Update blockon in hook test

Author: vtitor

testing/test_basic.py

@@ -2,8 +2,6 @@
 
 import sys
 
-import pytest
-
 
 def test_fail_later(testdir):
     testdir.makepyfile("""
@@ -108,13 +106,13 @@ def test_MAIN():
     assert outcomes.get("passed") == 1
 
 
-@pytest.mark.skip
-def test_blocon_in_hook(testdir):
+def test_blockon_in_hook(testdir):
     testdir.makeconftest("""
         import pytest_twisted as pt
         from twisted.internet import reactor, defer
 
         def pytest_configure(config):
+            pt.init_reactor()
             d = defer.Deferred()
             reactor.callLater(0.01, d.callback, 1)
             pt.blockon(d)