diff --git a/tests/README.txt b/tests/README.txt
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+The nodes tests need to run before the others in order to avoid a race
+condition involving fixture initialization. Please see
+https://discord.com/channels/1020123559063990373/1156089584808120382/1156802853323673620
+for an explanation.
+
+For this reason, the subtests are grouped into alphabetically-ordered
+folders. Do not use numeric prefixes (e.g. 00_nodes) because this
+breaks python's import system.