diff --git a/fhem/t/README b/fhem/t/README
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index 000000000..947b29f3a
--- /dev/null
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+Execute all the tests from the directory above with:
+  prove t/*/*.t
+
+Building a single test is easier with
+  perl fhem.pl t/00_MQTT2_SERVER/01_autocreate.t
+as you'll see the Log
+
+Each test needs a config file, with is either fhem.cfg or testname.cfg