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-rw-r--r--doc/HACKING/WritingTests.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/doc/HACKING/WritingTests.txt b/doc/HACKING/WritingTests.txt
index 977b8369f2..d2e05dd3a0 100644
--- a/doc/HACKING/WritingTests.txt
+++ b/doc/HACKING/WritingTests.txt
@@ -329,7 +329,9 @@ into test/slow if it genuinely needs to be run.
Tests should not alter global state unless they run with TT_FORK: Tests
should not require other tests to be run before or after them.
-Tests should not leak memory or other resources.
+Tests should not leak memory or other resources. To find out if your tests
+are leaking memory, run them under valgrind (see HelpfulTools.txt for more
+information on how to do that).
When possible, tests should not be over-fit to the implementation. That is,
the test should verify that the documented behavior is implemented, but