Use unittest or unittest2 test runner instead of nose for running tests from the testsuite.

Makefile

@@ -1,8 +1,12 @@
 PYTHON = python
 SETUP = $(PYTHON) setup.py
 PYDOCTOR ?= pydoctor
-TESTRUNNER = $(shell which nosetests)
-TESTFLAGS =
+ifeq ($(shell $(PYTHON) -c "import sys; print sys.version_info >= (2, 7)"),True)
+TESTRUNNER ?= unittest
+else
+TESTRUNNER ?= unittest2
+endif
+RUNTEST = PYTHONPATH=.:$(PYTHONPATH) $(PYTHON) -m $(TESTRUNNER)
 
 all: build
 
@@ -19,20 +23,14 @@ install::
 	$(SETUP) install
 
 check:: build
-	PYTHONPATH=.:$(PYTHONPATH) $(PYTHON) $(TESTRUNNER) dulwich
+	$(RUNTEST) dulwich.tests.test_suite
 
 check-nocompat:: build
-	PYTHONPATH=.:$(PYTHONPATH) $(PYTHON) $(TESTRUNNER) -e compat dulwich
+	$(RUNTEST) dulwich.tests.nocompat_test_suite
 
 check-noextensions:: clean
-	PYTHONPATH=.:$(PYTHONPATH) $(PYTHON) $(TESTRUNNER) $(TESTFLAGS) dulwich
+	$(RUNTEST) dulwich.tests.test_suite
 
 clean::
 	$(SETUP) clean --all
 	rm -f dulwich/*.so
-
-coverage:: build
-	PYTHONPATH=.:$(PYTHONPATH) $(PYTHON) $(TESTRUNNER) --cover-package=dulwich --with-coverage --cover-erase --cover-inclusive dulwich
-
-coverage-annotate: coverage
-	python-coverage -a -o /usr

dulwich/tests/__init__.py

@@ -27,36 +27,21 @@ import subprocess
 import sys
 import tempfile
 
-try:
-    from testtools.testcase import TestCase
-except ImportError:
-    from unittest import TestCase
-
 try:
     # If Python itself provides an exception, use that
     from unittest import SkipTest as TestSkipped
 except ImportError:
-    # Check if the nose exception can be used
     try:
-        import nose
+        from unittest2 import SkipTest as TestSkipped
     except ImportError:
-        try:
-            import testtools.testcase
-        except ImportError:
-            class TestSkipped(Exception):
-                def __init__(self, msg):
-                    self.msg = msg
-        else:
-            TestSkipped = testtools.testcase.TestCase.skipException
-    else:
-        TestSkipped = nose.SkipTest
-        try:
-            import testtools.testcase
-        except ImportError:
-            pass
-        else:
-            # Make testtools use the same exception class as nose
-            testtools.testcase.TestCase.skipException = TestSkipped
+        from testtools.testcase import TestSkipped
+
+try:
+    from testtools.testcase import TestCase
+except ImportError:
+    from unittest import TestCase
+else:
+    TestCase.skipException = TestSkipped
 
 
 class BlackboxTestCase(TestCase):