Github user afs commented on the pull request: https://github.com/apache/jena/pull/94#issuecomment-156148758 It is not the code - it's the way tests are found. This is what seems to be happening - when running the JUnit tests on the package (at least in Eclipse and I believe in surefire if we didn't use "TS_"), `TestDatasetGraphInMemory`, `TestInMemory` and the inner class of `TestDatasetGraphInMemory` all get found and run. But `TestInMemory` runs `TestDatasetGraphInMemory`, and` TestDatasetGraphInMemory` runs it's inner classes. So the tests run x3, one for each level. To check, I put a break point on and it got hit three times. (Also - running the same test more than on confuses Eclipse in minor ways - some don't get marked as "run".) No need to do anything now - lets get the code in.
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