diff --git a/IPython/core/tests/test_display.py b/IPython/core/tests/test_display.py
index 3d63a72..5fb3c2a 100644
--- a/IPython/core/tests/test_display.py
+++ b/IPython/core/tests/test_display.py
@@ -50,11 +50,8 @@ def test_image_filename_defaults():
                      embed=True)
     nt.assert_raises(ValueError, display.Image)
     nt.assert_raises(ValueError, display.Image, data='this is not an image', format='badformat', embed=True)
-    from IPython.html import DEFAULT_STATIC_FILES_PATH
     # check boths paths to allow packages to test at build and install time
-    imgfile = os.path.join(tpath, 'html/static/base/images/logo.png')
-    if not os.path.exists(imgfile):
-        imgfile = os.path.join(DEFAULT_STATIC_FILES_PATH, 'base/images/logo.png')
+    imgfile = os.path.join(tpath, 'core/tests/2x2.png')
     img = display.Image(filename=imgfile)
     nt.assert_equal('png', img.format)
     nt.assert_is_not_none(img._repr_png_())
diff --git a/IPython/core/tests/test_magic.py b/IPython/core/tests/test_magic.py
index 101a006..c5dc30e 100644
--- a/IPython/core/tests/test_magic.py
+++ b/IPython/core/tests/test_magic.py
@@ -619,18 +619,16 @@ def test_extension():
         tmpdir.cleanup()
 
 
-# The nose skip decorator doesn't work on classes, so this uses unittest's skipIf
-@skipIf(dec.module_not_available('IPython.nbformat'), 'nbformat not importable')
-class NotebookExportMagicTests(TestCase):
-    def test_notebook_export_json(self):
-        _ip = get_ipython()
-        _ip.history_manager.reset()   # Clear any existing history.
-        cmds = [u"a=1", u"def b():\n  return a**2", u"print('noël, été', b())"]
-        for i, cmd in enumerate(cmds, start=1):
-            _ip.history_manager.store_inputs(i, cmd)
-        with TemporaryDirectory() as td:
-            outfile = os.path.join(td, "nb.ipynb")
-            _ip.magic("notebook -e %s" % outfile)
+@dec.skip_without('jupyter_nbformat')
+def test_notebook_export_json():
+    _ip = get_ipython()
+    _ip.history_manager.reset()   # Clear any existing history.
+    cmds = [u"a=1", u"def b():\n  return a**2", u"print('noël, été', b())"]
+    for i, cmd in enumerate(cmds, start=1):
+        _ip.history_manager.store_inputs(i, cmd)
+    with TemporaryDirectory() as td:
+        outfile = os.path.join(td, "nb.ipynb")
+        _ip.magic("notebook -e %s" % outfile)
 
 
 class TestEnv(TestCase):
diff --git a/IPython/core/tests/test_run.py b/IPython/core/tests/test_run.py
index 267a8f3..a521f37 100644
--- a/IPython/core/tests/test_run.py
+++ b/IPython/core/tests/test_run.py
@@ -375,10 +375,10 @@ tclass.py: deleting object: C-third
         with tt.AssertNotPrints('SystemExit'):
             _ip.magic('run -e %s' % self.fname)
 
-    @dec.skip_without('IPython.nbformat')  # Requires jsonschema
+    @dec.skip_without('jupyter_nbformat')  # Requires jsonschema
     def test_run_nb(self):
         """Test %run notebook.ipynb"""
-        from IPython.nbformat import v4, writes
+        from jupyter_nbformat import v4, writes
         nb = v4.new_notebook(
            cells=[
                 v4.new_markdown_cell("The Ultimate Question of Everything"),
diff --git a/IPython/terminal/tests/test_help.py b/IPython/terminal/tests/test_help.py
index 262a375..0280f08 100644
--- a/IPython/terminal/tests/test_help.py
+++ b/IPython/terminal/tests/test_help.py
@@ -25,6 +25,6 @@ def test_locate_help():
 def test_locate_profile_help():
     tt.help_all_output_test("locate profile")
 
-@skip_without('IPython.nbformat')  # Requires jsonschema to be installed
+@skip_without('jupyter_nbformat')  # Requires jsonschema to be installed
 def test_trust_help():
     tt.help_all_output_test("trust")