Skip test_bigmem.test_unicode_repr_oflw, since it crashes (issue #14904).
diff --git a/Lib/test/test_bigmem.py b/Lib/test/test_bigmem.py
index 2adae4e..c41c373 100644
--- a/Lib/test/test_bigmem.py
+++ b/Lib/test/test_bigmem.py
@@ -124,6 +124,7 @@
 
     @precisionbigmemtest(size=_4G // 5, memuse=6+2)
     def test_unicode_repr_oflw(self, size):
+        self.skipTest("test crashes - see issue #14904")
         try:
             s = u"\uAAAA"*size
             r = repr(s)