Update kernelspec tests

IPython/kernel/tests/test_kernelspec.py

@@ -42,21 +42,25 class KernelSpecTests(unittest.TestCase):
     
     def test_install_kernel_spec(self):
         self.ksm.install_kernel_spec(self.installable_kernel,
-                                     kernel_name='tstinstalled')
+                                     kernel_name='tstinstalled',
+                                     user=True)
         self.assertIn('tstinstalled', self.ksm.find_kernel_specs())
         
         with self.assertRaises(OSError):
             self.ksm.install_kernel_spec(self.installable_kernel,
-                                         kernel_name='tstinstalled')
+                                         kernel_name='tstinstalled',
+                                         user=True)
         
         # Smoketest that this succeeds
         self.ksm.install_kernel_spec(self.installable_kernel,
                                      kernel_name='tstinstalled',
-                                     replace=True)
-    
-    @onlyif(os.name != 'nt' and not os.access('/usr/local/share', os.W_OK), "needs Unix system without root privileges")
+                                     replace=True, user=True)
+
+    @onlyif(kernelspec.find_install_prefix() in {'/usr', '/usr/local'}
+            and not os.access('/usr/local/share', os.W_OK),
+            "needs Unix system without root privileges")
     def test_cant_install_kernel_spec(self):
         with self.assertRaises(OSError):
             self.ksm.install_kernel_spec(self.installable_kernel,
                                          kernel_name='tstinstalled',
-                                         system=True)
+                                         user=False)