README: Communicate caution with tests

1 files changed, 4 insertions, 2 deletions

diff --git a/README.md b/README.md
index 126940f..ab73e79 100644
--- a/README.md
+++ b/README.md
@@ -42,10 +42,12 @@ fi
 
 ## Testing
 
-Unit tests are defined under 't/'.
+Unit tests are defined under 't/'.  Note some tests require environmental flags
+resulting in modifying your slackware system.  You should run them under docker
+as described below.
 
 ```
-prove -v t/*.t
+prove -v t
 ```
 
 You can use the Dockerfile to remove the headache for setting up the test