1 files changed, 16 insertions, 0 deletions
diff --git a/coverage/misc.py b/coverage/misc.py
index 5d330c6..270c146 100644
--- a/coverage/misc.py
+++ b/coverage/misc.py
@@ -10,6 +10,7 @@ import locale
 import os
 import sys
 import types
+import unittest
 
 from coverage import env
 from coverage.backward import to_bytes, unicode_class
@@ -264,3 +265,18 @@ class ExceptionDuringRun(CoverageException):
 
     """
     pass
+
+
+class StopEverything(unittest.SkipTest):
+    """An exception that means everything should stop.
+
+    This derives from SkipTest so that tests that spring this trap will be
+    skipped automatically, without a lot of boilerplate all over the place.
+
+    """
+    pass
+
+
+class IncapablePython(CoverageException, StopEverything):
+    """An operation is attempted that this version of Python cannot do."""
+    pass