Issue #14742: test_unparse now only checks a limited number of files unless the 'cpu' resource is specified.
diff --git a/Lib/test/test_tools.py b/Lib/test/test_tools.py
index cbe6d80..564b747 100644
--- a/Lib/test/test_tools.py
+++ b/Lib/test/test_tools.py
@@ -127,6 +127,7 @@
 # Run the tests in Tools/parser/test_unparse.py
 with support.DirsOnSysPath(os.path.join(basepath, 'parser')):
     from test_unparse import UnparseTestCase
+    from test_unparse import DirectoryTestCase
 
 
 def test_main():