, "a")
+        consume.click()
+
+        self.assertEqual("baz", self.document_title)
+        self.assertEqual("baz", self.marionette.title)