README: explain TMPDIR=/dev/shm plainly

1 files changed, 2 insertions, 2 deletions

diff --git a/README.md b/README.md
index cd1c5639..abb35978 100644
--- a/README.md
+++ b/README.md
@@ -55,8 +55,8 @@ If you're a developer, here's how you can run the test suite:
 	make -j5 PROFILE=1 all test
 	(cd test && TMPDIR=/dev/shm ./test --order rand)
 
-Note the use of ramdisk as `TMPDIR`: some of our tests require temporary files,
-which degrades the performance quite a bit if `TMPDIR` isn't in-memory.
+Note the use of ramdisk as `TMPDIR`: some tests create temporary files, which
+slows them down if `TMPDIR` is on HDD or even SSD.
 
 Support
 -------