diff --git a/run-tests.sh b/run-tests.sh
index e38bb62d..2b7e0ee3 100755
--- a/run-tests.sh
+++ b/run-tests.sh
@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+# NOTE: set TEST_SUITE to be markers you want to run.
+
 set -e
 
 PYPI_VENDOR_DIR="$(pwd)/tests/pypi/"