diff --git a/_pytest/config.py b/_pytest/config.py
index d6837f0fa..5156f3603 100644
--- a/_pytest/config.py
+++ b/_pytest/config.py
@@ -119,16 +119,13 @@ class PytestPluginManager(PluginManager):
 
     def register(self, plugin, name=None, conftest=False):
         ret = super(PytestPluginManager, self).register(plugin, name)
-        if ret and not conftest:
-            self._globalplugins.append(plugin)
+        if ret:
+            if not conftest:
+                self._globalplugins.append(plugin)
+            if hasattr(self, "config"):
+                self.config._register_plugin(plugin, name)
         return ret
 
-    def _do_register(self, plugin, name):
-        # called from core PluginManager class
-        if hasattr(self, "config"):
-            self.config._register_plugin(plugin, name)
-        return super(PytestPluginManager, self)._do_register(plugin, name)
-
     def unregister(self, plugin):
         super(PytestPluginManager, self).unregister(plugin)
         try:
@@ -710,8 +707,7 @@ class Config(object):
 
     def _register_plugin(self, plugin, name):
         call_plugin = self.pluginmanager.call_plugin
-        call_plugin(plugin, "pytest_addhooks",
-                    {'pluginmanager': self.pluginmanager})
+        call_plugin(plugin, "pytest_addhooks", {'pluginmanager': self.pluginmanager})
         self.hook.pytest_plugin_registered(plugin=plugin,
                                            manager=self.pluginmanager)
         dic = call_plugin(plugin, "pytest_namespace", {}) or {}
diff --git a/_pytest/core.py b/_pytest/core.py
index 0296edf75..51fb55d2b 100644
--- a/_pytest/core.py
+++ b/_pytest/core.py
@@ -201,10 +201,6 @@ class PluginManager(object):
             raise ValueError("Plugin already registered: %s=%s\n%s" %(
                               name, plugin, self._name2plugin))
         #self.trace("registering", name, plugin)
-        # allow subclasses to intercept here by calling a helper
-        return self._do_register(plugin, name)
-
-    def _do_register(self, plugin, name):
         self._plugin2hookcallers[plugin] = self._scan_plugin(plugin)
         self._name2plugin[name] = plugin
         self._plugins.append(plugin)
diff --git a/testing/test_core.py b/testing/test_core.py
index d2b9b155e..4d03433a2 100644
--- a/testing/test_core.py
+++ b/testing/test_core.py
@@ -77,6 +77,7 @@ class TestPluginManager:
         #assert not pm._unverified_hooks
         assert pm.hook.he_method1(arg=1) == [2]
 
+
 class TestAddMethodOrdering:
     @pytest.fixture
     def hc(self, pm):
@@ -283,24 +284,30 @@ class TestPytestPluginInteractions:
         pytestpm = get_plugin_manager()  # fully initialized with plugins
         saveindent = []
         class api1:
-            x = 41
             def pytest_plugin_registered(self, plugin):
                 saveindent.append(pytestpm.trace.root.indent)
-                raise ValueError(42)
+        class api2:
+            def pytest_plugin_registered(self, plugin):
+                saveindent.append(pytestpm.trace.root.indent)
+                raise ValueError()
         l = []
-        pytestpm.set_tracing(l.append)
-        indent = pytestpm.trace.root.indent
-        p = api1()
-        pytestpm.register(p)
+        undo = pytestpm.set_tracing(l.append)
+        try:
+            indent = pytestpm.trace.root.indent
+            p = api1()
+            pytestpm.register(p)
+            assert pytestpm.trace.root.indent == indent
+            assert len(l) == 2
+            assert 'pytest_plugin_registered' in l[0]
+            assert 'finish' in l[1]
 
-        assert pytestpm.trace.root.indent == indent
-        assert len(l) == 2
-        assert 'pytest_plugin_registered' in l[0]
-        assert 'finish' in l[1]
-        with pytest.raises(ValueError):
-            pytestpm.register(api1())
-        assert pytestpm.trace.root.indent == indent
-        assert saveindent[0] > indent
+            l[:] = []
+            with pytest.raises(ValueError):
+                pytestpm.register(api2())
+            assert pytestpm.trace.root.indent == indent
+            assert saveindent[0] > indent
+        finally:
+            undo()
 
 
 def test_namespace_has_default_and_env_plugins(testdir):