'test_must_fail git index-pack -o bad.idx test-3.pack 2>msg &&
grep "SHA1 COLLISION FOUND" msg'
+test_expect_success \
+ 'make sure index-pack detects the SHA1 collision (large blobs)' \
+ 'test_must_fail git -c core.bigfilethreshold=1 index-pack -o bad.idx test-3.pack 2>msg &&
+ grep "SHA1 COLLISION FOUND" msg'
+
test_done