Oops, get_tests may be called with 3 arguments.
diff --git a/Lib/ctypes/test/__init__.py b/Lib/ctypes/test/__init__.py
index 24738ea..e2878f2 100644
--- a/Lib/ctypes/test/__init__.py
+++ b/Lib/ctypes/test/__init__.py
@@ -50,7 +50,7 @@
if fnmatch.fnmatchcase(fnm, mask):
yield "%s.%s" % (package.__name__, os.path.splitext(fnm)[0])
-def get_tests(package, mask, verbosity, exclude):
+def get_tests(package, mask, verbosity, exclude=()):
"""Return a list of skipped test modules, and a list of test cases."""
tests = []
skipped = []
diff --git a/Lib/ctypes/test/runtests.py b/Lib/ctypes/test/runtests.py
index 14d7caa..ec31fc8 100644
--- a/Lib/ctypes/test/runtests.py
+++ b/Lib/ctypes/test/runtests.py
@@ -8,6 +8,8 @@
Add resources to the lits of allowed resources. '*' allows all
resources.
-v verbose mode: print the test currently executed
+ -x<test1[,test2...]>
+ Exclude specified tests.
mask mask to select filenames containing testcases, wildcards allowed
"""
import sys