From 7e81ce6bb8fcb69df7ab698a498bda5d53ded11c Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Thu, 22 Jun 2023 16:10:06 +0200
Subject: [PATCH] docs: describe $TESTFUNCS briefly

Follow-up for f1a83e41ae985bd17056b3a9fe285cc196358183
---
 docs/ENVIRONMENT.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/ENVIRONMENT.md b/docs/ENVIRONMENT.md
index f1b9fd7715c..746dcfb9fa8 100644
--- a/docs/ENVIRONMENT.md
+++ b/docs/ENVIRONMENT.md
@@ -368,6 +368,10 @@ systemd tests:
 * `$SYSTEMD_TEST_NSS_BUFSIZE` — size of scratch buffers for "reentrant"
   functions exported by the nss modules.
 
+* `$TESTFUNCS` – takes a colon separated list of test functions to invoke,
+  causes all non-matching test functions to be skipped. Only applies to tests
+  using our regular test boilerplate.
+
 fuzzers:
 
 * `$SYSTEMD_FUZZ_OUTPUT` — A boolean that specifies whether to write output to